• Product image of WTW's DIQ/S 281-CR2 Universal Monitor (pH measurement)
  • Product image of WTW's DIQ/S 281-CR2 Universal Monitor (conductivity measurement)

Universal monitor DIQ/S 281 - WTW

  • SKU: 472103
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  • Description

    Universal monitor DIQ/S 281. The new system 281 – the digital and cost-efficient single parameter measuring point with proven IQ Sensor Net technology and IQ sensors for the standard parameters. Low-cost alternative to analog measuring points

    The System 281 combines the known performance of analog products with the advantages of the digital IQ Sensor Net:

    • Proven and reliable IQ Sensor Net technology
    • 100 % IQ Sensor Net look & feel
    • Versions with analog outputs, Modbus RTU and HART available
    • 2 relays for alarm for main and secondary value
    • You can easily upgrade to DIQ/S 282/284, since IQ sensors can be retained
    • Free software updates with new features
    • Stable, robust and proven measuring technology

    Measurement Parameters:

    Matching digital IQ sensors for pH/ORP, conductivity, D.O., turbidity, suspended solids and sludge level (also as seawater version for corrosive media)


    DIQ/S 281-CR2 with power supply via a wide range power supply unit (100-240VAC), 2 analog outputs (0/4-20 mA) and 2 relays
    DIQ/S 281-CR2/24V with 24V power supply, 2 analog outputs (0/4-20 mA) and 2 relays
    DIQ/S 281-MOD with a wide-range power supply unit (100-240VAC), MODBUS interface (RS 485) and 2 relays
    DIQ/S 281-HART with a wide-range power supply unit (100-240VAC) and 2 relays

    Made for many applications:

    Once developed for wastewater the IQ Sensor Net is also successfully applied in drinking water applications and the process industry for many years. Try it yourself! Some examples:

    • With SensoLyt® 700 IQ for different pH ranges in drinking water
    • With VisoTurb® 700 IQ, the turbidity sensor with ultrasonic cleaning in the wwtp outlet
    • With the calibration free dissolved oxygen sensor FDO® 700 IQ in the aeration basin
    • With TetraCon® 700 IQ, the 4 electrode conductivity cell in the process industry
    • With the suspended solids sensor ViSolid® 700 IQ with ultrasonic cleaning in the aeration basin of a wwtp with industrial wastewater
    • With IFL 700 IQ, the ultrasonic sensor for detailed presentation of sludge profile in the post-sedimentation
  • Specifications
    Controller DIQ/S 281-CR2 DIQ/S 281-CR2/24V DIQ/S 281-MOD DIQ/S 281-HART
    Order No. 472103 472104 472105 472106
    Icon: CE Product Certification for Xylem Analytics Products   Icon: UKCA Product Certification for Xylem Analytics Products   Icon: Xylem Analytics Products that is cETLus listed by Intertek       detailed technical data see data sheet D1.09
    Max. number of sensors 1
    Connectable sensors IQ sensors for pH/ORP, O2, conductivity, turbidity, TSS or sludge level
    Communication 2 x (0) 4–20 mA2 x relays Modbus RTU
    2 x relays
    2 x relays
    Cable length sensor 100 m fixed cable
    Max. total cable length 250 m
    Power supply Wide range mains converter (100-240VAC) 24V Wide range mains converter (100-240VAC)
    Connectable modules DIQ/CHV (Cleaning Head Valve), DIQ/JB and MIQ/WL PS SET


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