Made of material, durable, reliable oil pressure part, replacement for the old or broken oil pressure sensor.. Easy installation and maintain, just tighten the threads, the thread is 1/8-27 NPT. Wiring: case for grounding. S for resistance output, 10 - 180 ohms; WK for low pressure (30 psi) warning output, it is a switch to ground (case). 30 psi alarm is the best (20%) point for 150 psi pressure sender.. When pressure is bigger than 30 psi, the switch will be open. When pressure is smaller 30 psi, the switch will be closed, or connect to ground..
