This low pressure warning switch is perfect for turning on a light (sold separately) to indicate a loss of fuel pressure. The pressure is easily adjustable from 2 to 7 psi. Installs in any 1/8NPT port. Single terminal grounding type switch works with any of our warning lights or any other two-wire (non-grounding) warning light.
When the pressure is above the set point, the switch is open (circuit interrupted, warning light off)
When the pressure drops below the set point, the switch is closed (circuit completed, warning light on)
Note: This switch depends on an electrical ground to complete the circuit. When installed in a rubber fuel line, it will require a ground wire from the switch body to a ground on the chassis.