• WTW-472103-DIQS281-front-pH_screen.jpg
  • WTW-472103-DIQS281-front-Cond_screen.jpg

Universal monitor DIQ/S 281-CR2 - WTW

  • SKU: 472103
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  • Description

    Universal monitor DIQ/S 281-CR2. 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
    • 2 mA for main and secondary parameter
    • 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
    • Matching digital IQ sensors for pH/ORP, conductivity, O2 and turbidity
    • Stable, robust and proven measuring technology

    With the system 281, WTW offers a digital and cost-effective alternative to analog measuring points. Our IQ sensors (also as seawater version) are available for the parameters pH/redox, conductivity, oxygen or turbidity.

    You will receive a cost-effective measuring point with proven WTW IQ Sensor Net technology. In addition to the power supply via a wide range power supply (100-240VAC) or via 24 V, 2 current outputs and 2 relays are also available.

  • Specifications

    Max. number of sensors

    1

    IQ Sensor Net connections

    1

    Outputs

    2 x (0) 4 ... 20 mA, 2 x Relays

    Display

    Graphic TFT Display; Resolution: 320 x 240 pixel; backlit

    Control Functions/
    Function Keys

    5 operating keys: measurement (M), calibration (C), set/system settings (S),
    3 master keys for functions:
    2 keys for: confirmation/switching menu O.K. (OK), escape (ESC)
    Arrow keys for rapid selection of software functions and input of alpha-numeric values (up), (down)

    Electric Supply

    100 … 240 VAC (50/60 Hz), 24 V AC/DC

    DIQ Modules

    DIQ/JB and DIQ/CHV

    Cable Feeds

    4 screw cable glands M 16 x 1.5 (expansible to M 20 if required)

    Terminal Connections

    Screw terminal strips; Terminal area for solid conductors: 0.2 ... 4.0 mm2
    Terminal area for flexible conductors: 0.2 ... 2.5 mm2; accessible by opening cover

    USB interface

    USB-A for software updates

    Ambient Conditions

    Operating temperature: -4 °F … 131 °F (-20 °C … +55 °C); Storage temperature: -13 °F … 149 °F (-25 °C … +65 °C)

    Housing Material

    PC – 20 % GF (polycarbonate with 20 % fiberglass)

    Protection Rating

    IP 67 / corresponding to NEMA 4X (not for direct conduit connections). Conduits need to be connected with flexible adapters (CC-Box), respectively with adapters CC-PM..

    Dimensions (W x H x D)

    144 x 144 x 125 mm (5.67 x 5.67 x 4.92 in.)

    Weight

    Approx. 1,2 kg (2.6 pounds)

    Certifications

    CE

    Electromagnetic Compatibility

    EN 61326-1, Class A; FCC Class A

    Integrated Overvoltage Protection

    According to EN 61326-1 enhanced overvoltage protection for the entire system

    Connection Medium Cable

    IQ Sensor Net cable SNCIQ or SNCIQ/UG (underground cable with additional PVC coating): 2-wire with shield; 2 x 0.75 mm2; filler cord for easy connection of shield: 0.75 mm2; pressure resistant to 10 bar

    Connection Characteristics

    Power supply and data transmission on these wires; resistant to polarity reversal with respect to switched shield and inner conductor (no damage); comprehensive EMC shield control; Cable topology within the IQ Sensor Net system as required, e.g. in the form of a line, tree, star; total cable length max. 250 m (273 yds)

    Warranty

    3 years for defects of quality

Downloads

IQ SENSOR NET System 281

Titelseite of WTW's Flyer zum System 281Flyer, 4 pages, German, 999148D
"Das System 281: für pH/Redox, Gelöst-Sauerstoff, Trübung oder Leitfähigkeit - einfach, digital, modern"

IQ SENSOR NET System 281

Cover English Product Flyer of WTW's IQ SENSOR NET System 281Flyer, 4 pages, English, 999148US
"The System 281: for pH/ORP, Dissolved Oxygen, Turbidity or Conductivity - simple, digital, modern"

IQ SENSOR NET System 281

Datasheet D1.09, German, 999215D
for IQ Sensor Net System 281

IQ SENSOR NET System 281

Datasheet D1.09, English, 999215US
for IQ Sensor Net System 281

IQ SENSOR NET System 281

Title page of WTW's product Flyer Flyer, 4 pages, French, 999148FR
"Le système 281 : pour pH/Redox, l'Oxygène dissout, la Turbidité et la Conductivité – simple, numerique, moderne."

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