Signal Group Ltd makes gas analysers for the professional testing of VOC, vehicle and engine emissions, the testing of tobacco smoke, impurities in special gases and emissions from power stations, catalyst efficiency, and boiler/burner combustion testing.
 
Since 1977 the company has been manufacturing state of the art high end reference gas analysers based on flame ionisation detectors, chemiluminescence, and a variety of non-dispersive infra-red (NDIR) technologies. 

Other peripheral equipment manufactured by the company contributed to the facilities to produce turnkey