A medium duty heated Prefilter unit is installed in the 19″ Rack housing of the analysers. The Prefilter is fitted with a choice of either one (361) or two (362) filter streams (for either two sample points, pre/post cat or twin cells). The units incorporate a heated head sample pump, gas distribution needle valve manifold, back pressure regulator. The unit provides 3 heated outputs and 1 cold output to a chiller or cooler/dryer.
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
