Ryde _Or_Die

Ok what exactly would be electronic about an egt gauge? I mean does that mean it doesn't have a probe or what? I just figured they were all mechanical or whatever.

RETed

EGT's normally use a K-type thermocouple, which is basically a thermistor - a resistor that changes resistance depending on temperature.&nbsp To measure this resistance, "meters" typically shoot a voltage into the sensor and record voltage off the other side - by monitoring the output voltage, you can deduce resistance, which in turn calibrate this to a known table of values to which to you can apply to a gauge readout...



-Ted

Ryde _Or_Die

So electronic egt gauges have probes right? They aren't like hooked up to the stock O2 sensor or ecu or anything right?

Scott 89t2

probe, you need another hole in your exhaust.

NZConvertible

Not quite right. A thermistor is, like you say, a resistor that changes resistance with temperature, but a thermocouple is quite different. It actually generates a voltage, caused by two dissimilar metals joined at the probe's tip.
Just keepin' ya honest!

RETed

Oops, should've seen that coming - too much Vegas buffet last night!



-Ted