NBL-OIL-408-S Oil-in-Water Sensor: Industrial-grade Oil Pollution Online Monitoring, Seawater Corrosion Resistant

NBL-OIL-408-S Online Oil-in-Water Sensor: Stable and Reliable Industrial-grade Oil Pollution Online Monitoring Solution

In the fields of industrial water treatment, petrochemical industry and environmental monitoring, trace oil pollution in water often leads to equipment corrosion, excessive discharge and ecological risks. The NiuBoL NBL-OIL-408-S online oil-in-water sensor adopts advanced fluorescence method principle. It excites the characteristic fluorescence signal of soluble oil in water through UV LED light source to achieve real-time and high-precision monitoring. The sensor is easy to install and maintain, and is particularly suitable for system integrators and engineering contractors to build reliable online water quality monitoring systems, effectively solving the pain points of slow response, poor anti-interference and complex integration in traditional detection methods.

Core Advantages

• High Stability and Long Service Life: UV LED light source combined with AC drive effectively filters natural light interference, with small drift and long service life.

• High Precision and Fast Response: Range 0～40.00 mg/L, resolution 0.01 mg/L, response time T90＜30s, minimum detection limit 0.4 mg/L.

• Easy Integration and Reliable Communication: Natively supports RS-485 Modbus/RTU protocol, optional 4-20 mA output, IP68 protection rating, 316L stainless steel housing, suitable for harsh industrial environments.

NBL-OIL-408-S Online Oil-in-Water Sensor by Fluorescence Method Product Overview

The NiuBoL NBL-OIL-408-S online oil-in-water sensor is an industrial-grade digital sensor developed for continuous online monitoring of soluble oil content in water bodies. Based on the fluorescence method principle, soluble oil absorbs energy at specific spectral absorption peaks and releases characteristic emission peak fluorescence, and its light intensity is directly proportional to oil content. The sensor requires no complex reagents, is easy to install, and has stable data output. It is widely suitable for scenarios that require real-time control of oil pollution in water.

For system integrators, the NBL-OIL-408-S provides a standardized Modbus protocol interface that can be directly connected to existing PLC, DCS or IoT platforms to achieve seamless data collection and remote monitoring. For engineering contractors, it reduces on-site wiring difficulty and later maintenance costs, ensuring long-term stable operation of the entire monitoring system. The product has undergone 72-hour aging testing and strict quality inspection, and has high reliability upon leaving the factory.

NBL-OIL-408-S Online Oil-in-Water Sensor by Fluorescence Method Key Technical Advantages

1. Advanced Fluorescence Measurement Technology
   The sensor uses UV LED as the excitation light source, with high stability, small drift and long service life. Through AC drive method, it effectively suppresses external interference such as natural light and ambient light, ensuring that measurement data remains accurate under complex water quality conditions. The fluorescence signal intensity is directly positively correlated with the soluble oil content in water, achieving high-sensitivity detection.

2. Rugged and Durable Hardware Design
   - Housing material is 316L stainless steel, with excellent corrosion resistance, suitable for corrosive media such as seawater and industrial wastewater.
   - Protection rating IP68, fully submerged design, can work stably in water for a long time.
   - Built-in cleaning brush, effectively reducing dirt attachment on the measurement window and lowering maintenance frequency.
   - Built-in Pt1000 automatic temperature compensation, accuracy includes ±0.3℃, adapting to working temperature range of 0～50℃.

3. Intelligent Communication and Integration Friendly
   Supports RS-485 Modbus/RTU protocol, with stable and reliable communication, easy to integrate with various host computer systems. Optional 4-20 mA analog output meets the needs of different control systems. Power consumption is only 0.2W@12V, and the low-energy design is suitable for distributed deployment. The sensor connector adopts M16-5 core waterproof male head, and the cable is 5-core shielded wire with strong anti-interference capability.

4. Convenient Maintenance and Calibration
   Two-point calibration method (zero point + slope), simple operation. The cleanliness of the measurement window directly affects reading accuracy. The built-in cleaning brush combined with regular soft cloth wiping can maintain long-term performance. There are no user-maintainable parts inside the sensor, reducing the risk of failure.

These advantages enable the NBL-OIL-408-S to perform excellently in long-term operation, making it particularly suitable for engineering projects that require high reliability.

NBL-OIL-408-S Online Oil-in-Water Sensor by Fluorescence Method Technical Specifications

Note: The sensor connector is M16-5-core waterproof male connector, with standard 5-meter cable.

NBL-OIL-408-S Online Oil-in-Water Sensor by Fluorescence Method Application Scenarios

1. Petrochemical and Refinery Wastewater Discharge Monitoring: Real-time monitoring of oil content in production wastewater to ensure discharge meets environmental protection standards and prevent oil pollution diffusion.

2. Industrial Circulating Cooling Water System: Detecting oil pollution caused by heat exchanger leakage to protect equipment from corrosion and extend system service life.

3. Ship and Port Ballast Water / Bilge Water Treatment: Monitoring oil content in ballast water or bilge water to help ships meet international discharge regulations.

4. Municipal Wastewater Treatment and Environmental Water Body Monitoring: Applied to effluent monitoring in wastewater treatment plants and oil pollution early warning in natural water bodies such as rivers and lakes.

5. Power Plant Boiler Condensate Monitoring: Timely detection of turbine oil leaking into condensate to ensure safe operation of power generation equipment.

6. Oilfield Produced Water and Oily Wastewater Treatment: Online control of oil content in produced water to support reinjection or treatment process optimization.

In these scenarios, the sensor’s high stability and Modbus protocol integration capability help users build efficient and intelligent water quality monitoring networks.

Installation and Wiring Guide

Installation Requirements

Adopt submerged installation with 3/4NPT interface. During installation, ensure the sensor is at least 2cm away from the side wall and at least 10cm away from the bottom to avoid wall or bottom reflection interference with measurement. Place vertically in the water body with the front end kept clean.

Electrical Connection

Use 5-core shielded cable with the following wiring sequence:

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

• Black wire: Ground (GND)

• Blue wire: RS-485 A

• White wire: RS-485 B

• Yellow wire: 4-20 mA current output (optional, leave floating if not in use)

Before powering on, please carefully check the wiring sequence. All wiring points must undergo waterproof treatment. When the cable is immersed or exposed for a long time, use corrosion-resistant cable and avoid excessive tension to prevent internal breakage.

FAQ

Q1: Is the NBL-OIL-408-S suitable for seawater environments?

A: Yes. The sensor housing is made of 316L stainless steel with IP68 protection rating, resistant to seawater corrosion, and suitable for monitoring in saline water bodies such as oceans and ports.

Q2: How to calibrate the sensor?

A: Use two-point calibration: zero point calibration with distilled water and slope calibration with standard solution. After the value stabilizes for 3～5 minutes, complete calibration through Modbus commands or supporting controller.

Q3: Can the sensor be integrated with PLC systems?

A: Fully supported. Built-in RS-485 Modbus/RTU protocol allows direct connection to most PLC and SCADA systems for data acquisition and remote control.

Q4: What to do if the measurement window gets dirty and affects readings?

A: The sensor has a built-in cleaning brush that can be started periodically for cleaning. It is also recommended to check the window weekly and wipe with a soft cloth or tap water with detergent to maintain cleanliness.

Q5: Will natural light or ambient light interfere with measurement?

A: No. The AC drive design effectively filters natural light interference, ensuring stable data in indoor/outdoor and day/night environments.

Q6: Does the response time meet real-time monitoring requirements?

A: Yes. T90 response time is less than 30 seconds, allowing quick capture of changes in oil content in water, suitable for dynamic process control.

Q7: What is the warranty period?

A: One-year warranty service is provided from the date of sale (excluding improper use). Please contact technical support in time if there are cable failures or connection issues.

Q8: What is the lowest oil content the sensor can detect?

A: The minimum detection limit is 0.4 mg/L, with a resolution of 0.01 mg/L within the 0～40 mg/L range, meeting the needs of most industrial discharge and process monitoring.

Summary and Cooperation Invitation

The NiuBoL NBL-OIL-408-S online oil-in-water sensor provides a professional and reliable engineering solution for water quality monitoring with fluorescence method as the core, combined with high-stability UV LED light source, robust 316L material and standardized Modbus communication. It not only improves monitoring accuracy and system integration efficiency but also helps engineering projects reduce long-term operation and maintenance costs.

If you are planning an online water quality monitoring system, wastewater treatment project or environmental supervision platform, please feel free to contact the NiuBoL technical team. We will provide detailed technical parameter support, selection suggestions, installation guidance and long-term stable supply to jointly build an efficient and intelligent industrial IoT monitoring solution. Contact us immediately to obtain detailed technical materials or prototype testing opportunities, and let reliable monitoring start with NBL-OIL-408-S.

NBL-OIL-408-S Online Oil-in-Water Sensor Data Sheet

NBL-OIL-408-S Online Oil-in-Water Sensor.pdf