jmarkwolf
Junior Member level 3
automotive thermocouples
K-type thermocouples are commonly used for exhaust gas (EGT) and cylinder head (CHT) temperature monitoring in automotive and aviation applications. The sensors are commonly "grounded" at the thermocouple junction, through the screw-in plug (EGT) and spark plug ring (CHT), directly to the engine block and exhaust pipe.
Intuitively, I would think that this would introduce serious ground loops, and I would expect that the ignition and spark plug noise energy would wreak havoc on the micro-volt signal at the junction.
I have not found any discussion on this topic on the web. Can anyone direct me to a source for these topics?
K-type thermocouples are commonly used for exhaust gas (EGT) and cylinder head (CHT) temperature monitoring in automotive and aviation applications. The sensors are commonly "grounded" at the thermocouple junction, through the screw-in plug (EGT) and spark plug ring (CHT), directly to the engine block and exhaust pipe.
Intuitively, I would think that this would introduce serious ground loops, and I would expect that the ignition and spark plug noise energy would wreak havoc on the micro-volt signal at the junction.
I have not found any discussion on this topic on the web. Can anyone direct me to a source for these topics?