This SPDT (Single Pole Double Throw) switch is factory-set to a

making it effective for staging exhaust fans and small pump motors

you can always uprate the voltage (e

a different alloy sensor must be used to prevent chemical erosion of the pressure sensor internally

MARS 43304 Pressure Switch 318820-201 This SPDT (Single Pole DoubleThe MARS 43304 Pressure Switch is a high performance SPST condenser fan cycling switch engineered for modern HVACR systems, specifically optimized for R410A applications. Operating on a close on rise logic, this switch features a factory set 225 PSI cut in and 150 PSI cut out (Open Fall), providing precise low ambient head pressure control. Designed for direct mounting via a 1 4 inch female flare S. A. E. connection with an integrated internal