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Gas Leakage detector for HVAC-R / FC

Molecular Leakage Detector for A1, A2L, A3 refrigerant gas based on ultimate MPS technology. Hydrogen Detection READY.

This refrigerant gas detector is a unique solution using the latest MPS (Molecular Property Spectrometry) technology to indicate the presence of low GWP A1, A2L and A3 refrigerant gas providing both a continous signal proportional to the gas concentration and the activation via relay for alarming once a prefixed (and settable) level is reached.
It combines all the advantages of MPS technology as in terms of long lifetime, no field calibration, built-in envirnomental compensation, no poisoning, wide temperature operating range and durability with a dedicated electronic board for easy interfacing the common control units thanks to the multiple outputs: Modbus, Relays and 4-20mA.

Replacing the inboard NevadaNano sensor, the MLD detector becomes the perfect solution for measuring hydrogen leakages in the fuel cell and in any hydrogen fuelled systems.


  • No field calibration
  • No cross sensitivity
  • Long life -time +10 years
  • Fail safe (built-in diagnostic)
  • A2L, A3 gas concentration 5-100% LEL
  • Hydrogen detection 0-4%
  • Built-in T and Rh compensation
  • Immune to poisoning
  • Operating range -40° to 75° C, 0-100% Rh
  • Modbus, Relays and 4-20mA Output (ALL IN ONE)
  • A1 gas concentration 400-2500ppm
  • Compact case version




Sensor Technology

Molecular Property Spectrometry

Sensor Type


Gas Detected

Refrigerant (A1 - A2L - A3) | Hydrogen (H2)

Measurement Range

5-100% LEL
400-2500ppm (A1)


+/- 3% LEL


Modbus, 4-20mA, Relays

Supply voltage

12VDC / 24VDC


9,8 x 4,8 x 2,2 cm

Operating temperature range

from -40 to +75 ºC

Operating humidity range

0 to 100 %RH

Applications Air QualityAutomotiveTruck, bus & HVORSafetyHVACResearch & Analysis
Type Gas Detectors


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