WTW VisoTurb® 700 IQ

The VisoTurb® 700 IQ on-line turbidity sensor is a high quality optical sensor for turbidity measurement.

Category: Tag:


On-line Turbidity Measurement using revolutionary technology:
Continuous turbidity and suspended solids measurement are of great importance in analytic measurement in modern wastewater treatment plants. Optical infrared scattered light sensors are established for online measurement of this measuring parameter in treatment plants.


  • Municipal Water and wastewater Treatment
  • Industrial wastewater treatment
  • Non-mechanical ultrasound cleaning
  • Guaranteed low Maintenance
  • Long-term sensor reliability
  • Factory Calibrated
  • Long-term stability (SensorCheck function)
  • Compliance with EN ISO 7027

Turbidity Measurement according to the Nephelometric Principle:
Using this principle, scattered light is measured at an angle of 90 degree. This method is ideal for low and medium range turbidity up to 4000 FNU. In compliance with EN 27027 and ISO 7027, infra red light with a wavelength of 860 nm is used. This wavelength is outside of the visible range – thus potential coloration of the sample does not effect the measurements.

FNU; NTU; TEF 0.05 … 4000 FNU
mg/l SiO2; ppm SiO2 0.1 … 4000 mg/l SiO2
g/l TSS 0.0001 … 400 g/l TSS


Turbidity measurements in aqueous media with VisoTurb® 700 IQ sensors are carried out nephelometrically in compliance with EN ISO 7027.