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AWT420 Universal 4-wire, dual-input transmitter

Last updated: 3 Mar 2025
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Insertion-type, stainless steel electrodes AC221
Stainless steel electrodes enabling measurements down to 0.055 µS/cm ultra-pure water 3/4 in. BSP or NPT process connection Choice of 0.01 or 0.10 cell constants Integral Pt100 temperature sensor Maximum temperature 200 °C (392 °F)* Maximum pressure 20 bar (290 psi) Rapid temperature measurement T90 < 30 s Problem-free, integral, terminal-head or detachable cable connection Ingress protection IP 68
Digital pH sensors
- Our digital pH sensors offer improved process reliability. Patent-pending perpetual impedance diagnostics detect electrode faults in real-time without the need for a solution earth, while our smart Reference Electrode Monitoring (REM) system provides early warning notification of electrode poisoning. - By connecting your sensor to one of our digital transmitters, you can ensure that your sensor is replaced at the optimum time, saving money without risking process control. - Thanks to ABB’s EZLink fast connection technology, you can get quick and easy access to a full range of sensor data, including diagnostics, without the time and hassle typically associated with installing and commissioning sensing systems.
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