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 Using a proven flame ionisation detector (FID), the analyzer HC51M measures ambient air hydrocarbons (THC, CH4, nmHC) in the range 0-1000 ppm.

Available in 2 versions for the simultaneous and continuous measurement of:

  • THC (Total Hydrocarbons)
  • THC / CH4 / nmHC (Total Hydrocarbons, methane and non-methane)


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  • Measurements in the range of 0-1,000 ppm
  • Graphic Liquid Crystal Display (LCD)
  • Interactive menu driven software
  • Auto-ranging
  • User programmable ranges and time averages
  • Built-in storage of 1 year average data
  • Full remote emulation of the analyzer
  • Field proven technology and design
  • Option: internal zero air / external hydrogen generator, internal nmHC convertor / fluid drain
  • High sensitivity, stable, linear FID detector
  • LCD display with synoptic flow diagram display, real time calibration graph
  • Built-in serial interface (RS232/RS422)


    • Continuous indoor and outdoor air quality monitoring
    • Stationary and mobile AQMS laboratories
    • Industrial fence-line and field monitoring
    • Measurement of impurities in industrial gases (O2 or CO2)
    • Continuous emissions monitoring (CEM) by dilution
    • Measurement Campaigns and Monitoring Studies…

Measured parameterTHC / nmHC
TechnologyFlame Ionization Detector (FID)
US-EPA Approval / QAL 1 CertificationN/A
Measurement ranges0-10 ppm / 0-1000 ppm
Measurement unitsppb, ppm, µg/m3 (user-selectable)
Lower Detectable Limit (2σ)< 0.05 ppm
Noise (σ)0.025 ppm
Zero drift<0.1 ppm / 24h
Span drift< 1% / 24h
Linearity± 1% FS
Sample flow rate‘4.8L/h
Sampling pumpInternal
Temperature range+10°C to 35°C
Data storageLast 1500 average data
Included I/O3 AO/RS232/RS422
Weight (Kg)27
Dimensions mm (LxWxH)581 x 483 x 177
Chassis19″ Rack, 4U


    • Internal zero air purifier module
    • External air compressor
    • Internal converter for measurement of methane and non methane hydrocarbons
    • Special version for measurements in pure oxygen or in pure CO2
    • External H2 generator



    • Hydrogen : 0.04 L/min (2 bars)
    • Combustive air: 0.5 L/min (2.5 bars)


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