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VisoTurb 700 IQ turbidity sensor

VisoTurb 700 IQ turbidity sensor

Turbidity sensor with ultrasonic cleaning, connectable to the IQ SENSOR NETVisoTurb®: Optical turbidity sensors according to nephelometric principle according to EN ISO 7027 for the in-situ use in water/wastewater with ultrasonic cleaning system:Ultrasonic cleaning without mechanicsExtremely low-maintenanceHighly accurate factory calibrationHigh operational safety (sensor check function)The ultrasonic cleaning system ensures the low-maintenance and continuously reliable measuring operation of the sensors, which are therefore very suited for extreme applications, such as wastewater treatment plants.With the nephelometric measuring principle of the VisoTurb®, the stray light is measured at a 90° angle. The measuring setup is suitable for low and medium turbidity values up to 4000 FNU. According to EN ISO 7027, infrared light is used in the wavelength range of 860 nm. This wave length is outside the visible range, so that possible sample colorings generally do not cause any interference.The sea water model includes the sensor for use in special media: All wetted parts are made of titanium and plastic and are therefore extremely resistant to corrosion.

  • Specs


    VisoTurb® 700 IQ

    VisoTurb® 700 IQ SW*

    Order No.



    * SW: Sensor as sea water model (with plastic arming (POM))

    Measuring method

    Nephelometric principle in compliance with EN ISO 7027

    Measuring range


    0.05 ... 4000 FNU

    mg/l SiO2; ppm SiO2

    0.1 ... 4000 mg/l SiO2

    g/l TS

    0.0001 ... 400 g/l TS



    Automatic according to measuring range 0.001 ... 1 FNU

    mg/l SiO2; ppm SiO2

    0.001 mg/l ... 0.01 g/l

    g/l TS

    0.001 mg/l … 1 g/l


    Process variation coefficient according to DIN 38402 part 51 <1 % (in the range up to 2000 FNU)
    Repeatability according to DIN ISO 5725 or DIN 1319 < 0.015 % or ≥ 0.006 FNU



    Factory calibration with formazine

    mg/l SiO2; ppm SiO2

    Factory calibration with SiO2

    g/l TS

    Calibration by user, (TSS regulations in compliance with DIN 38414)

    Cleaning System

    Ultrasound cleaning system


    Contamination detection of optical window; failure of cleaning system

    Pressure Resistance

    10 bar (incl. sensor connection cable)

    Maximum 2 bar

    Ambient Conditions

    Operating temperature: 32 ... 140 °F (0 ... 60 °C);
    ultrasonic cleaning system: 32 ... 104 °F (0 ... 40 °C) (overheating protection);
    Storage temperature: 23 ... 149 °F (-5 ... +65 °C)

    Electrical connections

    2-wire shield cable with quick fastener to sensor

    Electromagnetic Compatibility

    EN 61326, Class B, FCC Class A;
    Intended for indispensable operation





    Measuring window: Sapphire;
    Sensor body: V4A stainless steel 1.4571;
    Protection rating: IP 68

    Measuring window: Sapphire;
    Sensor body: Titanium, POM;
    Protection rating: IP 68

    Weight (without cable)

    Approx. 2.18 lb (900 g)

    3.13 lb (1420 g)

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