Fenwal 18002-21

Description

THERMOSWITCH® controllers control temperatures as low as -100ºF (-73ºC) and as high as 1100ºF (593ºC) with the proven dependability of over 65 years of service to satisfied customers. The THERMOSWITCH® controller is a strut-and-tube type thermostat comprised of two basic parts: the outer shell, made of high-expanding metal and the strut assembly, made of low-expanding metal. A pair of electrical contacts is mounted on the strut assembly and installed in the shell under tension or compression. Since each end of the strut assembly is mechanically connected to the ends of the shell, a net change of force is produced on the strut assembly as the shell expands or contracts with changing temperature. The temperature at which the contacts “make” or “break” can be regulated by a temperature adjusting sleeve.