Turbidity Meter – TurbSense®

Online Turbidity Meters from Pi are called TurbSense® and include analysers, controllers and monitors which determine true online turbidity and/or suspended solids in water, using a nephelometric measurement of scattered light in accordance with ISO 7027. The TurbSense® sensor uses LED optical technology to provide an extremely stable, accurate, low maintenance sensor.

Turbidity Sensor
Online Turbidity Meter - TurbSense®
The TurbSense® online turbidity meter is a breakthrough in measurement technologies in that it automatically varies the light output so that the turbidity can be measured independently of background light and electronic drift.

Ranging from 0.01 NTU to 1000 NTU with a resolution in the 0-10 NTU range of 0.001, the TurbSense® online turbidity meter provides:

  • Excellent resolution
  • Single point calibration
  • The simplicity of a probe
  • Great value for money
  • Long term reliability
  • Autoclean so very low maintenance

Turbidity Analyser 3D View

Each probe is equipped with a light source, a side detector for the measurement of scattered light from the sample and a reference detector for monitoring the light output. The light source is a long-life IR LED emitter. This configuration allows accurate and reliable measurements of online turbidity and suspended solids to be made. Reliable calibration can be carried out using a single calibration with no need for a ‘zero’.

The probes are constructed of stainless steel and sapphire so can withstand demanding operating environments. An Autoclean system can be included to keep the optical surfaces clean, thereby reducing maintenance to a potential ‘maintenance free’.

The TurbSense® online turbidity meter is suitable for dip monitoring and mounting in a debubbling flow cell.

The operating principle of the online turbidity meter is subject to a patent application and is unique in the way it handles the data it receives in order to calculate a zero, to calibrate and to derive the NTU (FNU) value from the readings.
  • AutoClean solid state optical sensor – no moving parts
  • Single point calibration – very easy to use
  • Stable and reliable – excellent process control
  • Suitable for all potable, waste and process waters between 0 NTU and 1000 NTU
  • ‘Maintenance free’ – low cost of ownership
  • No ‘zero’ required – improved accuracy at the low end
  • Up to 1 year between calibration – very little drift
  • Up to 10 bar – for inline operation
  • 0.001 resolution
  • Automatic debubbling and bubble removal solutions – no interference from bubbles


The TurbSense® online turbidity meters are available with different controllers giving you the same great performance with different communication, display, and control options. With the TurbSense® range of online turbidity meters, you get everything that you need – and nothing that you don’t, without sacrificing the quality of the measurement.

The online turbidity meters from Pi are now in use around the world providing trouble free, easy to use solutions to a range of online turbidity monitoring and control.

Louis Wilmot

North West, South, South West of England and Wales
"Get in touch, I'd be happy to help."
Louis Wilmot

North West, South, South West of England and Wales
"Get in touch, I'd be happy to help."
Louis Wilmot

North West, South, South West of England and Wales
"Get in touch, I'd be happy to help."
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