Snap disc pressure switch

摘要

A pressure switch is provided for opening and closing an electrical switch based on a pressure set point. The pressure switch includes a housing having walls defining a fluid chamber adapted to receive a fluid. The pressure switch also includes a snap disc having a front surface in pressure communication with the fluid chamber and responsive to switch states between first and second shapes. The pressure switch further includes a circuit board having printed circuitry and first and second electrical terminals. The snap disc has a rear conductive surface that forms a closed circuit between the first and second terminals when in the first shape and forms an open circuit when in the second shape.