Flame Ionisation Detector (FID) Total VOC Launched

5th November 2020

Protea’s Flame Ionisation Detector (FID) analysers allow for Total VOC analysis from a range of emissions, process, exhaust and ambient air applications. Protea’s Flame Ionisation Detector (FID) analysers are used to give quick, accurate measurement of Total VOC concentration in a range of applications such as emissions and process control and offer MCERTS EN 15267-3 QAL1 certification. Find out more at https://www.protea.ltd.uk/fid-total-voc

Protea’s Flame Ionisation Detector

Within the FID analyser chamber is a Hydrogen (H2) flame burning in an electrical field. The flame is fed by high purity fuel gas (atmosFID can use H2 gas or a H2/He mix) and a hydrocarbon (HC)-free combustion air. The sample gas to be analyzed is then also fed into this flame. The hydrocarbons within the sample gas are "cracked" in the flame and the resulting HC fragments are then ionized. An ion current in the order of 10-14A is generated in the electric field; this electric current is related to a DC amplifier and gives the detection of the HC content.

The measuring method requires that the measuring signal is proportional to the number of non-oxidized carbon atoms in the sample gas. Carbon atoms that are pre-oxidized are only partially measured. This phenomenon is expressed by the response factor (RF) of various hydrocarbons. Protea can provide a complete response factor list for the atmosFID.