Weiss Series TSG, Temperature Switch Gauge offers an unprecedented blend of industrial - strength performance with unequaled accuracy. This 6" gas actuated thermometer is accurate to within 1 1/2% of scale and can endure up to 50% over range temperatures. Secured inside the rugged stainless steel case are up to four single pole, double throw 10 amp switches for enabling a variety of switching functions. The thermal system, also stainless steel, is filled with inert nitrogen and is non toxic, which makes the Series TSG an excellent choice for many types of industrial and process applications.