The device measure the temperature, oil pressure, alternator charge, running engine.
In case of fail, informt it to the GPS module and generate a progressive engine shtudown for 25 secconds, and after that go to permanent off to the engine.
Using differents signals inform to the GPS module the following:
-Engine is running
-Oil pressure fail
The temperature output is a analog signal that represent temperatures between 70°c(158°f) a 123°c(253.4°f) con un voltaje de 0~2.5V
Do not need open coolant circuit, only must touch the probe with engine. Also do not need break or modify the original sensors of car.
Economic, small and efficient.