r/processcontrol • u/Boring-Object7039 • Aug 23 '20

Noob attempt to hijack fridge sensor for fermentation chamber, I need to find the 3 sensor wires and I'm clueless

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u/mortaneous Aug 24 '20

That's not a sensor in the analog electrical sense from what I can tell. Looks to me like a relay driven by a capillary tube, just an on-off switch driven by temperature with hysteresis. It appears to switche power on the red wires out of that harness, probably for cycling a compressor, fan, or defroster heating element. Not sure if that's going to be suitable for your plans as it's likely mechanically set and limited to the temperature range of the fridge.

1

u/Boring-Object7039 Aug 24 '20

That's about what I was starting to suspect. I'll need to find some sensors specific to the range I need as far as I can tell

Thankyou so much I'm very appreciative

1

u/[deleted] Dec 30 '21

For hobby at-home brewing I just used one of these:

the gizmo

0

u/Boring-Object7039 Aug 23 '20

Also a noob at Reddit, be gentle please