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DS510 Online pH Sensor Probe and Portable pH Meter for Water Quality Monitoring

DS510 Online pH Sensor Probe & Portable pH Meter

The digital pH sensor adopts composite electrode technology. The sensor has a built-in temperature sensor, which automatically compensates the temperature. The composite electrode has a longer life and is suitable for online long-term monitoring environments. The sensor adopts RS-485 output and Modbus protocol, which can realize networking and system integration without a controller.

The pH sensor uses compound electrode technology for a long service life.
Not affected by transmission distance, good stability.
Built-in temperature sensor, automatic temperature compensation.
Network integration is possible without a controller.

0~14Measurement range

±1% FSAccuracy

IP68Waterproof level

RS-485Modbus output

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Datasheet

Technical Parameters & Specifications

Technical Parameter
Product Name	Digital pH Sensor
Model	DS510
Detection principle	Composite electrode
Measurement range	0~14
Measurement accuracy	±1% FS
Resolution	0.01
Temperature range	0~50℃
Stored temperature	0~60℃
Output signal	RS-485, MODBUS protocol
Calibration method	3 point calibration
Specifications
Waterproof level	IP68
Under pressure	1 bar
Product material	POM
Product size	∅25×198 mm
Power information	DC 6~12V, current <50mA
Cable length	Standard 5 meters, longer can be customized

Applications

Application Areas of Water pH Sensor

Water pH sensors are used across a wide range of industries and applications where monitoring the acidity or alkalinity of water is critical.

Environmental Monitoring

Surface water and groundwater: monitoring pH in rivers, lakes, and aquifers to detect pollution or acidification. Oceanography: measuring ocean pH to study climate change effects, like ocean acidification.

Drinking Water Treatment

Water treatment plants: ensuring water pH is within safe ranges for human consumption. Distribution networks: monitoring to prevent pipe corrosion or scaling due to imbalanced pH.

Wastewater Management

Industrial and municipal wastewater: compliance with environmental regulations; controlling pH before discharge or reuse. Neutralization processes: managing pH during chemical treatment stages.

Agriculture & Hydroponics

Irrigation water: ensuring optimal pH for plant nutrient uptake. Hydroponic systems: maintaining ideal growing conditions for crops.

Aquaculture & Fisheries

Fish farms: keeping water pH within ranges suitable for different aquatic species. Water quality control: preventing stress or death in aquatic organisms due to pH imbalance.

Chemical & Pharmaceutical Industries

Process control: maintaining specific pH levels during chemical reactions or drug manufacturing. Quality assurance: testing the pH of water used in formulations.

Swimming Pools

Water safety: regular pH monitoring to ensure user safety and effectiveness of disinfectants (like chlorine).

FAQs

Frequently Asked Questions

What is a pH Sensor?

A pH sensor is a device that measures the hydrogen ion concentration (H⁺) in a solution, indicating its acidity or alkalinity. The term “pH” stands for “potential of hydrogen”, and it ranges from 0 (very acidic) to 14 (very alkaline), with 7 being neutral.

A pH sensor typically consists of a glass electrode (measures H⁺ ion activity) and a reference electrode (provides a stable voltage for comparison).

What is the Working Principle of a pH Sensor?

A pH sensor works based on electrochemical potential differences. The glass electrode has a special membrane that allows hydrogen ions from the test solution to interact with it, while the reference electrode remains constant in voltage.

When immersed in a solution, the difference in voltage (or potential) between the glass electrode and reference electrode is measured. This voltage difference is proportional to the pH of the solution (based on the Nernst Equation). The sensor outputs a signal (millivolts) that is then converted to a pH value.

Why Measure pH in Water?

Measuring pH in water is important because pH affects chemical behavior, biological activity, and safety:

• Drinking water quality: ensures it’s safe for human consumption (pH ~6.5–8.5)
• Industrial processes: pH affects reactions, corrosion, and product quality
• Environmental protection: monitors pollution and ecological balance in natural water bodies
• Aquaculture: fish and aquatic species require specific pH ranges
• Agriculture: plant nutrient availability is pH-dependent
• Swimming pools: disinfectants like chlorine work best at certain pH levels

How to Choose a pH Sensor?

Choosing the right pH sensor depends on several factors: application (industrial, lab, field use, food, etc.), pH range (usually 0–14), temperature compatibility (use sensors with temperature compensation if needed), chemical resistance, maintenance (some sensors are low-maintenance or self-cleaning), accuracy and resolution, installation type (inline, submersible, or benchtop), response time, and calibration method (manual or automatic).

Tip: For harsh or industrial environments, look for rugged sensors with long lifespan and integrated temperature compensation (e.g., combined pH/temperature probes).

Why Must pH Electrodes (pH Probes) Be Soaked Before Use?

The pH electrode must be soaked before use, because the pH bulb is a special glass membrane, there is a very thin hydrated gel layer on the surface of the glass membrane, it can only form a stable H⁺ layer on the surface of the membrane after sufficient soaking, in order to have a stable and good response with the H⁺ in the solution. If the soaking is not sufficient, the response value will be unstable and drift during the measurement. The soaking time is generally 24 hours or more.