Gas quality has always been an important issue, but within the last several years it has become a critical issue for many pipeline companies. When gas prices hit historical high levels in the winter of 1999-2000, anybody who had the ability to sink a well and start pumping natural gas did so. Unfortunately, gas quality has taken a back seat to the urgency of fulfilling energy requirements. We are now seeing the effects of this push to get as much gas into the system as possible with out regard for overall quality. One of the key quality factors is moisture content. This paper will review the different sensor technologies in use today and also address key issues and proper procedures in assembling a sampling system to provide a clean, representative gas sample to the sensing device