The 931 uses a sophisticated UV-VIS photometer to measure any single UV-absorbing gas species for process monitoring and control. Additional IR and thermal conductivity sensors capable of detecting non-UV absorbing species, such as CO2 and H2 can be incorporated into the design. The 931 is provided as an explosion-proof package making it suitable for most chemical and petrochemical applications. This analyzer uses AMETEK’s proprietary high-resolution UV-VIS technology which is completely free from water or hydrocarbon interference, maximizing measurement accuracy. A very flexible design, the 931 can be optionally equipped with additional sensors to add the capability to monitor CO2 and H2.