​The US EPA approved Serinus 10 Ozone analyser uses proven non-dispersive ultraviolet (UV) absorption technology to measure O3 in ambient air (LDL <0.5ppb, range 0-20ppm).

​The US EPA approved Serinus 30 Carbon Monoxide analyser uses proven NDIR gas filter correlation technology to measure CO in ambient air (LDL <40 ppb, range 0-200ppm)

​The EC9820 Carbon Dioxide Analyser combines microprocessor control with NDIR gas filter correlation photometry detection to measure CO2 with minimal interference from CO and H2O

​The US EPA approved Serinus 50 Sulphur Dioxide (SO2) analyser uses proven UV fluorescent radiation technology to measure SO2 in ambient air (LDL <0.3ppb, Range 0-20ppm)

​The US EPA approved Serinus 40 Oxides of Nitrogen analyser uses proven chemiluminescence technology to measure NO, NO2 and NOx in ambient air (LDL <0.4ppb, range 0-20ppm)

​The US EPA approved Serinus 44 Ammonia analyser uses proven chemiluminescence technology and an external thermal catalytic converter to measure to measure NO, NO2, NOX and NH3 in ambient air (LDL <0.4ppb, Range 0-20ppm).