call now 01785 254 597


Inline Turbidity Sensor

inline turbidity sensor tu810 910

The TU810 is a Turbidity Sensor with integrated electronics, designed to be mounted directly into a pipe or into a sample line (pictured above), to give continuous or online turbidity measurements.

The TU810 uses an infrared light emitting source and a 90° photoreceptor to measure back scattering in accordance with ISO 7027 – EN 27027. The TU810 is designed to IP68 and is manufactured in PVC.

Inline Turbidity Sensor Introduction

The TU810 is designed to work in combination with our Turbidity Controller TU7685 - which amplifies the signal to give a visual indication of the measured turbidity value, in addition to displaying the measured turbidity value, the TU7685 includes a wide array of control options, a 4-20mA output and alarm relays.

The TU810 is designed to be mounted into a flow sensor for measurements directly in pipes. Alternatively, the TU810 can be mounted into our TU910 sample line sensor holder, this takes an incoming line from the pipework into the flow cell, which then discharges to drain. The sample line holder has flow regulating valves and is designed specifically to prevent bubbles from blinding or adversely affecting the sensor.

Inline Turbidity Sensor - NTU Ranges

The TU810 is designed for water quality analysis and is suitable for drinking water applications; raw water applications and water treatment applications. The ranges available with the TU810 are as follows:-

Please note Nephelometric Turbidity Units shows as NTU

Turbidity RangeTurbidity Resolution
0 - 4.000 NTU 0.001 NTU
0 - 40.00 NTU 0.01 NTU
0 - 400.0 NTU 0.1 NTU
0 - 4000 NTU 1 NTU

The TU810 is easily configurable with the Turbidity Controller TU7685.  By accessing the configuration menu's in the TU7685, the TU810 turbidity sensor can be re-ranged as well as calibrated.  The TU810 is a sophisticated sensor, able to offer a reading as low as 0.001 NTU through to 4000 NTU, all from the same optical sensor.

Inline Turbidity Sensor Installation

The TU810 is designed to be mounted either inline directly into pipework using a locking nut, or installation into a sample line cell.  This is where a secondary line runs from the primary pipework, through the sample line flow cell, and then the sample discharges to a drain.

Turbidity measurements in very clean water, such as drinking water, are susceptible to false positives from bubbles in the measured solution. As bubbles are caused by water discharging to atmospheric pressure, the flow cell TU910 includes a tightening tap to allow the sample flow cell to remain pressurised and so prevent bubbles affecting the measurement.

When installed directly into pipework or the sample cell, the TU810 is designed to operate to pressures of up to 6 bar.  In addition, using the infrared spectrum, the TU810 is not affected by the colour of the measured solution and within pipework should not be affected by bright light blinding the photoreceptor.

Inline Turbidity Sensor Features & Benefits

The TU810 is a precision turbidity sensor which is accurate across a very wide range of turbidity measurements.  Fully scaleable from the companion TU7685 Turbidity Controller, the TU810 can measure from as low as 0.001 NTU, all the way up to 4000 NTU.

Designed to be permanently mounted into pipework or as part of a sample line using our TU910 flow cell, the TU810 can provide continuous turbidity readings, and provides measurements which can be controlled from the TU7685 controller.

The PVC body and IP68 rating allow the cell to be permanently mounted into pipework where the pressure does not exceed 6 Bar, and requires minimal maintenance.

The turbidity measurements follow the standard nephelometric back scattering methodology (ISO 7027 - EN27027) and the infra-red light is not affected by the colour of the sample.

TU810 Inline Turbidity Sensor Specifications

  • Specifications


    Inline Turbidity Transmitter

    Model No:- TU810

    Turbidity Range & Resolution:- 0 – 4.000 NTU with 0.001 NTU resolution

    Turbidity Range & Resolution:- 0 – 40.00 NTU with 0.01 NTU resolution

    Turbidity Range & Resolution:- 0 – 400.0 NTU with 0.1 NTU resolution

    Turbidity Range & Resolution:- 0 – 4000 NTU with 1 NTU resolution

    Light:- IR LED to 890nm wavelength*

    Materials and Rating:- Manufactured in PVC to IP68

    Operating temperature:- 0 50°C

    Operating Pressure:- 6 Bar at 25°C

    Power supply:- 12 VDC supplied by TU7685

    Weight:- 800 grams

    * Available with 2200°K Tungsten Light for use with USEPA 180.1 as required.

  • Features


    • Inline Turbidity Sensor for installation into pipework or a sample-line to give continous or online Turbidity measurements.
    • Nephelometric Turbidity measurements (ISO 7027 - EN 27027) give results in NTU. Ideal for water quality analysis.
    • Exceptional accuracy even at very low ranges, a resolution of just 0.001 NTU and a maximum scale of 4000 NTU all in the same compact design.
    • Connects to the TU7685 to give a visual indication of the Turbidity reading on the LCD (Liquid Crystal Display) as well as setpoint control, alarm relays and 4-20mA output.
    • The TU810 has no moving parts and requires minimal periodic calibration and maintenance.
    • Fully configurable from the TU7685 Turbidity controller to set ranges and to allow calibration of the sensor.
    • Designed specifically for precision measurements in drinking water analysis, raw water measurement, and for water treatment applications.
    • Available to meet United States Enivronmnetal Protection Agency standards (USEPA 180.1)
  • Data Sheets

    Data Sheets


More Information