G40 Corrosion in thermocouple plug
I've used my G40 for about 3 months continuously now but then I noticed that by temperature readings were jumping around. On close inspection the reason was clear, the terminal contacts had corroded.
It is because condensation is occurring inside the housing, and probably expected given I am setting my cold bath at -4C, fermenting at 11C and cold crashing at 3C in a humid environment. It is clearly causing corrosion over time. You can see from the photo how nasty it is, and I've tried cleaning to no avail.
IMHO this is a serious design fault. The probe contacts should not be exposed to water at all, yet the thermocouple plug and receptacle are right above the cold flow lines. Condensation in there will be inevitable.
Its lucky I am not using all 4 pumps (I am using 2 only), so I've switched to a spare for now. The only solution I see is to regularly change out the probe and the receptor.
Kegland, I'd be grateful for a solution, soon I will run out of receptacles for the thermocouple. I did think about sealing with silicone once the probe was plugged in, but would be concerned I could just make it worse if humid air can ingress from elsewhere.