Yexsensor YEX-OIL-406-S Online Oil in Water Sensor

Yexsensor YEX-OIL-406-S online oil in water sensor is a professional online monitoring device provided for system integrators, IoT solution providers and water treatment engineering companies. The sensor is based on the fluorescence method and can quickly and stably detect the content of soluble oil and emulsified oil in water, meeting the continuous monitoring needs of petrochemical, industrial wastewater treatment, oilfield exploitation and environmental supervision fields.

With increasingly strict environmental protection regulations on oil pollutant emission control, traditional laboratory analysis or monitoring methods that require frequent maintenance have been difficult to adapt to the requirements of real-time process control. YEX-OIL-406-S combines UV LED light source with precision fluorescence detection technology to provide engineering projects with high-sensitivity and low-drift real-time data support, helping process optimization, leakage warning and compliance emission management, and effectively reducing overall operation and maintenance costs.

Yexsensor YEX-OIL-406-S Online Oil in Water Sensor Working Principle

YEX-OIL-406-S works by utilizing the characteristics of soluble oil having absorption peaks and emission peaks at specific wavelengths. The sensor emits monochromatic light at the absorption peak wavelength of soluble oil. When the light irradiates oil substances in water, the oil molecules absorb energy and release fluorescence emission peaks of another wavelength. The intensity of the emitted light is proportional to the oil content in water, thereby achieving quantitative measurement.

The sensor adopts a UV LED light source with high stability and long service life, and effectively filters natural light and ambient light interference through AC drive mode. Combined with automatic temperature compensation (Pt1000), it ensures the accuracy and repeatability of measurement results under different working conditions. The entire process does not require chemical reagents, has a rapid response, and is suitable for long-term online deployment.

Yexsensor YEX-OIL-406-S Online Oil in Water Sensor Product Features

YEX-OIL-406-S embodies multiple practical advantages in engineering applications:

• UV LED light source provides high stability and long service life with small drift

• AC drive design effectively suppresses natural light and ambient light interference

• Supports RS-485 Modbus/RTU protocol for easy system integration; optional 4-20 mA analog output

• Fast response time (T90 < 30 s), minimum detection limit as low as 0.4 mg/L

• Two-point calibration method, easy operation and low maintenance requirements

• 316L stainless steel shell, IP68 protection level, strong corrosion resistance, suitable for various industrial water bodies

• Low power consumption design (0.2 W @ 12 V), adaptable to on-site power supply conditions

• Submersible installation, compact structure and convenient installation

These features make YEX-OIL-406-S a preferred solution with high reliability and convenient integration in oil pollution monitoring projects.

Yexsensor YEX-OIL-406-S Online Oil in Water Sensor Technical Parameters

Measurement Parameters and Specifications

Yexsensor YEX-OIL-406-S Online Oil in Water Sensor Installation and Electrical Connection

Installation Guide

YEX-OIL-406-S adopts submersible installation. To ensure measurement accuracy, during installation, keep the sensor at least 2 cm away from the side wall and at least 10 cm away from the bottom to avoid boundary effects or bottom sediment interference. Vertical installation is recommended. The front end of the sensor should be immersed in the water body at an appropriate depth. The installation position should be convenient for later maintenance and cleaning.

Electrical Connection

The sensor is equipped with a 5-core shielded cable, and the wire sequence is defined as follows:

• Red wire: Power positive pole (12～24 V DC)

• Black wire: Ground wire (GND)

• Blue wire: RS-485 A

• White wire: RS-485 B

• Yellow wire: Current output (optional; if not used, it can be left floating)

Before wiring, please carefully check the sequence to prevent wiring errors. All wiring points must undergo strict waterproof treatment. The cable should have anti-corrosion ability to adapt to long-term immersion in water bodies (including seawater) or exposure to humid environments.

Maintenance and Care

YEX-OIL-406-S is designed as a low-maintenance product, with the focus on keeping the measurement window clean.

Maintenance Schedule Recommendations

• Calibration: Perform two-point calibration according to the requirements of the competent department or actual working conditions

• Daily Inspection: Regularly visually check the cleanliness of the measurement window

The actual maintenance frequency can be flexibly adjusted according to the degree of water quality pollution on site.

Yexsensor YEX-OIL-406-S Online Oil in Water Sensor Maintenance Methods

1. Outer surface cleaning: Rinse with tap water. If there are residual debris, wipe with a damp soft cloth; stubborn dirt can be cleaned with a small amount of neutral household detergent.

2. Cable inspection: Ensure that the cable is not overly tightened or pulled to prevent internal wire breakage.

3. Measurement window inspection: Regularly confirm that there is no dirt attached to the window and clean it in time to maintain accurate readings.

There are no user-serviceable parts inside the sensor. Avoid disassembly.

Precautions

• Avoid subjecting the sensor to violent mechanical impact

• Optical components are sensitive; handle with care

• During calibration, ensure the sensor is placed vertically, with the front end at least 10 cm away from the bottom of the container. Perform operations only after the value is stable.

Calibration Method

• Zero point calibration: Use a large bucket containing an appropriate amount of distilled water, immerse the sensor vertically, wait for the value to stabilize for 3～5 minutes, then execute the zero point calibration command.

• Slope calibration: Place the sensor in the standard solution, wait until stable, then execute the slope calibration command.

Yexsensor YEX-OIL-406-S Online Oil in Water Sensor Application Scenarios

Yexsensor YEX-OIL-406-S is widely used in industrial and environmental engineering projects that require real-time monitoring of oil pollution.

• Petrochemical and Refinery Plants
         Deployed in production wastewater treatment systems, oil-water separator outlets and discharge outlets to monitor oil content in real time, prevent excessive emissions, and support process parameter adjustment and rapid leakage response.

• Industrial Wastewater Treatment Systems
         Suitable for industries such as mechanical processing, metal surface treatment, and food processing that produce oily wastewater. The sensor can be connected to PLC or SCADA systems to achieve continuous process control, reduce laboratory analysis frequency, and optimize treatment efficiency.

• Oilfield Exploitation and Offshore Platforms
         Used for produced water and oily sewage monitoring to assist in oil-water separation effect evaluation and environmental compliance management. IP68 protection and corrosion-resistant materials make it suitable for harsh working conditions.

• Environmental Monitoring and Surface Water Supervision
         As the core equipment of rivers, lakes or port water monitoring stations, it provides continuous oil pollution data to support pollution source tracing and water quality early warning.

• Port and Ship Sewage Treatment
         Monitor oil content in ballast water and bilge water to comply with relevant emission standards of the International Maritime Organization.

In these scenarios, YEX-OIL-406-S effectively simplifies system integration and reduces long-term project operating costs with its fast response, low maintenance characteristics and standard communication protocols.

Frequently Asked Questions (FAQ)

Q1. What measurement principle does YEX-OIL-406-S adopt?

The sensor adopts the fluorescence method and measures using the absorption peak and emission peak characteristics of oil substances, with high sensitivity and good repeatability.

Q2. What is the range and resolution of the sensor?

The range is 0～40.00 mg/L, resolution 0.01 mg/L, and minimum detection limit 0.4 mg/L, suitable for trace oil pollution monitoring.

Q3. What output methods are supported?

The standard configuration is RS-485 Modbus/RTU protocol, with optional 4-20 mA current output, which is convenient for integration with different control systems.

Q4. What distance requirements should be noted during installation?

Keep more than 2 cm from the side wall and more than 10 cm from the bottom to avoid interference and ensure measurement accuracy.

Q5. How to calibrate the sensor?

Adopt the two-point calibration method: use distilled water for zero point and standard solution for slope. After the value is stable, complete it through commands. The operation is simple.

Q6. How is the daily maintenance workload?

The maintenance requirement is low, mainly regular cleaning of the measurement window. The sensor is designed without a cleaning brush, with a simple and reliable structure.

Q7. Does it support automatic temperature compensation?

Yes, it has a built-in Pt1000 automatic temperature compensation function, which can effectively reduce the impact of temperature changes on measurement results.

Q8. What about product warranty and after-sales service?

The product has undergone strict inspection and 72-hour aging test before leaving the factory. One-year warranty service is provided from the date of sale (excluding improper use). The manufacturer provides technical support and spare parts service for system integrators.

Summary

Yexsensor YEX-OIL-406-S online oil in water sensor takes the fluorescence method as the core technology, taking into account high precision, fast response, low maintenance requirements and industrial-grade reliability, providing a stable and economical online solution for oil pollution monitoring engineering projects. Its UV LED light source, Modbus/RTU compatibility and 316L stainless steel design make it widely applicable in petrochemical, industrial wastewater treatment and environmental monitoring fields.

Through real-time and accurate oil content data, the sensor helps users optimize process flow, ensure compliant emissions, and effectively control operation and maintenance costs. It has become a reliable choice for many engineering companies in oily water monitoring projects.

For detailed product quotations, technical specification sheets, selection guidance, customized output configuration or project application cases, please contact the Yexsensor professional team. We will provide targeted technical support and configuration solutions according to your specific working conditions and system requirements to help your project be implemented efficiently and operate stably for a long time.