124-2121, Telemecanique Sensors, Telemecanique Sensors Pressure Switch, 10 (Differential) psi, 5 (Decreasing) psi Min, 250 (Decreasing) psi, 49 Telemecanique Sensors Pressure Switch, 10 (Differential) psi, 5 (Decreasing) psi Min, 250 (Decreasing) psi, 49