engine hour sense

Hi All,

I need to know if there is a Positive or Negative Trigger that I can Tap into so I know that the Engine is running.

I work for a GPS Manufacture and our Locators can sense Ground from an Input. (Digital).  Simple Installation through Ignition, Constant, Ground, BUT, I have a Request to MONITOR Engine HOURS.....Like on a Boat or Farm Tractor....So, what do I tap into to know if the Engine is running or not. a Grounding Output from something connected to a Pully would be Beautiful or something beter in a Cab.

Love to hear your thought.

Take Care

DARK-NEMESIS

What we use on aircraft are simple pressure switches connected to a pressurized oil line.  Very simple if you could tap into something like an oil cooler or trans cooler line (or something similar). Simply run power through the switch. You should be able to find a switch at any auto parts store.

Might be a little pain to install on a vehicle though. Just an idea anyway. Good Luck.

Thank you for the Reply from all, these are all great thought.

We do use a Air Pressure Switch Part #: Honeywell Hobbs:

http://www.aircraftspruce.com/catalog/inpages/hobbsswitch.php

BUT, simplicity is a Key Factor, so, what about something in the CAR?

Thanks in advance.

Take Care