Sontay revised range of thermostats are well suited for a number of applications of temperature control or safety cut-out in pipe work systems, calorifiers, duct work systems, green houses and many other installations. They all have the set-point adjustment under the cover to prevent unauthorised tampering. They are available in two types; 1.) Control thermostats (auto reset) - with an adjustable set point, adjustable differential and auto rest, which provides a switched output to a heater or controller. 2.) Safety thermostats (manual reset) - with an adjustable set-point, fixed differential and manual reset, which provides high limit cut-out on boilers etc.