Alternative Temperature Sensors
Posted: Wed Oct 29, 2008 2:43 pm
I was getting fed up with doing the pull up resistors on the "standard" resistance based temperature probes.
So on a whim, I took a torch to a VDO temp sensor to pull out the guts.
The result:
After cleaning with spray cleaner and a q-tip, the inside is nice a clean.
I've used a "one-wire" sensor (Digikey # LM19CIZ) before. Very small package, 5VDC supply and a voltage output before. Nice little sensor and currently about $1 at Digikey. The package is a TO92 and is about 3/16" or 1/4" inch cube.
After wired up and shrink wrapped:
I plan on potting the sensor in with epoxy and sealing with silicon.
I use the LM19s on my car now - Just epoxied them to the radiator water inlet and to a oil distribution manifold. The measured oil temp is pretty stable, but the water temp swings around a lot (as expected) depending on how fast I'm going (i.e., how much air is going through the radiator) - I knew that would happen, but not to the extent that it did.
So on a whim, I took a torch to a VDO temp sensor to pull out the guts.
The result:
After cleaning with spray cleaner and a q-tip, the inside is nice a clean.
I've used a "one-wire" sensor (Digikey # LM19CIZ) before. Very small package, 5VDC supply and a voltage output before. Nice little sensor and currently about $1 at Digikey. The package is a TO92 and is about 3/16" or 1/4" inch cube.
After wired up and shrink wrapped:
I plan on potting the sensor in with epoxy and sealing with silicon.
I use the LM19s on my car now - Just epoxied them to the radiator water inlet and to a oil distribution manifold. The measured oil temp is pretty stable, but the water temp swings around a lot (as expected) depending on how fast I'm going (i.e., how much air is going through the radiator) - I knew that would happen, but not to the extent that it did.