This compact 3 U high 19” rack enclosure houses both the NOx converter as well as a self contained heated filter and calibration gas selection valve. It is generally used with the Signal Group S4 PULSAR multi-gas analyser or to check converter efficiencies.
FID: the VOC emissions monitoring reference method – for over 50 years!
The Flame Ionisation Detection (FID) method was first developed in the 1950s for the laboratory analysis of organic chemicals. Later, when environmental regulations began to limit the emissions of volatile organic chemicals (VOCs) in the 1970’s and 1980’s, the FID method was adapted for emissions monitoring. Signal Group was one
09/04/2025
