... 3-Phase pressure switch, pressure control 3-phase, air compressor switch, air compressor switch, air pump switches The FB-18(3-Phase) pressure switch is ... " or G1/2" Femle N.C. Other Pressure Settings and Differential Pressure are available on request.Conversion: 1Mpa =10bar,1bar ... = 14.5PSI,1Kgf/cm2 = 14.2PSI 3-phase pressure switch for air ...