Press Swtch 1-18N.
3-12 Diff Ra N. Swtch, Pressure Setpoint Type Adjustable, Pressure Type Differential, Maximum Pressure Setting 7 psi, Minimum Pressure Setting 3 psi, Maximum Differential Pressure Setting 12 psi, Minimum Differential Pressure Setting 3 psi, Input Voltage 240V AC, Overall Height 2 5/16 in, Overall Width 2 1/4 in, Overall Depth 3 5/16 in, Standards CSA Certified, UL Listed Press Swtch 1-18N.