When natural gas is pumped up from a well, it is saturated with water vapour (H2O) .  It will also have considerable amount of undesirable gases such as Hydrogen Sulfide (H2S).  As such, the gas must be treated and dried below a specific moisture content before the natural gas producer and pipeline companies buy and sell natural gas.

Biogas is a renewable energy source produced by breaking down waste organic materials through anaerobic digestion and capturing the resulting biogas for reuse. The captured biogas can be used in a variety of valuable ways including local heating and power generation, as fuel for natural gas vehicles, or sold to natural gas utilities and injected into their pipelines in the form of biomethane. Depending on the end use of the biogas, it must be conditioned or upgraded to different levels of purity by removing contaminates such as Hydrogen Sulfide (H2S), Oxygen (O2) and Moisture (H2O).

Monitoring these gas constituents is important for process optimization and control in these industries as well as verifying the gas quality at custody transfer points and monitoring the operation of the Moisture (H2O) and Hydrogen Sulfide (H2S) at these pretreatment equipment.