... service Introduction:SA-50KZY differential pressure switches can sense the pressure difference , vacuum, over pressure, poor flow of the incorrosive ... , 1 L-bracket, 3srews, 2 pressure-adapted tubes. Caution:+ The Pressure Switch should be mounted vertically which can prevent ... number of the control .this number can be found on the side of the control. Differential pressure control switch SA-50KZY