The 20PS000EN420K350R is a pressure switch made by Sensata. It is a heavy duty pressure switch with a single-pole double-throw (SPDT) contact arrangement, and it is suitable for liquid and air applications. The 20PS000EN420K350R features an adjustable differential pressure range of 20-400 psi, a current rating of 10A, an operating temperature range of -20°C to 85°C, and an IP68 ingress protection rating. The switch is actuated when pressure is applied to the sensing port, and the output contacts are operated accordingly. The 20PS000EN420K350R is a rugged switch designed for applications such as boilers, pumps, compressors, and air systems.