The NTU sensor is an industrial optical probe for real-time online turbidity measurement of water. It adopts the standard 90° infrared scattered light principle, which effectively avoids interference from colored water samples and ensures stable test data.

Multiple measuring ranges are optional: 0~1NTU, 0~20NTU, 0~100NTU, 0~2000NTU, covering pure water, tap water, surface water and sewage. Built-in automatic temperature compensation to offset temperature drift. Integrated digital circuit outputs RS485 Modbus-RTU signal, compatible with PLC, turbidity controller and cloud monitoring system.

IP68 submersible waterproof, equipped with standard 3/4" NPT thread for pipeline, tank and pool installation. Optional automatic cleaning wiper prevents dirt and algae adhesion, greatly lowering maintenance workload for long-term continuous monitoring.

NTU Sensor is an industrial infrared scattering turbidity sensor for continuous online turbidity measurement of water bodies. Based on internationally recognized 90° infrared light scattering principle, it effectively eliminates water color interference and delivers stable, repeatable measuring data.

The optical window adopts high-hardness sapphire glass, scratch-resistant and anti-corrosion, greatly extending service life. Built-in Pt1000 temperature compensation automatically corrects temperature-induced measurement deviation. Equipped with standard RS485 MODBUS-RTU digital signal output, it can be connected to turbidity controllers, PLC, data loggers and remote cloud monitoring systems conveniently.

Fully sealed IP68 corrosion resistant housing supports submerged installation and flow cell installation. Optional automatic cleaning brush can reduce lens dirt accumulation and lower maintenance workload.

It is widely applied in waterworks, river and lake surface water monitoring, municipal sewage plants, swimming pools, reclaimed water, aquaculture and industrial circulating water systems.

Key Advantages

Infrared optical design, anti-color interference, wide application range
Four selectable ranges to match different water quality scenarios
Digital RS485 output, strong anti-interference, easy automation integration
Optional self-cleaning structure, reduce manual cleaning frequency
Hard anti-fouling optical window, long service life
Simple structure, easy on-site calibration and disassembly

Application

Pure water station, drinking water plant, secondary water supply, river & lake environmental monitoring, aquaculture, circulating cooling water, municipal sewage treatment, mining wastewater.

Technical Specifications

Specification item	parameter description
Temperature range	0–60°c
Pressure	0–2 bar
Measurement principle	90-degree scattering (optics)
Resolution	0.01%
Measurement range	0 - 400ntu
Accuracy	±5.0%fs
Power supply	dc 9-30v (recommended 12v)
Output signal	rs485,4-20ma
Line length	standard 5 meters (customizable)
Electrical connection	pin-type
Housing material	pom
Installation method	circulating type
Protection level	ip68