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ADT53-1185 Formaldehyde CH2O Transmitter

CH2O transmitter including digital measurement value processing and temperature compensation for the continuous monitoring of the ambient air to detect formaldehyde concentrations. Integrated in the transmitter there is a comfortable calibration routine with selective access release. The ADT-53 possesses a standard analog output (0) 4- 20 mA or (0) 2– 10 V DC, and an RS-485 interface. 2 relays with adjustable switching thresholds are available as an option.

For the detection of formaldehyde within a wide range of industrial and commercial applications. Due to the standard output signal and the RS-485 interface the CH2O transmitter is compatible to the PolyGard Gas Controller series MGC and DGC by MSR-E as well as to any other electronic control or automation system.


  • Digital processing of the measurement values incl. temperature compensation
  • Continuous monitoring
  • Low zero point drift
  • Good stability to poisoning
  • Long-life sensor
  • Modular plug-in technology
  • Easy maintenance
  • Comfortable calibration with selective access release
  • Reverse polarity protected, overload and short-circuit proof
  • (0) 4 – 20 mA / (0) 2 – 10V analog signal output, selectable
  • Serial interface RS-485
  • IP65 protected
  • Manual calibration via potentiometer (option)
  • Manual addressing for RS-485 mode (option)
  • 4 – 20 mA analog input for an external AT transmitter (optional)
  • Approved according to EN 61010-1; ANSI/UL 61010 1; CAN/CSA-C22.2 No. 61010-1
  • Optional: relay output / integrated buzzer / LED flashlight

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