trulyalya Posted October 1, 2014 Share Posted October 1, 2014 sorry for bringing that back to life. having reached consensus regarding the thread naming convention, the next step is to finally understand its operation. does it actually close or open the electric circuit after the system reaches that 7psi pressure? in my understanding of proper designing mission-critical devices, it should close the circuit under normal operation (broken wire would mean open circuit which generally should give a signal the circuit in the instrument cluster to switch on the lamp, right?) thinking of adding an extra oil pressure sensor for the gauge, and may be an oil temperature sensor, but the latter would probably require welding in a bung on a sump? Quote Link to comment Share on other sites More sharing options...
Team Idris Posted October 1, 2014 Share Posted October 1, 2014 Its called NC for normally closed. It opens the contacts at 7psi or whatever the pressure is on the device. You mean normally open 'NO' for critical parts. Then a low pressure or a broken wire shows a fault 'open circuit' condition. Then you would have a green oil light, for good-oil-pressure. And maybe it wires through the coil or stop solenoid to kill the engine? (boats). In aviation you seem to have warning alarms and lights rather than cut outs, so that a stuffed engine may still get you to safety. No point saving the engine if it vaporises on the side of a mountain Quote Link to comment Share on other sites More sharing options...
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