The OPS UV Fluorescence Non-contact DSOD703 Oil Spill Detector is a non-contact sensor designed for real-time detection of oil on water. It uses oil’s natural fluorescence to detect oil and alerts you to unsuspected oil spills immediately. It provides 24/7 industrial and environmental water monitoring at effluent discharge or influent intake points.

DSOD703 Oil Spill Detector Monitorable Oils

Automotive motor oil, turbine oil, fuel oil, marine diesel, crude oil, civilian fuel oil, lubricants, mineral oils(non-synthetic), and so on.

DSOD703 Oil Spill Detector Measuring Principle – UV Fluorescence Technology

The OPS DSOD703 Oil Spill Detection and Monitoring Sensor System can detect a 1 μm-thick oil layer on the water’s surface at distances of 0-10 meters above it.

The Oil Spill Detection Sensor emits UV pulses onto the water surface or the ground, stimulating oil molecules in the target area to fluoresce. Utilizing the inherent fluorescent properties of these oil molecules, it identifies their chemical composition and sends an early warning signal to the operator.

DSOD703 Oil Spill Detector Installation Cases

You can see the value of oil spill detectors in real-world settings. The table below highlights successful applications in different countries:

Case Study 1: Installation in Sewage Channels, Russia

In an industrial wastewater system in Russia, the OPS DSOD703 oil spill detector was deployed above sewage channels to address long-standing risks of hydrocarbon contamination. This project demonstrates that the DSOD703 is not limited to open-water environments—it is equally effective in wastewater channels, drainage conduits, and industrial effluent pathways. This Russian deployment significantly enhanced operational visibility for wastewater treatment personnel, enabling them to manage pollution risks more effectively and maintain environmental compliance.  ( Read more info: https://opticaldosensor.com/desun-uniwill-dsod703-oil-spill-detector-installed-in-sewage-channels-in-russia/ )

Case Study 2: Coastal Oil Depot in Hainan

A major coastal oil storage facility in Hainan implemented the DSOD703 to strengthen its environmental safety measures. Positioned above the water near loading zones, the system provides continuous real-time monitoring. Operators now receive instant alerts at the earliest signs of oil leakage, enabling containment before the spill spreads. The depot reports a significant improvement in operational environmental compliance and risk reduction. ( Read more info: https://opticaldosensor.com/desun-uniwill-dsod703-non-contact-oil-spill-detector-installed-at-coastal-oil-depot-in-hainan/ )

Case Study 3: Underground Diesel Storage Tank Leak Monitoring

Even small leaks from underground diesel storage tanks can migrate through soil and eventually reach drainage systems or groundwater, causing costly environmental damage and regulatory challenges. To strengthen its leak-detection capability, they deployed OPS DSOD703 Oil Spill Detectors as part of its early-warning monitoring system.

The DSOD703 units were installed above inspection wells and drainage collection channels connected to the underground diesel tank containment area. This configuration enables the detector to continuously monitor the presence of oil on water surfaces within the drainage infrastructure. If leaked diesel reaches the monitoring points, the sensor immediately detects the oil film and triggers an alarm signal to the facility’s control system.

This case demonstrates that the DSOD703 is effective in open water bodies, wastewater channels, and coastal oil facilities, and that it serves as a reliable safeguard for underground fuel storage systems. By integrating oil-on-water detection at drainage and inspection points, industrial operators can establish a practical, cost-effective early-warning network for monitoring diesel storage leaks. ( Read more info: https://opticaldosensor.com/desun-uniwill-dsod703-oil-spill-detectors-installed-on-overseas-diesel-storage-project/ )

Case Study 4: DSOD703 Oil Spill Monitoring & Alarm Systems for Desalination

In a seawater desalination facility in the United Arab Emirates, the OPS DSOD703 oil spill detector was installed near seawater intake channels and drainage areas to monitor potential oil contamination from pumps, generators, or maintenance activities. The system continuously monitors the water surface in real time. It triggers immediate alarms when oil films are detected, allowing operators to respond quickly and prevent contamination from entering the desalination process. This deployment significantly improved environmental protection, operational safety, and regulatory compliance while safeguarding critical desalination equipment and surrounding coastal ecosystems. ( Read more info: https://opticaldosensor.com/desun-uniwill-dsod703-oil-spill-monitoring-alarm-systems-installed-in-seawater-desalination-plants-in-the-uae/)

You can trust these solutions to deliver real-time data, improve response, and support both environmental and economic goals.

Technical Parameter

Features and Benefits of Oil Spill Detectors

• Long-distance Non-contact Detection Sensor

With non-contact optical monitoring technology, the sensor is unaffected by marine biofouling or oil contamination, requiring no cleaning or maintenance and easier installation. Long-distance detection of oil, with a maximum monitoring distance of 10m above the water surface.

• High Sensitivity

Using UV LED light to excite the oil’s native fluorescence, the sensor can detect oil films as thin as 1 µm, minimizing false alarms.

• Online 24/7 Monitoring

24-hour continuous real-time monitoring, no daytime or nighttime limitations.

• IP68 Waterproof Rating

Rugged IP68-certified sealed design for harsh environments.

• Long Lifetime

Lifetime (>2 years), built-in system calibration, maintenance-free, low power operation (< 10W).

• RS485 Output Signal

The Oil Spill Detection System is equipped with an RS-485 interface that enables fast, easy sensor configuration via Modbus. It can be easily connected to the monitoring system. DSMC5100 can be equipped with it to read real-time monitoring data, and the data storage function provides users with a basis for analyzing the data.

Application Areas of Non-contact Oil Spill Monitoring System

• Waste Water

Monitors oil contamination in wastewater treatment facilities, ensuring compliance with environmental standards.

• Hydro Dam

Detects oil leaks from machinery and equipment, helping to prevent contamination in hydroelectric power reservoirs.

• Airports

Provides continuous monitoring for potential fuel and oil leaks in airport water runoff, protecting surrounding ecosystems.

• Oil Refinery

Enables early detection of oil spills and leaks in refineries, improving environmental safety and operational efficiency.

• Shipping Ports & Harbor

Monitors waterways for accidental oil spills, enabling immediate response and pollution control in busy port areas.

• Manufacturing

Helps detect oil leaks in industrial settings, reducing environmental impact and ensuring cleaner operations.

• Oil Platform

Continuously monitors offshore oil platforms to detect spills and leaks in real-time, minimizing ocean contamination risks.

• Powder Plant

Detects oil leaks in powder production facilities, reducing contamination risks in sensitive production areas.

• Drinking Water

Monitors sources of drinking water to ensure they remain uncontaminated by oil, safeguarding public health.

• Irrigation Canal

Ensures that irrigation channels remain free of oil pollutants, protecting agricultural water quality.

• Fuel Depot

Monitors storage and handling areas at fuel depots, detecting leaks before they impact the environment.

• Aquaculture

Detects oil contamination in aquaculture facilities, protecting water quality for aquatic farming.

Installation Diagram Reference of Non-contact Oil on Water Detection System

Comparison Table of Oil In Water Sensor and Oil Spill Detector

FAQs

1. What types of oil can the OPS Oil Spill Detector detect?

The OPS Oil Spill Detector is primarily used for testing industrial oils and cannot measure animal, vegetable, or synthetic oils. It supports testing of crude oil, diesel oil, lubricating oil, kerosene, and other industrial oils.

2. Can the oil spill monitor test the thickness of the oil film on the water surface? How thick can it be tested?

The oil spill detector primarily operates by detecting the fluorescence of petroleum-based substances, recognizing and quantifying the oil film through spectral excitation and signal analysis. Simply put, oil spill monitors cannot directly tell people the exact thickness of the water surface. It can only use the strength of the fluorescent signal reflected from the oil film to determine the amount of leakage, roughly.

We briefly divide the process into three steps:
Step 1: The detector adopts a 365nm UV pulsed LED, which vertically
irradiates the water surface and stimulates the oil film to produce fluorescence.
Step 2: The oil is excited to emit **400-650nm fluorescence** (the peak value varies with the type of oil; for crude oil, about 480nm; for light oil, about 420nm).
Step 3: The detector converts fluorescence data into oil spill alarms or concentration values using signal processing and classification algorithms.

3. What is the thickness or the sensitivity of the oil film that can be detected?

Mainly for oil films floating on the surface of water or the ground, the detection sensitivity is up to 1 micron in thickness (equivalent to 1 liter of oil spreading over 1000 square meters of water).

4. What about anti-interference performance?

Like flowing leaves in the water, plastic, water plants, etc. Non-petroleum substances (e.g., algae, organic debris) have different fluorescence properties and can be excluded from interference by spectral filtering and algorithms. In combination with our controllers, we can set up data to exclude such substances.

5. What is the Temperature limitation of the use environment?

0~60 degrees Celsius.

6. Is it disturbed by sunlight, and is it specially treated during installation?

It will be affected a little bit, so when installing it, we recommend equipping it with a light-avoiding Protective Shell. Of course, it is possible not to use it, but if we want to get a more perfect detection, the light shield will be very useful.

7. Why is detecting oil leaks early important?

Detecting oil leaks is essential for environmental, operational, and safety.

-Environmental Protection
Preventing Ecological Damage: Oil spills can devastate marine and terrestrial ecosystems, affecting plants, animals, and water quality.
Early Detection Minimizes Spread: Sensors can detect spills early, reducing the area affected and enabling quicker response to protect vulnerable habitats.

-Compliance with Regulations
Governments and environmental agencies enforce strict regulations on pollution and spill management. Sensors help organizations monitor and report compliance in real-time.

-Emergency Response
Early detection reduces risks to personnel and infrastructure by initiating containment measures promptly.

-Reducing Cleanup Costs
Early detection of spills limits the spread, significantly reducing cleanup costs.

Deploying oil spill detection sensors is a proactive measure to balance industrial operations with environmental stewardship and regulatory adherence.

8. Where should Non-contact Oil Spill Detectors be installed?

-Detecting oil storage leaks to prevent industrial plant accidents;
-Monitoring oil leaks in wastewater flowing into a wastewater treatment plant;
-Monitoring oil spills into rivers;
-Monitoring oil spills that are entering waterways;
-Oil leak detection in food or pharmaceutical production processes;
-Monitoring oil leaks at specific locations;
-Installation in locations where contact oil detection equipment is difficult to install;
-Manufacturing process requiring control of oil content;
-Places where sleep oil monitoring is required;
-Where surface oil monitoring is required;
-Areas where unmanned oil monitoring is needed in industrial settings.

9. In what situations are oil leaks or spills likely to occur?

Oil leaks or spills can occur in various situations, often due to technical failures, operational errors, environmental factors, or unforeseen accidents. Here are the primary situations where oil leaks or spills are likely:

-Industrial Operations
Pipeline Ruptures: Damage due to corrosion, wear and tear, or external impacts.
Tank and Storage Failures: Structural issues or improper maintenance of oil storage tanks.
Refining and Processing Facilities: Equipment malfunctions or accidents during oil refining and transfer.
Machinery Leaks: Oil leaks from industrial equipment, pumps, or generators.

-Transportation
Marine Oil Spills: Tanker accidents, collisions, or groundings in oceans or rivers.
Pipeline Transportation: Leaks due to pressure changes, corrosion, or natural events.
Rail or Road Transport: Accidents involving vehicles carrying oil or fuel.
Air Transport: Leaks from aircraft fuel systems or during refueling operations.

-Offshore Drilling and Production
Blowouts: Uncontrolled releases of oil or gas during drilling operations.
Platform Failures: Structural damage to offshore rigs or production facilities.
Subsea Equipment Issues: Leaks from underwater pipelines, wellheads, or valves.

-Storage and Handling
Improper Handling: Errors during loading, unloading, or transferring oil.
Aging Infrastructure: Leaks from old or poorly maintained storage systems.
Tank Overfilling: Spills caused by human or mechanical errors during filling.

-Human Error
Operational Mistakes: Incorrect procedures during oil processing or transport.
Negligence: Failing to perform routine maintenance or follow safety protocols.
Spill Containment Failures: Lack of proper systems or oversight to control spills.

10. Who can benefit from using a Non-contact Oil Spill Detection Sensor Instrument?

-Port and coastal agencies, oil companies, ship owners, and oil spill response organizations.
-Anybody who requires reliable round-the-clock oil spill surveillance, support for fast and efficient recovery of oil spills, and efficient deployment of boom and skimmers.
-Oil spill response vessels.

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The post Non-contact DSOD703 Oil Spill Detector appeared first on Water Quality Sensors.

OPS DS530 Online Oil in Water Sensor is a complete solution for oil in water measurements in the waste water. The oil in water sensor adopts the principle of ultraviolet fluorescence analysis, has high sensitivity, and can detect soluble and emulsifiable oils. In addition, the self-cleaning brush version can be selected to effectively eliminate the influence of oil pollution on the measurement. It is suitable for a variety of water quality measurement scenarios such as oilfield monitoring, industrial circulating water, condensate, wastewater treatment, and surface water stations.

Measuring Principle of DS530 Fluorescence Oil in Water Sensor

The ultraviolet fluorescence method is used to monitor the concentration of oil in the water, and the oil concentration in the water is quantitatively analyzed based on the fluorescence intensity emitted by the petroleum and its aromatic hydrocarbon compounds and compounds containing conjugated double bonds after absorbing ultraviolet light. The aromatic hydrocarbons in petroleum can produce fluorescence under the excitation of ultraviolet light, and the value of oil in water can be calculated according to the intensity of the fluorescence.

Features of Online Oil in Water Probe

-Digital sensor, RS-485 output, support MODBUS;

-With automatic cleaning brush to eliminate the impact of oil on the measurement;

-Eliminate the effects of ambient light on measurements with unique optical and electronic filtering techniques;

-Unaffected by suspended solids in water.

Technology Parameter

Applications of Oil in Water Monitor

-Drinking water

-Wastewater

-Process measurement and control technology

-The environmental monitoring

-Heat Exchanger Leak Detection

-Oil Tank Leakage Detection

-Intake Water Monitoring

-Reinjection Water Monitoring

-Industrial Wastewater Monitoring

-Marine Discharge Monitoring

-Plant Runoff / Storm Water Monitoring

Oil Measured by OPS Oil in Water Detection Sensor 

-Marine Diesel Engine

-Heating Oil

-Lubricating Oil

-Hydraulic Oil

Mineral Oil

-Diesel

-Petrol Diesel

-Fuel oil

OPS Oil in Water Sensors Use sites

Customer Comment

Comparison Table of Oil In Water Sensor and Oil Spill Detector

FAQs

1. How does an online oil-in-water sensor work?

For Fluorescence-based oil in water sensors: These sensors utilize fluorescent molecules that emit light when excited by a specific wavelength of light. When oil or hydrocarbons are present in water, they interact with the fluorescent molecules, causing a change in the emitted light’s intensity or wavelength. By measuring this change, the sensor can determine the oil concentration in the water.

The sensor typically consists of a probe or sensor head that is immersed in the water sample. This probe contains the necessary components for detecting and measuring the presence of oil. The data collected by the sensor can then be analyzed to determine the oil concentration in the water.

2. Why do we need to monitor oil in water?

Oils and hydrocarbons are often a major component of a variety of products, from fuels to solvents to the many chemicals used in industry during processing. In industrial production, some of these hydrocarbons, oils, and solvents can leak into sewers or, worse, directly into the environment. Similarly, domestic and agricultural fuel storage can lead to accidental spills into waterways and aquifers. In the oil industry, one ton of oil spilled can quickly spread over an oil slick covering an area of approximately 10,000 sq. m. Oil in water sensors and analyzers can be useful by giving early warning of problems as they occur.

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The post DS530 Online Oil In Water Sensor 0-200ppm & 0-5ppm appeared first on Water Quality Sensors.

OPS is delighted to introduce its newly developed DS810 PAH Sensor. The PAH Probe is a fluorimeter that accurately and continuously measures the concentration of Polycyclic Aromatic Hydrocarbons (PAHs) in water. These PAHs result from the incomplete combustion of petroleum and are present in most mineral oils or fuels. The sensor measures the total amount of PAHs passing through the lens, detecting and reporting PAHs from 0 to 1000 ppb (µg/L).

OPS PAH Measurement Sensor operates on the principle of UV fluorescence, which is much more sensitive than the conventionally used infrared scattering or absorption method. This enables the determination of even the slightest traces of PAHs, for example, in drinking and cooling water condensates. Application areas include the petrochemical industry, leakage detection in cooling and wastewater streams, and environmental monitoring. The Fluorescence PAH Analyzer can be used stationarily in shafts, flow, and pipelines. PAH probes connect to controllers for data display and recording. It features an RS-485 interface that allows easy and fast sensor configuration via Modbus.

Technical Parameter

PAH Sensor Measuring Principle

The measuring principle is based on the fluorescent properties of PAHs. Mineral oils rich in aromatic content will fluoresce when illuminated with ultraviolet light. The intensity of this fluorescence depends on the polyaromatic hydrocarbon (PAH) content of the oil. Typical oils that fluoresce include fuel oil, crude oil, hydraulic oil, and transformer oil. Each oil has its unique fluorescence intensity resulting from its specific PAH content. PAHs are integral parts of most mineral oil products and are a very specific indicator of oil contamination in water bodies and process water.

After excitation caused by a UV light source, PAHs emit light with longer wavelengths after a short time delay. The intensity of this light is measured and is proportional to the concentration of the PAHs. This measuring principle is considerably more sensitive than absorption and scattered light measurement. It is possible to detect even the slightest trace of PAH contamination in water. OPS PAH Sensor is a fiber-optic probe-based oil-in-water monitor. Fluorescence measurement assures continuous monitoring of oil and hydrocarbon contamination in water.

Features of the DS810 PAH Sensor

• PAH Measurement Range: 0 – 1000 ppb (µg/L)
• Equipped with an RS-485 interface that enables simple and quick sensor configuration via Modbus
• In situ measurement, no sampling no reagents
• Installations on the inlet and outlet of the scrubber
• Fluorescence probe for PAH/Oil in water measurements
• Corrosion-free Housing
• Detects oil in water through UV fluorescence
• Real-time in-line measurement
• Simple installation and operation

Advantages of DS810 PAH Probe

• Allowing for uninterrupted monitoring
• High Sensitivity with Low Cost
• Very High Accuracy
• Compliant with current IMO regulations
• Precisely measure hydrocarbons in water around oil wells
• Continuous PAH oil-in-water monitoring for the right price
• Minimal Maintenance
• High Sensitivity and Selectivity
• High Technology at a low price
• Fast Response Time
• Optical window with coating to minimize clogging

Cases of OPS PAH sensors for Marine Scrubbers Wash Water Monitoring System

Demand Background of PAH Sensor

Exhaust emissions from ships’ engines using heavy fuel oils release gases and particulates that can harm human health and the environment. To mitigate this pollution, the IMO established regulations through the Marine Environment Protection Committee (MEPC). Ships are now required to decrease emissions of nitrogen dioxide (NOx), sulfur dioxide (SOX), and particulates. To comply with the 2020 sulfur limit of 0.5%, the shipping industry is implementing various strategies, such as installing Exhaust Gas Cleaning Systems (scrubbers) to neutralize sulfur. Any discharge into the environment must be monitored to ensure it doesn’t contain harmful substances. Ships must install monitoring systems and ensure they perform comprehensive regulatory analysis, as mandated by the IMO, including testing for PAH, pH, turbidity, and temperature. This ensures accurate and robust measurements are conducted in line with regulatory requirements.

Now, Real-time detection may be possible with a new polycyclic aromatic hydrocarbon sensor (PAH), developed by OPS. The fluorescence PAH sensor accurately measures the PAH concentration in the inlet and outlet of marine gas scrubbers (ECGS), offering all the benefits of the digital sensor technology. With PAH sensors, precise and real-time data is possible and can be monitored — and acted upon — by operators on ocean rigs.

PAH Testing Purpose

1. Trace oil in water
2. Leak detection
3. Oil Spill Monitoring
4. Water Quality Monitoring
5. Hydrocarbons monitoring in water
6. Oil in Water Monitoring

PAH Monitoring Medium

1. Ballast Water
2. Discharge Water
3. Industrial Wastewater
4. Drinking Water
5. Washing Water
6. Cooling water & condensate return
7. Process water (refineries, desalination plants)
8. Rainwater (airport runoff monitoring)

Application Areas of PAH Sensor

• Monitoring drinking water resources
• Biological wastewater treatment plant protection
• Control of industrial discharges and wastewater
• PAH measurement in processed water
• Protection of membranes in desalination plants
• Control of washing water from purifiers on ships
• Marine ship Scrubber wash water monitoring
• Pipeline monitoring
• Bilge water monitoring
• Outflow detection in cooling condensates
• Environmental monitoring
• Petrochemical
• Wastewater monitoring
• Fuel detection in natural waters and sewage plants
• Gas Station/Refinery
• Bottom Water Monitoring
• Smoke Scrubbing
• Desalination device
• Airport Monitoring
• Maritime EGCS (Scrubber)
• Exhaust gas cleaning systems (EGCS) wash water monitoring
• Supervision and online control of fresh water in waterworks and boreholes
• Monitoring of wastewater in industrial and municipal sewage works
• Crude oil detection and leakage control at offshore oil pipelines
• Exhaust gas wash water monitoring

Benefits of Using a PAH Sensor

1, Early Detection and Prevention:

PAH sensors contribute to early detection and prevention of environmental pollution, allowing for proactive measures to mitigate potential damage. This leads to more effective pollution control strategies.

2, Cost-effective and Time-saving:

Compared to traditional lab-based analysis, PAH sensors offer a cost-effective and time-saving solution. Rapid data collection and analysis reduce operational costs and expedite decision-making processes.

3, Real-time Risk Assessment:

The real-time capabilities of PAH sensors enable immediate risk assessment. This empowers decision-makers to respond promptly to emerging environmental threats and implement targeted interventions.

4, Regulatory Compliance and Environmental Protection:

Employing PAH sensors supports regulatory compliance, ensuring that industries adhere to environmental standards. This, in turn, contributes to broader environmental protection efforts, fostering sustainable practices.

For any interest, freely contact sale@dshech.com for a quote.

Installation of PAH Sensor

FAQ About PAH Sensor

1. What is a PAH sensor?

A PAH sensor, which stands for Polycyclic Aromatic Hydrocarbon sensor, is a device used to detect the presence and concentration of polycyclic aromatic hydrocarbons in a given environment. Polycyclic aromatic hydrocarbons (PAHs) are organic compounds composed of multiple fused aromatic rings, and they are often found as pollutants in the environment due to incomplete combustion of organic materials such as coal, oil, gas, and wood. PAH sensors typically utilize various detection techniques such as spectroscopy, chromatography, or electrochemical methods to quantify PAH levels. These sensors are important tools in environmental monitoring, particularly in assessing air and water quality, as PAHs are known to be carcinogenic and can have harmful effects on both human health and the environment.

2. Why monitor PAH as a proxy for oil?

The EGCS Guidelines don’t request monitoring of PAH content specifically; rather, they focus on oil. However, the challenge lies in monitoring oil content well below 15 ppm continuously. Traditional oil-in-water sensors didn’t seem promising. Hence, an alternative approach emerged: using PAH sensors. These sensors can detect very low “oil” content, leveraging the presence of PAH compounds in oil.

3. Why monitor PAH in wash water?

Exhaust emissions from ships’ engines using heavy fuel oils release gases and particulates that can be detrimental to human health and the environment. In response, the IMO, through the Marine Environment Protection Committee (MEPC), established regulations to mitigate this pollution. Ships are now required to reduce nitrogen dioxide (NOX), sulfur dioxide (SOX), and particulate emissions. To comply with the 2020 sulfur limit of 0.5%, the shipping industry is adopting strategies, including installing Exhaust Gas Cleaning Systems (scrubbers) to neutralize sulfur. However, any discharge into the environment must be monitored to ensure nothing harmful is released. Therefore, ships need to install monitoring systems and ensure they perform the full regulatory analysis mandated by the IMO. This includes monitoring parameters such as PAH, pH, turbidity, and temperature to ensure robust and accurate measurements are made by regulatory requirements.

4. What are PAHs?

Polycyclic aromatic hydrocarbons (PAHs) constitute a large group of organic compounds with two or more fused aromatic rings. They occur naturally in petroleum and are also produced as by-products of fuel combustion.

PAHs represent an important class of environmental contaminants that are known to accumulate in ecosystems. The US EPA has identified 16 PAH compounds as priority pollutants. Some of these compounds are carcinogenic and/or mutagenic to mammals. Moreover, they exhibit both acute toxicity and sub-lethal effects on certain aquatic organisms. PAHs may also bio-accumulate in edible shellfish, providing a pathway to humans.

One source of PAHs is the incomplete combustion of fuel oils. Although engines and boilers are designed to optimize fuel combustion, exhaust gases inevitably contain a proportion of incompletely combusted material. This results in gaseous hydrocarbon and particulate emissions ranging from methane to very large complex molecules, including polycyclic aromatic hydrocarbons. While low molecular weight PAHs are primarily found unbound in the gaseous phase of the exhaust stream, heavier molecular weight PAHs constitute a group of substances that bind onto soot created during combustion.

5. How do you measure PAH in water?

Gas Chromatography-Mass Spectrometry (GC-MS):
This is one of the most widely used techniques for PAH analysis. GC separates the different PAH compounds based on their chemical properties, and MS detects and quantifies them based on their mass-to-charge ratio.

High-Performance Liquid Chromatography (HPLC):
HPLC can also be used for PAH analysis, especially when coupled with fluorescence or UV-visible detection methods. HPLC separates PAH compounds based on their affinity for the stationary phase.

Liquid Chromatography-Mass Spectrometry (LC-MS):
LC-MS combines the separation power of liquid chromatography with the detection capabilities of mass spectrometry. It can be effective for analyzing PAHs in complex matrices.

Thin-Layer Chromatography (TLC):
Although less commonly used for quantitative analysis, TLC can be used for qualitative screening of PAHs in water samples.

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Success Case of OPS PAH Sensors used for Exhaust Gas Cleaning System (EGCS)

Why do exhaust gas cleaning systems (EGCS) need a PAH measurement sensor?

PAH sensors can be employed in marine scrubber systems(MS-SOx) for several purposes 

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The post DS810 PAH Sensor Analyzer for Marine Scrubbers (EGCS) Wash Water Monitoring System appeared first on Water Quality Sensors.

The DS530 immersion oil-in-water probe utilizes advanced UV fluorescence measurement technology for continuous online monitoring of oil concentration in water. This technique detects the characteristic fluorescence emitted by oil compounds under ultraviolet excitation, providing high sensitivity and strong selectivity for oil contaminants. Compared with conventional infrared scattering or absorption methods, UV fluorescence offers superior trace oil detection capability and improved resistance to interference.

An optional automatic self-cleaning brush system effectively removes air bubbles and fouling from the probe surface during operation, minimizing environmental influences on measurement accuracy. This significantly extends maintenance intervals and ensures excellent long-term stability and repeatability under continuous online operation.

With fast response and reliable performance, the DS530 oil in water analyzer enables early detection and warning of oil contamination, supporting water quality management and process optimization.

Working Principle

The oil content in water is measured using the ultraviolet fluorescence method. When exposed to ultraviolet (UV) excitation, oil components—particularly aromatic hydrocarbons and compounds containing conjugated double bonds—absorb UV energy and emit characteristic fluorescence.

The intensity of the emitted fluorescence is directly related to the concentration of oil present in the water. By detecting and analyzing this fluorescence signal, the sensor performs a quantitative determination of oil concentration. Through calibrated signal processing, the measured fluorescence intensity is converted into an accurate oil-in-water concentration value.

Since aromatic hydrocarbons are a primary source of fluorescence in petroleum products, the UV fluorescence technique provides high sensitivity, strong selectivity, and excellent suitability for trace oil detection, making it well-suited for continuous online monitoring of oil contamination in water.

Technical Parameter

Online Oil-in-water Sensor Features

Using the principle of fluorescence. Compared with several commonly used methods, the fluorescence method is more efficient, faster, and can be monitored online in real time.

• Digital sensor, RS-485 output, supports MODBUS.
• Withan automatic cleaning brush to eliminate the impact of oil on the measurement.
• Eliminate the effects of ambient light on measurements with unique optical and electronic filtering techniques.
• Unaffected by suspended solids in water.

Installation Cases

An Oil-in-water Monitoring System is suitable for water quality monitoring scenarios such as oil quality monitoring, industrial circulating water, condensate water, wastewater treatment, and surface water stations.

Applications of Oil-in-Water Sensors

Oil Content in Water Analyzers are widely used for continuous monitoring and early detection of oil contamination in various water systems, including:

• Industrial Circulating Water Systems
  Monitoring oil leakage in cooling water and closed-loop circulation systems to protect equipment and ensure stable operation.

• Condensate and Boiler Feedwater Monitoring
  Detecting oil ingress in condensate return lines to prevent contamination of boilers and heat exchangers.

• Wastewater Treatment Plants
  Measuring oil content in influent, effluent, and process streams to support treatment efficiency and regulatory compliance.

• Oil & Gas Industry
  Monitoring produced water, oily wastewater, and discharge water from refineries, offshore platforms, and petrochemical facilities.

• Power Plants
  Early detection of oil contamination from turbines, transformers, and lubrication systems.

• Surface Water and Environmental Monitoring
  Continuous monitoring of rivers, lakes, reservoirs, and environmental monitoring stations for oil pollution events.

• Industrial Process Monitoring
  Ensuring product quality and process safety in industries such as petrochemical, chemical, steel, and manufacturing.

• Leak Detection and Early Warning Systems
  Providing real-time alarms for oil leaks to minimize environmental impact and operational risk.

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FAQs About DS530 Oil in Water Sensors

1. What is an Oil in Water Sensor?
An oil in water sensor is a device that detects and measures the concentration of oil or hydrocarbons present in water. It is used in industries such as environmental monitoring, wastewater treatment, and offshore oil and gas operations.

2. How does an oil in water sensor work?
OPS oil in water sensors use UV fluorescence to differentiate oil types.

3. What industries use oil in water monitors?
Oil & Gas: Monitoring leaks and spills in offshore drilling.
Marine & Shipping: Detecting oil discharge in ballast water.
Industrial Wastewater Treatment: Ensuring compliance with environmental regulations.
Power Plants: Monitoring cooling water contamination.

4. What is the detection range of an oil in water sensor?
Detection ranges vary by model.
OPS DS530 measures oil concentrations from 0-200 ppm and a Small measuring range of 0-5ppm can be customized.

5. How do I calibrate an oil in water sensor?
Most sensors require periodic calibration using a known oil standard. Some models feature automatic calibration and self-diagnostics for easier maintenance.

6. What factors affect sensor accuracy?
Temperature & Salinity: Can influence sensor response.
Particle Interference: High turbidity or suspended solids may impact readings.
Oil Type: Different oils have varying fluorescence/absorption properties.
Biofouling: Marine environments may require frequent cleaning.

7. How do I maintain an oil in water sensor?
Clean the sensor regularly to remove fouling.
Calibrate according to the manufacturer’s guidelines.
Protect the sensor from extreme environmental conditions.
Inspect cables and connections for damage.

8. Can an online oil in water analyzer differentiate between oil types?
Some advanced fluorescence-based sensors can distinguish between crude oil, diesel, lubricating oil, and other hydrocarbons based on their unique fluorescence signatures.

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