The BZ-2RQ219-A22 BZ Premium Series switches are designed and manufactured for a wide variety of applications with over 75 years of experience. The internal flat-spring design is ideal for applications requiring precision switch characteristics and long life. These switches fit the standard 25,4 mm [1.00 in] mounting centers. Typical applications are: building controls and equipment, doors and lifts, semi-trucks and trailers, valves, industrial timers, communication systems, foot switches, commercial and industrial food service equipment, agriculture irrigation equipment and medical instrumentation. Operating temperature range is from -55 °C to 85 °C [-67 °F to 185 °F].