TH10 Air Pressure Switches The TH10 pressure switches are used to ... two preset values on small (up to 175psi) electrically driven air compressors. They are available with an unloader valve, which prevents ... TH10-1H3 Min on (cut-in) PSI 25, 35, 50 Max off (Cut-out) PSI 100, 150, 175 Differential PSI 20 ... TH10-4H3 Min on (cut-in) PSI 25, 35, 50 Max off (Cut-out) PSI 100, 150, 175 Differential PSI 20 ...