Total Hydrocarbons FID Analyzer


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)”

  • 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…
Technical specifications
Measured parameter THC / nmHC
Technology Flame Ionization Detector (FID)
US-EPA Approval / QAL 1 Certification N/A
Measurement ranges 0-10 ppm / 0-1000 ppm
Measurement units ppb, 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 pump Internal
Temperature range +10°C to 35°C
Data storage Last 1500 average data
Included I/O 3 AO/RS232/RS422
Weight (Kg) 27
Dimensions mm (LxWxH) 483 x 581 x 177
Chassis 19″ 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)