DS660 Online Self-Cleaning Colour Sensor, using our own R & D and design of optical devices, color sensor using optical absorption method of measurement principle, input installation online measurement, avoiding the process of complex sampling and laboratory measurements. No reagents, no pollution, more economical and environmentally friendly. Compact size, easy maintenance, the sensor with an automatic cleaning brush, and automatic compensation for turbidity interference, even for long-term online water quality monitoring still has excellent stability. It can be widely used for monitoring drinking water, surface water, municipal and industrial wastewater processing.

Features of DS660 Colour Sensor

-Digital RS-485 signal with standard MODBUS protocol;

-Automatic compensation for turbidity interference ensures more accurate data and stable product performance;

-Equipped with a self-cleaning brush to prevent microbial buildup, a longer maintenance cycle;

-Built-in calibration parameters for easy on-site use and secondary calibration;

-Real-time continuous online measurement.

Specifications

Applications of DS660 Online Self-Cleaning Colour Sensor

-Wastewater Treatment:

Sensors measure the color of wastewater to ensure it is properly treated before being discharged into the environment. Color changes can indicate the presence of pollutants or incomplete treatment.

-Aquaculture Water Quality Monitoring:

In fish farms and aquatic cultivation, color sensors monitor the clarity and cleanliness of water, which is crucial for maintaining healthy aquatic ecosystems.

-River and Lake Monitoring:

Color sensors help detect changes in water quality, which may indicate pollution, algae growth, or sediment disturbances.

-Process Water Quality Control:

Many industries, such as food processing, paper production, and textiles, use color sensors to monitor process water quality, ensuring product consistency and regulatory compliance.

-Effluent Discharge:

Monitoring the color of water discharged from industrial processes helps companies ensure that wastewater meets acceptable environmental standards.

-Drinking Water Treatment:

Color sensors help monitor the color of treated water to ensure it meets regulatory standards and is free from contaminants that can affect the taste or appearance of drinking water.

FAQ – Water Color Sensor

What is a Water Color Sensor?
A Water Color Sensor is a device used to measure the color of water, often applied to assess water quality. It detects changes in the color of the water, which can indicate the presence of contaminants, organic matter, or chemicals in the water.

How does a Water Color Sensor work?
A Water Color Sensor typically operates using light absorption or scattering techniques. It shines light through the water and measures the amount of light that is absorbed or reflected by the water. Different substances in the water absorb or reflect light differently, allowing the sensor to detect changes in water color.

What is the measurement principle of a Water Color Sensor?
Most Water Color Sensors operate based on light absorption or scattering. The sensor emits light of various wavelengths (often using LEDs) through the water sample and measures the intensity of the light that passes through or is reflected. The sensor analyzes this data to determine the color of the water.

Why is water color important in water quality monitoring?
Water color can indicate the presence of various substances, such as dissolved organic matter, algae, sediment, or pollutants. A change in water color may suggest contamination or shifts in the ecological balance of a water source.

Can a Water Color Sensor detect specific contaminants?
While Water Color Sensors can detect color changes, they may not directly identify specific contaminants. However, certain pollutants, such as dissolved organic matter or algal blooms, can cause noticeable color changes that the sensor can detect.

What is the difference between turbidity and color in water analysis?
Turbidity measures the cloudiness caused by suspended particles, while color usually indicates dissolved substances. Turbidity sensors measure how much light is scattered by particles, whereas color sensors measure how light is absorbed by dissolved materials.

How is a Water Color Sensor calibrated?
Water Color Sensors are calibrated using reference solutions with known colors. These reference standards ensure that the sensor provides accurate measurements over a range of colors. Regular calibration is recommended to maintain accuracy.

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The post DS660 Water Colour Sensor for Real-time Colour Monitoring appeared first on Water Quality Sensors.

A CDOM sensor (Colored Dissolved Organic Matter sensor) is a device used to measure the concentration of dissolved organic matter in water, particularly organic substances that absorb and emit light. OPS DS630 CDOM Sensor adopts the analysis principle of the ultraviolet fluorescence method. It can be widely used for monitoring seawater, river water, drinking water, and wastewater.

The DS630 CDOM Probe features high precision, high sensitivity, and compact size, and it is equipped with an automatic cleaning brush that eliminates bubbles and reduces contamination’s impact on measurements, thereby extending the maintenance cycle. As an energy-efficient and environmentally friendly anti-fouling solution, it ensures long-term stability of measurements.

Measuring Principle of DS630 CDOM Sensor

CDOM absorbs light in the ultraviolet to blue range of the spectrum (250-500 nm) and often emits fluorescence in the blue to green spectrum. Sensors typically measure either the absorption or the fluorescence emitted by CDOM when excited by specific wavelengths of light.

Features of DS630 CDOM Sensor

-Digital RS-485 signal with standard MODBUS protocol;
-Measurement range 0 – 5000ppb.
-Utilizes the principle of UV fluorescence analysis to detect colored dissolved organic matter in water;
-Capable of measuring seawater and high-salinity samples;
-Equipped with a self-cleaning brush to prevent microbial attachment, extending the maintenance cycle;
-Built-in calibration parameters for convenient on-site use and secondary calibration.
-Low maintenance.

Specifications

Applications of CDOM sensor 

-Rivers and lakes monitoring
-Wastewater and water treatment
-Pollution surveillance & investigative monitoring
-Point source pollution tracking
-Hydrocarbon monitoring in ports & coastal areas
-Road and airport apron run-off monitoring
-Pollution ingress into infrastructures
-Monitoring industrial effluent discharge in natural waters
-Environmental monitoring
-Marine research
-Aquaculture

FAQs

What is Colored Dissolved Organic Material (CDOM)?
Colored Dissolved Organic Matter (CDOM) refers to organic matter dissolved in water that can absorb and emit light. CDOM is primarily composed of naturally derived organic substances, such as decomposed plant material and soil organic matter, and is widely found in bodies of water such as rivers, lakes, and oceans.

Why Measure CDOM in Water?
Measuring Colored Dissolved Organic Matter (CDOM) in water is important. Because of its propensity for absorbing UV and blue light, an overabundance of CDOM/FDOM can severely limit aquatic photosynthesis, sparking vegetative death and decomposition and sapping water systems of dissolved oxygen (DO). In sufficient quantities, CDOM/FDOM may also impact rates of air-gas exchange, influence water surface temperatures, and disrupt drinking water production.

What is the difference between CDOM and FDOM?
Fluorescent Dissolved Organic Matter (FDOM) is the fraction of CDOM that fluoresces. FDOM is a surrogate for CDOM and a fast and easy means of tracking DOM in natural waters.

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The post DS630 CDOM (Colored Dissolved Organic Matter) Sensor appeared first on Water Quality Sensors.

The digital conductivity sensor adopts a new generation of four-electrode/six-electrode technology, with a wide measurement range and automatic range switching. Automatic temperature compensation for the changing temperature of the water body. It has excellent anti-pollution ability and will not cause polarization even in harsh environments for long-term online monitoring. An RS458 output can be networked without a controller.

Features of DS480 Water Conductivity Sensor:

1. Small in size, it can be assembled in many ways.
2. Wide measurement range, automatic switching of measurement ranges.
3. Built-in temperature sensor, automatic temperature compensation.
4. four/six electrode technology, no polarization.
5. Digital Sensor, RS458 output, support Modbus.

Technical parameter:

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The post DS480 Water Conductivity Sensor Online Conductivity Probe appeared first on Water Quality Sensors.

COD, BOD, and TSS are important water quality parameters for wastewater treatment operations. The online COD BOD TSS Sensor Analyzer can be used to detect the Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), and Total Suspended Solids (TSS) values of water quality.

The DS500 series Online COD BOD TSS Sensor Analyzer is a new generation of environmental protection-type sensors launched by OPS. It is based on the UV absorption principle, reagent-free, pollution-free, more economical, and environmentally friendly. Small size, more convenient installation, and online continuous water quality monitoring. Automatic compensation for turbidity interference, automatic cleaning devices, and even long-term monitoring still have excellent stability. It can be used in harsh environments, and the monitoring data is stable and reliable. Multiple path length options are available to ensure our clients have the detection range that meets their wastewater monitoring demands.

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Online COD BOD TSS Sensor Analyzer Principle

Many organic substances dissolved in water absorb ultraviolet light. Therefore, the total amount of organic pollutants in water can be measured by measuring the absorption of these organic substances by ultraviolet light at a wavelength of 254 nm. DS500 series sensors use two light sources, one 254nm ultraviolet light and one 850nm infrared light, which can automatically compensate for the optical path attenuation and turbidity effects, thus achieving more stable and reliable measurement values. The sensors measure organics in a multi-dimensional way that results in improved correlations to water quality parameters such as BOD, COD, and TSS.

Features of DS500 series Online COD BOD TSS Sensor Analyzer

-Digital sensors, RS-485 output, Modbus protocol;

-With automatic cleaning function and few maintenance;

-No chemical reagents, no secondary pollution;

-Direct immersion COD measurement without sampling;

-Quick response time and precision for COD continuous measurement;

-Real-time data transmission allows you to get timely and accurate data on monitoring water;

-Corrosion-resistant shell, easy to install;

-Proven UVC LED technology, long lifetime, stable and instant measurement;

-Measurement of parameters such as COD, TOC, TSS, and temperature;

-Adopts low power consumption design and has the characteristics of anti-interference performance;

-Automatic compensation for turbidity interference for excellent test performance.

Technology Parameter

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Application Areas of Online COD BOD TSS Sensor Analyzer

-Surface Water Pollution Detection and Monitoring

-Urban Well Monitoring

-River & lake Water Quality Monitoring

-Sewage Treatment Plant Water Quality Monitoring

-Fishery Water Quality Pollution Monitoring

-Fish farming, aquaculture

-Swimming Pool Water Quality Monitoring

-Industrial and Mining Enterprises, Detection of Urban Sewage Discharge

-Water quality monitoring of petrochemical, chemical, power generation, pharmaceutical, food, electronic, water plant, etc

-Water quality inspection of urban parks

-Smart city water quality detection

-Urban wastewater treatment: detecting organic load variations during input/ treatment process/ output.

-Treatment of industrial effluents

-Drinking water: monitoring Organic matter in raw water, oxidation process, coagulation, activated carbon filtration.

OPS COD Sensors Use sites

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FAQs about Online COD BOD TSS Sensor Analyzer

1. What is COD, BOD, and TSS?

COD, BOD, and TSS are commonly used terms in environmental science and wastewater treatment.

COD: Chemical Oxygen Demand

COD measures the amount of oxygen required to chemically oxidize organic and inorganic matter in water. It is a measure of the pollution load, particularly the amount of organic pollutants, in water. COD is often used as an indicator of water quality and pollution levels in industrial and municipal wastewater.

BOD: Biochemical Oxygen Demand

BOD refers to the amount of dissolved oxygen consumed by microorganisms while decomposing organic matter in water. It indicates the level of organic pollution in water and the amount of oxygen needed for aerobic biological processes to break down organic pollutants. BOD is a key parameter in assessing the effectiveness of wastewater treatment processes and the overall health of aquatic ecosystems.

TSS: Total Suspended Solids

TSS represents the concentration of solid particles suspended in water, including organic and inorganic matter. These particles can include silt, sediment, organic debris, and other materials that are not dissolved in the water. It is an important parameter in assessing water clarity, sedimentation, and overall water quality, particularly in evaluating the effectiveness of sediment control measures and wastewater treatment processes.

2. Why Measure Chemical Oxygen Demand (COD)?

(1) Assessing Water Quality: COD measurement provides valuable information about the organic pollution level in water bodies. High COD levels indicate the presence of organic contaminants, which can adversely affect aquatic ecosystems and human health if not properly treated.

(2) Monitoring Wastewater Treatment Efficiency: In industrial and municipal wastewater treatment plants, measuring COD helps operators assess the efficiency of treatment processes. By monitoring COD levels in influent and effluent wastewater, operators can determine how effectively organic pollutants are being removed during treatment.

(3) Compliance with Regulations: Many environmental regulations set limits on the allowable COD levels in wastewater discharges. Industries and municipalities must comply with these regulations to avoid fines and penalties. Regular COD monitoring ensures compliance with regulatory requirements.

(4) Optimizing Treatment Processes: COD data allows wastewater treatment plant operators to optimize treatment processes for maximum efficiency. By tracking COD levels and adjusting treatment parameters accordingly, operators can improve the removal of organic pollutants and minimize environmental impact.

(5) Predicting Oxygen Depletion: High COD levels in water bodies can lead to oxygen depletion as microorganisms decompose organic matter, leading to conditions such as hypoxia or anoxia, which can harm aquatic life. Measuring COD helps predict and prevent such oxygen depletion events.

(6) Research and Development: COD measurement is also valuable in research and development efforts aimed at developing more efficient and sustainable wastewater treatment technologies. Researchers use COD data to evaluate the performance of new treatment methods and technologies.

3. What Processes Require Chemical Oxygen Demand (COD) Monitoring?

-Municipal and industrial wastewater treatment

-Primary Treatment.

-Secondary Treatment.

-Discharge limits.

-Continuous monitoring of organic matter load in the sewage treatment process.

-On-line real-time monitoring of influent and outflow water of the wastewater treatment.

4. Why is COD an Important Water Quality Parameter?

COD is an important water quality parameter and is used in a wide range of applications, including:

1, To confirm wastewater discharge and the waste treatment procedure meets criteria set by regulators;

2, To quantify the biodegradable fraction of wastewater effluent – ratio between BOD and COD;

3, COD or BOD measurements are also used as an indicator of the size of a wastewater treatment plant required for a specific location.

5. What to Consider When Selecting a Method to Analyze Oxygen Demand?

-Specific test application

-The oxidant to be used

-Time to completion

-Accuracy and precision of the measurement

VIDEOS

Related Articles

Top 9 Water Quality Sensors For Wastewater Treatments

Application of COD Sensor in sewage treatment

28 sets COD Sensors were Ready to ship to India for sewage treatment

Various Applications of OPS Chemical Oxygen Demand sensors

What are Online COD BOD TSS analyzers?

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The post DS500 Online COD BOD TSS Sensor Analyzer appeared first on Water Quality Sensors.

The Inline Total Dissolved Solids (TDS) Sensor adopts a new generation of four-electrode/ six-electrode technology, with a wide measurement range, automatic switching measurement range, a built-in temperature sensor, and real-time temperature compensation. It has excellent anti-pollution ability and will not cause polarization even in a harsh environment for long-term online monitoring. An RS-485 output can be networked without a controller.

Features:

1. Digital sensor, RS485 output, support Modbus;
2. Wide measurement range, automatic switching measurement range.
3. Built-in temperature sensor, real-time temperature compensation;
4. Four-electrode/six-electrode technology, no polarization.

Technical parameter:

Inline Total Dissolved Solids (TDS) Sensor Video

FAQs

1. What is TDS?

TDS stands for Total Dissolved Solids, and it is used to measure the concentration of dissolved substances in a liquid, typically water. These substances include minerals, salts, and organic matter that are small enough to pass through a filter.

2. What is TDS used to measure?

TDS is used to:

Assess water quality – Higher TDS levels may indicate hard water or contamination.

Monitor drinking water purity – Safe drinking water usually has a TDS below 500 mg/L.

Evaluate the performance of water filters – Checking TDS before and after filtration.

Test aquariums, hydroponics, and pools – To maintain healthy water conditions for plants or animals.

Industrial applications – Like boiler water quality, or in food and beverage production.

3. What is a TDS sensor?

A TDS sensor is an electronic device that measures the total concentration of dissolved solids in water. It usually works by:

Measuring electrical conductivity (EC) of the water, because dissolved ions increase conductivity.

Converting the EC value into an estimated TDS value, typically reported in ppm (parts per million).

Common Types:

Handheld TDS meters – Portable and widely used for on-the-spot water testing.

Inline TDS sensors – Installed in water systems for continuous monitoring.

Note: TDS sensors give an estimate of total solids but don’t identify what the solids are (e.g., specific minerals or contaminants). For a detailed analysis, lab testing is needed.

4. What’s the difference between TDS and EC sensors?

EC sensor gives a direct reading of electrical conductivity (µS/cm or mS/cm).

TDS sensor converts EC to ppm using a multiplier.

Some devices offer dual EC/TDS readings.

5. What does a TDS sensor measure?

A TDS sensor estimates the total concentration of dissolved solids in water by measuring its electrical conductivity (EC) and converting it to parts per million (ppm).

6. What is a good TDS value for drinking water?

Ideal range: 0–300 ppm

Acceptable: Up to 500 ppm (as per WHO and EPA guidelines)

Above 500 ppm: May affect taste, and could indicate contamination or high mineral content

7. How does a TDS sensor work?

It measures electrical conductivity in water. Since dissolved salts and minerals conduct electricity, higher conductivity means higher TDS. The sensor converts this data into a TDS reading, typically using a conversion factor (~0.5–0.7, depending on the sensor and solution type).

8. What substances contribute to TDS?

-Calcium

-Magnesium

-Sodium

-Potassium

-Bicarbonates

-Chlorides

-Sulfates

-Organic matter and some metals

9. How often should I calibrate a TDS sensor?

Typically: Every 3–6 months

Or whenever readings seem inaccurate

10. Can TDS sensors be used in hot water?

Most TDS sensors are rated for room temperature to about 50°C (122°F). For higher temperatures, use a sensor rated for industrial or lab use.

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The post DS285 Inline Digital Total Dissolved Solids (TDS) Sensor appeared first on Water Quality Sensors.

Water hardness is a critical parameter in water quality monitoring and industrial process control. Hard water, which contains high concentrations of dissolved minerals such as calcium (Ca²⁺) and magnesium (Mg²⁺), can cause scaling, equipment damage, and operational inefficiencies in many water systems.

Traditionally, water hardness measurement relied on laboratory titration methods that required manual sampling and chemical reagents. While these methods can provide accurate results, they are not suitable for modern automated water treatment facilities that require continuous monitoring and real-time process control.

The Online Water Hardness Sensor provides an advanced solution for continuous hardness monitoring in water systems. By delivering accurate and real-time measurements, this sensor helps operators optimize water treatment processes, prevent scale formation, and ensure stable water quality.

DS600 Online Water Hardness Sensor and Analyzer is an analytical instrument designed to continuously measure the concentration of calcium and magnesium ions in water. The sensor is typically installed directly in pipelines, bypass systems, or open water tanks, allowing it to monitor water hardness levels continuously.

Measured data can be transmitted to monitoring platforms such as:

• SCADA systems
• PLC controllers
• Industrial automation systems
• Cloud-based monitoring platforms

This real-time data enables operators to respond quickly to changes in water quality and optimize chemical dosing or water treatment operations.

DS600 Online Water Hardness Sensor and Analyzer uses an industrial wire electrode with a flat front end for easy cleaning. Built-in temperature sensor for automatic temperature compensation, suitable for online long-term monitoring.

Key Features of the Online Water Hardness Sensor

1, Continuous Real-Time Monitoring

One of the main advantages of an online hardness sensor is the ability to monitor water quality continuously. Real-time data allows operators to detect hardness fluctuations immediately and take corrective actions.

2, High Measurement Accuracy

The sensor uses high-quality ion-selective membranes and advanced signal processing technology to achieve stable and accurate measurements. This ensures reliable hardness monitoring even in complex water environments.

3, Fast Response Time

Compared to traditional laboratory methods that may take several minutes to hours, the sensor typically provides measurement results within 30 to 60 seconds, enabling rapid process adjustments.

4, Automatic Temperature Compensation

Temperature changes can influence electrochemical sensors. Integrated temperature compensation automatically adjusts readings to maintain accuracy.

5, Industrial-Grade Durability

The sensor housing is constructed from corrosion-resistant materials designed to withstand harsh industrial environments such as chemical plants, power plants, and wastewater facilities.

6, Low Maintenance Requirements

The sensor is designed for long-term stability with minimal maintenance. Routine cleaning and occasional calibration are usually sufficient to maintain performance.

7, Digital sensor, RS-485 output, supports MODBUS.

It is equipped with an RS-485 interface that allows easy and fast sensor configuration via Modbus. It can be easily connected to the monitoring system.

8, Unaffected by transmission distance for better stability.

Technical Parameter

Working Principle of the Water Hardness Sensor

Measurement Process

1, Ion Selective Detection

The sensor contains a specialized membrane that selectively responds to hardness ions such as Ca²⁺ and Mg²⁺.

2, Electrochemical Reaction

When the sensor membrane interacts with these ions, an electrochemical potential is generated.

3, Signal Conversion

The electrode converts this potential into an electrical signal proportional to the concentration of hardness ions.

4, Signal Processing

The internal transmitter processes the signal using calibration algorithms to convert it into hardness values, typically expressed as mg/L CaCO₃.

5, Temperature Compensation

Temperature variations can influence electrochemical measurements. Integrated temperature compensation ensures measurement stability across different operating conditions.

This technology enables fast, reliable, and continuous hardness monitoring.

Applications of Water Hardness Sensors

Online hardness sensors are widely used in many industries that rely on controlled water quality.

1, Boiler Water Monitoring

Boiler systems are extremely sensitive to hardness ions. Even small concentrations of calcium or magnesium can cause scale buildup that reduces heat transfer efficiency and increases energy consumption.

Continuous hardness monitoring ensures proper operation of water softening systems and prevents scaling damage.

2, Cooling Tower Systems

Cooling towers use large volumes of water that can accumulate hardness minerals over time. Without proper monitoring, scale deposits can form on heat exchanger surfaces.

Hardness sensors help operators control chemical dosing and maintain optimal cooling efficiency.

3, Drinking Water Treatment Plants

Municipal water treatment facilities often adjust hardness levels through lime softening or other treatment processes.

Real-time monitoring ensures consistent water quality and regulatory compliance.

4, Reverse Osmosis Systems

Hardness ions are a major contributor to membrane scaling in reverse osmosis systems. Monitoring hardness levels before the RO system helps protect membranes and extend equipment lifespan.

5, Industrial Water Treatment

Many industries require strict water quality control, including:

• power generation
• semiconductor manufacturing
• chemical processing
• food and beverage production
• pharmaceutical manufacturing

Online hardness sensors help maintain process stability and reduce operational risks.

6, Aquaculture Systems

Water hardness plays an important role in aquatic ecosystems, affecting fish health and mineral balance.

Continuous monitoring ensures optimal water conditions for aquaculture production.

Advantages Over Traditional Hardness Testing Methods

Online hardness sensors provide several advantages:

As industries move toward smart water management, online monitoring solutions are becoming the preferred approach.

Understanding Water Hardness in Water Treatment

Water hardness refers to the concentration of dissolved minerals, primarily calcium and magnesium ions. These minerals enter water through natural geological processes as water flows through limestone, gypsum, and other mineral deposits.

Hardness is typically expressed in the following units:

• mg/L as CaCO₃
• ppm (parts per million)
• German degrees (°dH)
• French degrees (°fH)

Based on the hardness level, water can be classified as:

While moderate hardness may not significantly affect drinking water quality, high hardness levels can create serious operational challenges in industrial systems.

Common problems caused by high water hardness include:

• Scale formation in pipelines and heat exchangers
• Reduced heat transfer efficiency in boilers
• Increased energy consumption
• Fouling of reverse osmosis membranes
• Reduced the effectiveness of detergents and chemicals
• Maintenance and equipment downtime

Continuous hardness monitoring allows operators to control treatment processes before these problems occur.

Video

Frequently Asked Questions

1, What is hardness?

Water hardness refers to the concentration of dissolved minerals in water, primarily calcium (Ca²⁺) and magnesium (Mg²⁺) ions. These minerals naturally dissolve into water as it flows through geological formations such as limestone, chalk, and gypsum.

While hardness does not usually pose a health risk, it can cause significant operational problems in industrial water systems, such as scaling and equipment fouling.

Hardness is one of the most important parameters monitored in water treatment, boiler systems, cooling towers, and desalination plants.

2, Why measure water hardness?

Measuring water hardness is important for several reasons, both practical and scientific. Here’s why it matters:

• Protecting Plumbing and Appliances

Scale Buildup: Hard water contains high levels of calcium and magnesium, which can deposit as scale in pipes, water heaters, and appliances.

Reduced Efficiency: Scale acts as insulation, making water heaters and dishwashers less efficient and increasing energy costs.

Shortened Lifespan: Appliances exposed to hard water often wear out faster.

• Health Considerations

Not Harmful, But… Hard water isn’t typically dangerous, but it can affect people with sensitive skin (e.g., eczema).

• Industrial Processes

Quality Control: Industries (e.g., textile, food processing, and pharmaceuticals) require controlled water hardness for consistent product quality.

Equipment Protection: Industrial boilers and cooling systems can be damaged by scale, leading to costly repairs.

• Environmental Impact

Detergent Use: Hard water requires more detergent and energy, which increases environmental load.

Water Treatment: Municipal and wastewater treatment plants may monitor hardness to adjust treatment processes.

• Aquatic Life and Agriculture

Fish and Plants: Some aquatic organisms are sensitive to water hardness, which affects breeding and survival.

Soil Chemistry: Hard water used for irrigation can alter soil pH and nutrient availability.

3, How is hardness measured?

Online Water Hardness Sensors

Modern industrial systems increasingly use online water hardness sensors for continuous monitoring. These sensors typically use ion-selective electrode (ISE) technology to detect calcium and magnesium ions in water.

Advantages include:

• Real-time monitoring
• continuous data output
• automatic process control
• integration with SCADA or PLC systems

Online sensors are widely used in industrial water treatment, power plants, desalination systems, and cooling towers.

4, What is the difference between hardness and alkalinity?

Water hardness and alkalinity are two important water quality parameters, but they measure different characteristics of water chemistry.

Water Hardness

Water hardness measures the concentration of divalent metal ions, mainly:

• calcium (Ca²⁺)
• magnesium (Mg²⁺)

Hardness mainly affects scale formation and equipment performance.

Alkalinity

Alkalinity measures the water’s ability to neutralize acids, which is primarily determined by the concentration of:

• bicarbonate (HCO₃⁻)
• carbonate (CO₃²⁻)
• hydroxide (OH⁻)

Alkalinity acts as a buffer that stabilizes pH levels in water.

Although hardness and alkalinity are different parameters, they are often related in natural water systems because both are associated with dissolved carbonate minerals.

For comprehensive water quality control, both parameters are commonly monitored together.

Tags: water hardness sensor, inline water hardness sensor, water hardness sensor price, online hardness analyzer, water hardness monitor, total hardness analyzer, water hardness analyzer, hardness sensor, continuous water hardness monitor, hardness analyzer, online water hardness analyzer, water hardness monitoring, hardness sensor for water treatment, calcium magnesium sensor, industrial water hardness measurement, boiler water hardness monitoring, cooling tower hardness sensor, real time water hardness monitoring, Suppliers, manufacturers, factory, wholesale, buy, price, quotation, bulk, for sale, companies, stock, cost.

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The post DS600 Online Water Hardness Sensor and Analyzer appeared first on Water Quality Sensors.

The DS2100 Multi-Parameter Water Quality Sensor is an integrated solution designed for real-time monitoring of critical water quality parameters within a single, compact device. It simultaneously measures parameters such as pH, dissolved oxygen, conductivity, turbidity, ORP, temperature, and more, delivering accurate and reliable data to support effective water quality management.

The main unit supports the connection of up to six probes, enabling simultaneous measurement of up to seven parameters. Equipped with an automatic self-cleaning brush, the DS2100 Multiparameter Sonde effectively cleans sensor surfaces, removes air bubbles, inhibits microbial fouling, and minimizes maintenance requirements, ensuring stable and dependable performance across a wide range of water environments.

Built with industrial-grade sensors and advanced digital signal processing technology, the DS2100 Multiparameter Probe offers high stability, fast response, and long-term reliability even under harsh operating conditions. Featuring a standard RS-485 communication interface, it allows seamless integration into SCADA systems, data loggers, and other control platforms. The DS2100 Multiparameter Water Quality Sondes are ideal for applications including wastewater treatment, drinking water monitoring, aquaculture, environmental monitoring, and industrial process control.

DS2100 Multiparameter Sonde Features

• Truly Integrated Multi-Parameter Water Quality Monitoring Platform

Utilizing a highly integrated design, a single device can simultaneously connect to 6 probes, enabling simultaneous monitoring of 7 key water quality parameters (connectable sensors include dissolved oxygen, conductivity, turbidity, pH, ORP, chlorophyll, oil-water mixture, ammonia nitrogen, etc.). This effectively reduces system complexity, lowers installation and maintenance costs, and meets the comprehensive water quality monitoring needs of various scenarios.

• Digital Sensing Architecture for More Stable and Reliable Data

The all-digital sensor design supports RS485 interface and MODBUS protocol, possessing excellent anti-interference capabilities. It is suitable for long-term stable data transmission in complex electromagnetic environments and easily connects to various monitoring platforms and data acquisition systems.

• Industrial-Grade Structural Design, Specifically Designed for Long-Term Underwater Operation

Equipped with a compact, streamlined stainless steel casing and high-grade sealing technology, it boasts excellent corrosion resistance and waterproof performance, ensuring stable sensor operation even during long-term underwater operation or in harsh environments.

• Enhanced Structural Connections for Improved Overall Reliability

By optimizing the connection structure between the probe and the main body, mechanical strength and vibration resistance are significantly improved, effectively reducing structural risks caused by water flow impact or long-term use.

• Optimized Anti-fouling Design for Long-Term Measurement Accuracy

An integrated automatic cleaning device periodically removes contaminants from the probe surface, inhibiting microbial adhesion, significantly reducing the impact of biological contamination on measurement results, extending maintenance cycles, and ensuring long-term data accuracy.

• Intelligent Calibration and Plug-and-Play Maintenance

All calibration parameters are stored internally in the sensor. Each probe uses an independent waterproof connector design, supporting quick plugging and unplugging and replacement. Maintenance does not require recalibrating the main unit, greatly improving on-site maintenance efficiency.

• Installation and Maintenance Design Optimized for Engineering Applications

A new dedicated mounting bracket effectively reduces the impact of water flow disturbance on measurement results; the exterior structure has been engineered for easy disassembly, cleaning, and on-site maintenance, reducing overall maintenance costs.

• Professional Solutions for Long-Term Online Monitoring

The overall design considers multiple dimensions, including structure, electronics, algorithms, and anti-fouling, and is specifically designed for long-term online, unattended water quality monitoring applications. It is suitable for various application scenarios such as rivers, lakes, reservoirs, sewage treatment, and industrial discharge outlets.

Technical Parameter

OPS Multi-parameter Water Quality Sensor Installation Cases

DS2100 Multiparameter Probe Installation

The DS2100 Multiparameter Probe supports flexible installation methods for different monitoring scenarios:

1. Fixed installation using mounting brackets
2. Suspended installation via integrated hook design
3. Integration into buoy systems, unmanned surface vehicles (USVs), and other automated platforms

The newly added mounting bracket helps maintain stable sensor positioning and minimizes data fluctuation caused by water flow.

Applications of DS2100 Multi-Parameter Water Quality Sensor

• Surface Water Monitoring (Rivers, Lakes, and Reservoirs)

Continuous measurement of key water quality parameters to assess pollution levels, ecological health, and long-term environmental trends in natural water bodies.

• Municipal Drinking Water and Wastewater Systems

Real-time monitoring in water supply networks, wastewater treatment plants, and discharge outlets to support process control, regulatory compliance, and operational optimization.

• Environmental Monitoring and Government Projects

Deployed in environmental protection programs and monitoring stations for large-scale, long-term data collection, supporting water quality assessment, early warning systems, and policy decision-making.

• Automated and Unmanned Monitoring Stations

Designed for integration into remote, unattended monitoring platforms, enabling reliable long-term operation with minimal maintenance requirements.

• Buoy-Based and Floating Monitoring Systems

Ideal for installation on monitoring buoys and floating platforms, providing stable multi-parameter measurements under dynamic water flow and changing environmental conditions.

• Aquaculture and Fish Farming Water Quality Management

Continuous monitoring of critical parameters to ensure optimal living conditions, improve productivity, and reduce disease risks in aquaculture ponds and fish farming facilities.

FAQs about Multi-Parameter Water Quality Sensor

1. What parameters can the multi-parameter water quality sensor measure?

The DS2100 Multi-Parameter Water Quality Sensor supports the simultaneous measurement of multiple water quality parameters, including dissolved oxygen (DO), pH, ORP, conductivity, turbidity, chlorophyll, oil-in-water, ammonia nitrogen, and temperature. The exact configuration depends on the selected probe combination.

2. How many probes can be connected at the same time?

The all-in-one design allows connection of up to six probes, simultaneously displays temperature, enabling measurement of seven parameters within a single compact sensor body.

3. What communication methods does the sensor support?

The sensor features a digital RS485 interface and supports the MODBUS protocol, making it easy to integrate with PLCs, data loggers, SCADA systems, and remote monitoring platforms.

4. Is the sensor suitable for long-term underwater and online monitoring?

Yes. The sensor is specifically designed for long-term online and underwater operation, featuring a stainless-steel housing, high-grade sealing, strong anti-interference performance, and an automatic cleaning system to ensure stable and reliable measurements over time.

5. How does the automatic cleaning system work?

The built-in automatic cleaning device periodically removes contaminants and biofouling from the probe surfaces. This helps prevent microbial growth, maintain measurement accuracy, and significantly reduce maintenance frequency.

6. Are calibration parameters stored in the sensor or the controller?

All calibration parameters are stored directly in each probe. This allows probes to be replaced or swapped without recalibrating the entire system, supporting true plug-and-play maintenance.

7. How easy is probe replacement and maintenance?

Each probe is equipped with an independent waterproof connector, allowing fast insertion and removal. The optimized exterior design and modular structure simplify on-site maintenance and servicing.

8. What materials are used for the sensor housing?

The sensor housing is made of high-quality stainless steel, providing excellent corrosion resistance, mechanical strength, and durability for use in harsh aquatic environments.

9. Can the sensor be installed in flowing or dynamic water conditions?

Yes. A newly designed mounting bracket minimizes the impact of water flow on measurements, ensuring stable and accurate data collection in rivers, channels, and buoy-based systems.

10. What are the power and maintenance requirements?

The sensor is optimized for low power consumption and long maintenance intervals. Combined with automatic cleaning and digital communication, it is well-suited for remote and unmanned monitoring installations.

11. Can the sensor be customized for specific applications?

Yes. Probe combinations, measurement parameters, cable length, and system integration options can be customized to meet specific project and application requirements.

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The chlorophyll sensor adopts the principle of fluorescence method. According to the spectral absorption characteristics of chlorophyll a, the water body is irradiated by a high-energy LED light source, and the chlorophyll a in the water body is excited to generate fluorescence of a specific wavelength, and the concentration of chlorophyll a in the water is measured.

Advantage:

The chlorophyll sensor of the fiber optic chlorophyll sensor provides excellent repeatability and stability, and is not susceptible to ambient light. With an automatic cleaning brush, it eliminates air bubbles, reduces the impact of contamination on measurement, makes maintenance cycles longer, and maintains excellent stability for long-term online use.

Features:

1. Digital sensor, RS-485 output, support MODBUS.
2. Automatic cleaning brush to prevent contamination and eliminate air bubbles.
3. Direct measurement is easier than traditional analysis methods.
4. Continuous online monitoring and real-time control of water quality.

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Our Turbidity Sensor use fiber optic technology to provide excellent repeatability and stability, and are not susceptible to ambient light. The automatic cleaning brush with sensor effectively eliminates air bubbles and reduces the influence of contamination on the measurement. It has a longer maintenance period and maintains excellent stability for long-term online use.

Features:

1. Digital sensor, RS-485 output, support MODBUS.
2. Our turbidity sensor feature an automatic cleaning brush to prevent contamination and eliminate air bubbles.
3. Strong anti-interference ability, not affected by ambient light and chromaticity.
4. 90° scattered light principle, using optical fiber technology, better repeatability.

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DS380 series of fluorescent dissolved oxygen sensors use a new generation of fluorescence lifetime technology and high-performance fluorescent materials. No oxygen consumption, No flow rate limitation, no electrolyte, no maintenance and calibration, no interference from hydrogen sulfide, and excellent stability. Built-in temperature sensor, automatic temperature compensation. An RS485 output can be networked without a controller.

Features of Dissolved Oxygen Sensor:

1. DO Sensor, RS485 output, supports MODBUS, which can realize networking and system integration without a controller.
2. There is no electrolyte, interference, or need for frequent calibration.
3. No oxygen consumption, no flow rate limit.
4. Built-in temperature sensor, automatic temperature compensation.
5. The water filter membrane, will not be attached to pollutants in the water.
6. Good stability, high measurement accuracy, and fast response.

Technical parameter:

Customer Cases in Aquaculture:

Applications of Optical Dissolved Oxygen Sensors:

A dissolved oxygen sensor is a sensing device used to measure the dissolved amount of oxygen in water. Dissolved oxygen sensors are widely used in aquaculture such as fish ponds, sewage treatment industry, hydrological monitoring, environmental monitoring, and in education and scientific research.

Application of Optical Dissolved Oxygen Sensors in Aquaculture

Dissolved oxygen is crucial for aquaculture as it directly affects the growth, health, and yield of fish and shrimp. Optical dissolved oxygen sensors enable real-time monitoring of oxygen levels in water, helping farmers optimize aeration strategies and prevent fish mortality due to oxygen depletion.

Application Scenarios:

-Real-time monitoring of dissolved oxygen levels to ensure an appropriate oxygen concentration (typically 4-8 mg/L).

-Automatic control of aeration equipment (such as aerators and aeration systems) to reduce energy consumption and improve farming efficiency.

-Predicting water quality changes to prevent diseases and mortality caused by low oxygen levels.

Advantages:

-No need for frequent calibration, reducing maintenance costs.

-Unaffected by water flow speed, suitable for both still and slow-moving water environments.

-Applicable to both saltwater and freshwater, meeting diverse aquaculture needs.

Application of Optical Dissolved Oxygen Sensors in Wastewater Treatment

During wastewater treatment, dissolved oxygen levels directly impact the efficiency of microbial degradation of organic matter. Optical dissolved oxygen sensors provide real-time monitoring of oxygen levels in aeration tanks and effluent outlets, optimizing aeration control and reducing energy consumption.

Application Scenarios:

-Dissolved oxygen monitoring in aeration tanks: Ensures that microorganisms effectively degrade organic matter, improving wastewater treatment efficiency.

-Energy-efficient aeration optimization: Prevents over-aeration, reducing energy costs (aeration is a major energy consumer in wastewater treatment plants).

-Effluent water quality monitoring: Ensures that discharged wastewater meets environmental protection standards.

Advantages:

-High resistance to pollution, suitable for wastewater with high turbidity and organic content.

-No need to replace electrolytes, reducing maintenance requirements.

-High stability, ideal for long-term continuous monitoring.

Application of Optical Dissolved Oxygen Sensors in Hydroponic Agriculture

Hydroponics is a soil-free cultivation technique where oxygen supply to plant roots is essential. Optical dissolved oxygen sensors help farmers optimize oxygen levels in nutrient solutions, promoting healthy plant growth.

Application Scenarios:

-Optimizing oxygen supply to enhance root respiration and improve nutrient absorption efficiency.

-Preventing root oxygen deficiency, reducing root rot and diseases, thereby increasing crop yield and quality.

-Automated hydroponic systems, integrating with IoT technology to enable smart irrigation and oxygen management.

Advantages:

-High accuracy and low drift, ideal for long-term hydroponic monitoring.

-Unaffected by the chemical composition of nutrient solutions, adaptable to various crops.

-Compatible with smart agriculture systems, allowing integration with automated control systems.

Application of Optical Dissolved Oxygen Sensors in Environmental Monitoring

Dissolved oxygen is a key indicator of water body health. Optical dissolved oxygen sensors are widely used in ecological monitoring, eutrophication assessment, and marine research.

Application Scenarios:

Monitoring of Rivers, Lakes, and Reservoirs:

-Tracking dissolved oxygen levels to assess ecological health.

-Predicting algal blooms and preventing eutrophication (e.g., cyanobacterial outbreaks).

-Evaluating the impact of industrial discharge on water quality.

Marine Monitoring:

-Studying oxygen distribution in seawater to understand ocean currents’ impact on ecosystems.

-Monitoring oceanic dead zones, and providing early warnings for marine ecological crises.

-Long-term monitoring using buoys, ROVs (Remotely Operated Vehicles), and AUVs (Autonomous Underwater Vehicles).

Drinking Water Source Monitoring:

-Ensuring water quality safety by detecting organic pollution levels.

-Combining with other sensors (e.g., pH, turbidity) for comprehensive water quality assessment.

Advantages:

-Suitable for long-term field monitoring (low power consumption, corrosion-resistant, and pollution-resistant).

-Data can be transmitted remotely, supporting IoT-based real-time monitoring.

-Unaffected by water flow speed, making it ideal for both still and flowing water environments.

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FAQs About Dissolved Oxygen (DO) Sensors:

Q1: Why is it important to measure dissolved oxygen in water?

Dissolved oxygen (DO) is critical for the survival of aquatic life, as fish and other organisms rely on oxygen in the water to breathe. Measuring DO helps assess water quality and ensures that oxygen levels are sufficient to support healthy ecosystems, wastewater treatment processes, and aquaculture operations.

Q2: What is the ideal dissolved oxygen level for fish?

The ideal dissolved oxygen level for fish generally ranges from 5 to 8 mg/L. However, this can vary depending on the species. Fish can survive in lower levels, but anything below 3 mg/L can stress fish and lead to suffocation, while levels above 10 mg/L are often unnecessary and could indicate excessive aeration.

Q3: What is a dissolved oxygen sensor?

A dissolved oxygen (DO) sensor is a device used to measure the concentration of oxygen dissolved in water. It is commonly used in environmental monitoring, aquaculture, wastewater treatment, and industrial processes to ensure oxygen levels are within required thresholds.

Q4: How Do Optical Dissolved Oxygen Probes Work?

Optical dissolved oxygen probes use a luminescent material that emits light when exposed to oxygen. When oxygen is present, it quenches the fluorescence of the material. By measuring the change in fluorescence, the sensor calculates the concentration of oxygen in the water. Optical probes are more durable and require less maintenance compared to electrochemical sensors.

Q5: How do you clean a dissolved oxygen sensor?

To clean a dissolved oxygen sensor:

Gently remove the sensor from the water.

For optical sensors, wipe the probe with a soft cloth to remove any fouling or debris.

Always refer to the manufacturer’s guidelines for specific cleaning instructions.

Q6: How Do You Calibrate a DO Sensor?

Calibrating a DO sensor typically involves:

Air calibration: Exposing the sensor to ambient air (which should be 100% saturated with oxygen) to set the 100% DO reading.

Zero calibration: For electrochemical sensors, this involves using a sodium sulfite solution or another oxygen-depleting method to create a zero DO environment for accurate calibration.

Q7: What is the Difference Between Optical and Electrochemical DO Sensors?

Optical Sensors: Use luminescence to measure DO levels without consuming oxygen. They are low-maintenance, have no electrolyte solution, and provide long-term stability.

Electrochemical Sensors: Use electrodes and electrolyte solutions to measure oxygen levels. These sensors require regular calibration, membrane replacement, and electrolyte refills but are often more cost-effective.

Q8: What Are Common Applications of DO Sensors?

DO sensors are used in:

Aquaculture: To monitor oxygen levels for healthy fish and other aquatic organisms.

Wastewater treatment: Ensuring proper oxygen levels for biological processes.

Environmental monitoring: Measuring oxygen levels in rivers, lakes, and oceans to assess water quality.

Industrial processes: In fermentation, brewing, and other production processes, oxygen levels must be controlled.

Q9: How Long Does an Optical DO Sensor Last?

Optical DO sensors can last several years, with typical lifespans ranging from 3 to 5 years depending on usage and maintenance. They are more durable than electrochemical sensors and require less frequent servicing.

Q10: How Often Should an Optical DO Sensor Be Maintained?

Optical sensors require minimal maintenance, usually needing cleaning and occasional recalibration every few months or as recommended by the manufacturer.

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