Smart Turbidity Sensor - Self-Clean 135°IR.jpg_1
ULTRA Series Digital Smart Turbidity Sensor - Single Beam - Auto Clean ULTRA Series Digital Smart Suspended Solids Sensor - Dual IR Beam - Auto Clean Turbidity Transmitter - Smart Digital, Auto-Clean 135°IR
ULTRA Series Digital Smart Turbidity Sensor - Single Beam - Auto Clean

ULTRA Series Digital Smart Turbidity Sensor - Single Beam - Auto Clean


The ULTRA Series Digital Smart Turbidity Sensor - Single Beam with auto-clean is state-of-the-art when it comes to combining smart sensor technology with industry-leading optical measurement.




  • Smart Sensor Technology directly integrates with your industrial network or with Turtle Tough Smart Analysers
  • High-quality materials and superior construction for industrial applications.
  • Highly stable near-monochromatic infrared light source avoids the interference of chroma in liquid and external visible light influence
  • Built-in luminosity compensation provides improved measurement accuracy
  • A high-quality quartz lens greatly improves the optical transmittance allowing for superior transmission and absorption of infrared wavelengths
  • Wide range, high stability, high precision and excellent reproducibility
  • Communication: MODBUS RTU (RS-485)

Few sensors can boast the versatility, low maintenance and industrial-strength that the TT-NTU-DSS-7832D-SC turbidity sensor has to offer. The sensor body is made of 316L stainless steel, which is corrosion-resistant and extremely durable. A titanium version is also available for seawater applications or environments with high levels of corrosion.

The IP68 waterproof design can be fully immersed for continuous turbidity measurement in a wide variety of industrial applications including water quality monitoring, municipal water, industrial process water, cooling water, activated carbon filter effluent and membrane filtration effluent just to name a few.

The TT-NTU-DSS-7832D-SC comes complete with a fully automatic sensor wiper. This self-cleaning function effectively prevents solid particles from building up on the lens, not only reducing the maintenance requirement but greatly improving measurement accuracy over the long term. The self-cleaning function can be set according to the application requirements to provide stable data and reliable performance, while the built-in diagnostic functions greatly simplify the sensor management.

The principle of the Turtle Tough Smart Digital Turbidity sensor is based on the combined infrared absorption and scattered light method. The ISO7027 method can be used to continuously and accurately determine the turbidity value. According to ISO7027 infrared double-scattering light technology is not affected by chromaticity to determine the sludge concentration value.

Sensor Specifications

Product name ULTRA Series Digital Smart Turbidity Sensor - Single Beam - Auto Clean
Code TT-NTU-DSS-7832D-SC
Output communication RS485 MODBUS RTU
Measurement mode 135°IR scattered light method
Dimensions  Diameter: 50mm* Length: 223mm
Housing material  PVC+316 Stainless steel
Waterproof rating  IP68
Measurement range 10-3000 NTU
Measurement accuracy  ±5% or 0.5 NTU, whichever is greater
Pressure Rating  ≤ 44 PSIG
Measuring temperature  0-45℃
Calibration Standard liquid calibration, water sample calibration
Cable length Standard 10m. Optional lengths available on request
Thread 1” MNPT
Weight 2.0 Kg
Application General industrial applications, rivers, lakes, environmental monitoring, water quality, etc.

 Digital Smart 6500 Turbidity Analyser 


The Turtle Tough Digital Smart 6500 Turbidity analyser integrates directly with our Digital Smart Turbidity sensor with single beam and auto-clean.  As a sensor-analyser system, they provide reliable performance and accurate data when measuring, controlling and monitoring turbidity and sludge concentration.

TurtleTough Turbidity Transmitter Smart Digital 1


The Digital Smart 6500 Turbidity Analyser is an efficient monitoring control instrument widely used in drinking water treatment plants,  drinking water distribution networks, pools, water treatment projects, sewage treatment, water disinfection and other industrial  wastewater processes. Whether evaluating activated sludge and the entire biological treatment process, analysing wastewater discharged after purification treatment, or detecting sludge concentration at different stages, the sludge concentration meter can give continuous and accurate measurement results.

For technical specifications please download the product brochure.  

About our SMART Sensor Technology
Turtle Tough gives you the option of a propriety digital signal or an open-source Modbus RTU signal that is universally accepted. To find more about the benefits of our Smart technology go to

Sensor Care and Maintenance
Turtle Tough sensors can be cleaned and calibrated offline to facilitate a hot-swapping maintenance regime. To know more about our sensor care and hot-swap maintenance regime go to


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