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Digital RS485 Oil Water Quality Sensor for Surface Water
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Digital RS485 Oil Water Quality Sensor for Surface Water

The oil in water sensor monitors the oil content in water by ultraviolet fluorescence method. It quantitatively analyzes the concentration of oil in water based on the fluorescence intensity emitted by petroleum and its aromatic hydrocarbon compounds and compounds containing conjugated double bonds after absorbing ultraviolet light. Aromatic hydrocarbons in petroleum can produce fluorescence under ultraviolet light excitation, and the value of oil in water can be calculated based on the intensity of the fluorescence.
The product is widely used in real-time online monitoring of oil in wastewater discharge in industrial fields such as petroleum, chemical engineering, and power, as well as in real-time online monitoring of oil in environmental water bodies such as surface water, seawater, drinking water, and pollution source discharge control.
Model DOIL-800
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Detail

Working Principle

This Online Oil-in-Water Analyzer employs advanced ultraviolet fluorescence technology for real-time oil content monitoring in water. Petroleum-derived aromatic hydrocarbons, as well as conjugated double-bond compounds, emit characteristic fluorescence upon absorbing ultraviolet light. The analyzer quantitatively determines the oil concentration in water by precisely measuring the intensity of this emitted fluorescence, ensuring accurate and reliable detection without relying on chemical reactions.

Key Features

  • Advanced Optical Technology: Adopts ultraviolet fluorescence monitoring, eliminating the need for reagents or sample dilution. Enables long-term stable operation with minimal operational complexity.

  • Rapid & Continuous Measurement: Features a short response time, supporting real-time continuous monitoring to capture dynamic changes in oil content promptly.

  • Compact & Energy-Efficient Design: Equipped with an LED light source, offering small footprint, low power consumption, and easy on-site integration with existing industrial systems.

  • Automated Maintenance: Integrated sensor self-cleaning function significantly reduces manual maintenance workload and extends service life.

  • Anti-Interference Performance: Incorporates proprietary optical and electronic filtering technology to effectively eliminate ambient light interference, ensuring measurement accuracy in complex environments.

Applications

  • Real-time online monitoring of oil content in environmental water bodies, including surface water, groundwater, and drinking water.

  • Pollution source emission control: Ideal for monitoring oil discharges from industrial facilities, wastewater treatment plants, and petrochemical operations to ensure compliance with environmental regulations.


Specifications

Specifications

Details

Measurement Range

0.01~100mg/L

Measurement Accuracy

Less than ±5% or 0.15mg/L of measured value, maximax criterion

Repeatability

±2%

Resolution

0.01mg/L

Pressure Range

≤0.4Mpa

Materials

Main Body: SUS316L (Ordinary version), Titanium alloy (Seawater version); Cable: PUR

Power Supply

9~36VDC

Communication Protocol

MODBUS RS485

Storage Temperature

-15-50℃

Operating Temperature

0~45(not freeze)

Weight

2.1KG

Level of Protection

IP68/NEMA6P

Cleaning Method

Automatic scraping and brushing cleaning

Cable Length

Standard: 10 m, the maximum can be extended 100m



FAQ – Frequently Asked Questions


1. Where are your products manufactured?

Our products are proudly designed and manufactured in China, following international quality standards and certified processes.


2. Can you provide OEM/ODM services for international clients?

Yes, we offer customized solutions and private labeling to meet your brand’s needs worldwide.


3. Are your products compliant with international safety and quality standards?

Absolutely. Our products are tested to meet CE, RoHS, and other international certifications.


4. How do you handle shipping and delivery for overseas orders?

We cooperate with major international couriers to ensure fast and reliable delivery to your location.


5. Can I get product samples before placing a large order?

Yes, we provide samples so you can evaluate product quality before committing to bulk orders.


6. What is the typical lead time for production and delivery?

For standard products, we usually ship within 5–7 days after order confirmation. Customized products may take slightly longer.


7. How do you support clients after the purchase?

We offer 24/7 technical support, product guidance, and warranty service to ensure smooth operation.


8. Do you provide support for international clients after purchase?

Yes, we offer remote technical assistance, manuals in English, and prompt solutions to any issues, ensuring smooth use worldwide.


9. How can I place an order if I am located overseas?

You can contact our sales team directly via email or website inquiry. We provide professional guidance throughout the ordering process.


10. Why should I choose your company over other suppliers in China?

We combine over 30 years of manufacturing experience, advanced technology, strict quality control,

and global customer service to deliver reliable, high-quality solutions.


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