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ADT43 20XX Refrigerant Gas Semi-Conductor Sensor

Refrigerant gas transmitter with semi-conductor sensor for monitoring HCFC (hydrochlorofluorocarbon). The semi-conductor typical, non-linear signal is translated into a linear, temperature-compensated output signal. A comfortable calibration routine with selective access release is integrated in the transmitter. The ADT-43 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 leak detection in cooling systems with refrigerant gases as cooling agents (HCFC and HFC), such as cold-storage depots, ventilation systems, breweries, ice rinks etc. to assure the compliance with the requirements according to EN 378-3. Due to the standard output signal and the RS-485 interface, the refrigerant gas transmitter is compatible to the PolyGard gas controller series by MSR-E as well as to any other electronic control or automation system.


  • Digital measurement value processing incl. temperature compensation.
  • Linear output signal
  • Continuous monitoring
  • Low zero point drift
  • Good stability to poisoning
  • Semi-conductor sensor with long life-time
  • Modular plug-in technology
  • Comfortable calibration with selective access release
  • Reverse polarity protected, overload and short-circuit proof
  • (0) 4 – 20 mA / (0) 2 – 10V analogue signal output, selectable
  • Serial interface RS-485
  • IP-65 protected

Optional features:

  • Manual calibration via potentiometer
  • Manual addressing for RS-485 model
  • 4 – 20 mA analogue input for external AT transmitter Approved according to EN 61010-1; ANSI/UL 61010 1; CAN/ CSA-C22.2 No. 61010-1
  • Relay output
  • Integrated buzzer
  • LED flashlight
  • LCD display
  • LED status display
  • Heating
  • Duct mounting

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