Pressure Switch, Presair, DPDT, 21 Amp, 1-5 Psi, 1/8" NPT : PM21120A

Presair’s adjustable pressure switch is field adjustable from 1.5 inches of water to 125 Psi. The adjustable range is 10% to 25% lower on falling pressure, although special differentials are available. Dual pressures switches available and can be factory set to allow each snap action switch to operate at a different pressure setting.