Temperature Monitoring in Activated Sludge

temp. monitoring in activated sludgeWaterTechw² D062 Temperature Sensor

The WaterTechw² D062 Sensor has been specifically designed to monitor temperature in wastewater and industrial effluent treatment applications. The result is a robust, accurate, easy to use and stable temperature measurement system. The sensors are filled with a special cast resin that protects against moisture. As standard, the sensors are fitted with 10 metre cable, but they can be supplied with other lengths on request.

The sensor within the probes consists of a metal cylinder containing the thermistor network. This sensor tip is fitted to a black plastic housing. The sensors are designed for use between -5ºC and +45º. The accuracy of the measurement is +/- 0.2ºC. The sensor requires very little maintenance, with no special tools or training required. The sensor has been factory calibrated so does not require further calibration, however a verification process is available to ensure that the system is reading accurately.

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  • Temperature measurement in wastewater applications provides an important back up to measurements such as pH, Dissolved Oxygen, Suspended Solids and Turbidity. In activated sludge, temperature can be related to the ability of the biological treatment system to cope with varying loads. In Final Effluent many discharge consents are waived when the temperature reaches a low level of around 4ºC and by using a verifiable temperature measurement device such as the WaterTechw² D062 the operator can avoid issues with regulators.

    The WaterTechw² D062 is supplied in two parts, an IP68 transmitter and an IP65 interface unit to provide a connection to the 7300w² Monitor. A blind 4-20 mA output version of the sensor is also available.

  • Physical
    Dimensions (hxwxd) Transmitter: Ø21.5mm, 188 mm long
    Interface: 120 x 90 x 50 mm
    Protection Class Transmitter: IP68
    Interface: IP65
    Enclosure Material Transmitter: Polyoxymethylene (POM)
    Interface : ABS
    Cable Entry Transmitter: Integral Cable Gland
    Interface: 2x M12
    Cable Length Transmitter:10 metres standard, 100 metres maximum
    Interface to Monitor: 1 metre standard, 100 metre maximum

    Interface to Monitor
    Power Supply 12 VDC from Monitor
    Sensor Output ModTechw², RS485

    Environmental Data
    Storage Temperature -5 to 60ºC
    Location Indoor/Outdoor
    Maintenance
    Service No routine service
    Calibration The sensor is inherently stable, calibration should be carried out to suit the application. Our recommendation is every 12 months.

  • Measuring Characteristics
    Principal of Operation Thermistor
    Accuracy Better than +/- 0.2°C
    Display Resolution see 7300w² Monitor
    Response Time 0.5 seconds
    Flowrate Not affected by flowrate
    Units °C
    Range -5 to 45°C

  • Part Number with Description
    225941 WaterTechw² D062 Sensor (Range -5-45°C, Cable Length: 10 metres)
    Mounting Shaft
    223441 FlexTech Shaft Assembly with bracket (WaterTechw² D062 Sensor, 2.0 metres)
    Mounting Brackets
    223980 FlexTech Sensor Bracket (Handrail Ø40 to 60.3 mm)
    224567 FlexTech Extension Bracket Assembly (500mm Long, Handrail Ø40 to 60.3 mm)



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