Laser etching welding system is used to calibrate thick film printed circuits. This method provides accurate reading of actual oil pressure in vehicle's engine. High temperatures, polyimide film diaphragms are used in production for exceptional cycle durability and resistance to rupture and oil leakage. Units are designed to handle rapid pressure pulsations, without component damage. All units are 100% tested using automated equipment that activates the switch, checks for leaks and stresses the part to ensure specification compliance, even under the most demanding operating conditions. Robust design and high grade materials meet the stringent demands of today's service professional.