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FID Analyzer

For measuring: Total hydrocarbon (THC) and methan (CH4) | VOC

FID Analyzer

The TRACE-GAS FID analyzers have been developed for the detection of total hydrocarbon concentration in exhaust gases. The measuring principle of flame ionization detection is based on the ionization of organically bound carbon atoms in a hydrogen flame.

Depending on the version (FIDmono/FIDdual), the analyzer allows continuous monitoring of the total hydrocarbon and methane concentration in the sample gas. The combination of the two measured values in the FIDdual also offers the possibility of determining the proportion of non-methane hydrocarbons (NMHC). The analyzers are very robust and have a very high sensitivity and linearity.

FID mono

The FID mono is an analyzer for the detection of total hydrocarbons (THC). The single-channel design of the instrument contains a combustion chamber in which hydrocarbon compounds can be detected according to the flame ionization principle. No breakdown of the various HC compounds in the sample gas is performed.

FID dual

In addition, the TRACE-GAS analyzer is also available as FIDdual. The dual-channel design allows not only the measurement of total hydrocarbon (THC) but also the detection of methane (CH4) in a second combustion chamber. For this purpose, long-chain atoms are reduced by a thermal cutter so that only methane remains in the sample gas for measurement. This analyzer thus offers the additional possibility of determining the difference between THC and CH4, which is also referred to as the concentration of non-methane hydrocarbons (NMHC).

Automatic ignition of the hydrogen flame

Automatic hydrogen shutoff

Minimal calibration effort

Optimized for continuous operation

Heated analyzer

Continuous measurement

Very high dynamic range

Extremely high linearity over wide concentration range

Simultaneous measurement of THC and CH4 using cutter technology (FID dual)

Flame ionization technology

Application fields


Emission montitoring

  • Continuous emission monitoring (exhaust air purification plants)
  • Immission measurement

Monitoring of processes and ambient air

  • Leakage detection (plant monitoring)
  • Indoor air monitoring – limit value monitoring ( threshold limit value (TLV))
  • Methane gas monitoring at landfills (explosion protection)


  • Raw gas measurement on vehicles/exhaust gas measurement automotive


  • Semiconductor industry – Detection of hydrocarbons in clean gases
    Waste water monitoring

Technical Data

Technical Data
Dimensions (L x W x H)19″ 3 HU (543 x 485 x 143 mm)
Sample gas flow 0,5 – 1,5 l/min1
Weight≤ 25 kg (ohne Betriebsgase und Energieversorgung)
Ambient pressure 700 to 1.013 mbar
Operating temperature5 – 45°C (non-condensing)
Communication Modbus TCP/IP + analog output 4 – 20 mA (optional)
Power supply 100 – 240 V AC / 50-60Hz
Auxiliary and fuel gases
(externally required)
Combustion air: synthetic air
Fuel gas: He/H2 (40% hydrogen, rest helium)
Display7″ LCD (Touchscreen)
1 depending on inlet pressure


Measuring range (FS)2THC: 0-30.000 ppmC1
CH4: 0-10.000 ppmC1 (only dual)
Limit of detection (LOD)3 @t90 (with electronic t90time = 20s)
≤ 1% FS (4σ)
Response time< 3s
Linearity± 2% of the measured value or ± 0.3% FS
Zero drift≤ 1,5 ppm C1
Span drift (sensitivity drift)≤ 0.5 % of the measured value in 8h
2 other measuring ranges on request
3 at constant ambient conditions (temperature, gas flow, inlet pressure)

Need help?

We gladly help you select the perfect gas analyzer products for your needs. Talk to us about gas analysis technologies and our FID gas analyzers or FID OEM sensors for monitoring total hydrocarbons (VOC).