Currently, I am prototyping my PID software for what will (hopefully) become part of my electric rig controls and found something odd.
I have three temperature reading devices and all three are registering a different temp:
A digital aquarium thermometer: 76.3
A digital cooking thermometer: 78.8,
and a thermoresister (DS18B20) using Dallas 1-wire and an Arduino board: 75.5.
Supposedly the thermoresister is accurate w/in +-.5 degrees.
I realize that it is silly to expect them all to be in agreement, but this does beg the question of which is correct. Also makes me reconsider using this as my temp probe. Then again, some basic testing suggests that the DS is hypersensitive (which should be a good thing).
Any thoughts?
I have three temperature reading devices and all three are registering a different temp:
A digital aquarium thermometer: 76.3
A digital cooking thermometer: 78.8,
and a thermoresister (DS18B20) using Dallas 1-wire and an Arduino board: 75.5.
Supposedly the thermoresister is accurate w/in +-.5 degrees.
I realize that it is silly to expect them all to be in agreement, but this does beg the question of which is correct. Also makes me reconsider using this as my temp probe. Then again, some basic testing suggests that the DS is hypersensitive (which should be a good thing).
Any thoughts?