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Model RM4000
Ammonia, HCFC-123, HFC-134a, HCFC-122, CFC-11, CFC-12


  • continuous single or multi-point monitoring for fast detection of small leaks (down to 1 ppm ± 1ppm) in chiller plants
  • monitoring of : Ammonia, HCFC-123, HFC-134a, HCFC-122, CFC-11, CFC-12
  • meets ASHRAE 15-1994 standards and provides early warning for EPA 608 violations.


Key Features

  • high accuracy, multi-channel infrared sensing (IR) of specific refrigerants
  • can be tuned to a wide variety of refrigerant signature
  • large display of refrigerant concentration.
  • Pump sampling system allows for sampling from 1 to 11 points
  • can detect and identify up to 3 refrigerants simultaneously
  • automatic zero calibration function maintains long term calibration for years
  • IR sensor can be field replaced to change or expand refrigerants detected
  • Now also available with LonWorks® communication capability as a LonMark® Certified product.



  • Alarm horn & beacon
  • Remote alarm panel
  • Remote digital display
  • Sample heater assembly for applications where temperatures are below 50ºF
  • Windows based software interface (RS485 or RS232)

Ammonia, HCFC-123, HFC-134a, HCFC-122, CFC-11, CFC-12


Model RM4000

Refrigerant Sensor

  • Temp Range :32 to 104ºF (0 to 50ºC)
  • Measurement Range: 1-100 or 1-1000 ppm
  • Lower Limit Of Detection: 1 ppm
  • Sensitivity: 1 ppm
  • Reproducibility ±1 ppm over 12 months
  • Response Time: T90 in 20 seconds.
  • Output: Relay or 4-20 mA
  • Power: 85-230 VAC

Published: February 16, 2004 Last Updated: June 5, 2008