The SGX Sensors VQ500 Series is a complete range of miniature, fully certified, flameproof sensor heads containing a high quality, low power pellistor pair optimised for the detection of combustible gases or % volume gases in thermal conductivity mode. They have an outline identical to modern miniature electrochemical cells and are ideally suited for use in portable instruments. Within the VQ500 Series there are specific sensors that are able to detect most combustible gases and vapours and ammonia at LEL levels. The thermal conductivity version will detect most gases at % volume concentrations which have thermal conductivities different from that of air.

Optimised for combustible gases and vapours
Thermal conductivity versions available
Certified explosion proof component
Integral pellistors
Low power
Standard miniature body size
Poison resistant – silicones and hydrogen sulfide
Shock resistant, ATEX certified, IECEx certified, CSA certified
UL recognised
Temperature rated between -40°C and +55°C