Fixed or permanent gas sensors must be chosen for the specific application. Browse our extensive range of fixed gas sensors for individual gases and applications including Ex rated and for safe areas. Standard 4 to 20 mA outputs are provided and digital displays are available in our Xgard Bright range.We provide a wide range of sensors that are easy to install, rugged, reliable and have a low cost of ownership. Please contact us if your gas is not shown. CSL sell and service all our gas detectors.