UPGN111-25412-1 is a Sensata pressure switch manufactured by Crompton Technology Group. It is a compact and reliable switch meets the highest industry standards. The switch can be used to turn on and off a circuit based on a preset low or high pressure, or vacuum, and is rated for a maximum pressure of 150 psi and a maximum vacuum of 25"H2O. It has a 1/4" NPT electrical connection, and an on/off differential of 20 psi. The UPGN111-25412-1 is rated for use in Class I, Div. 2, Groups A, B, C, D hazardous locations.