stephelton
Well-Known Member
I've got a thermowell with a dallas 1-wire probe in it. It is submerged in liquid that I keep potentially very cold (so far, as low as 27 degrees -- it's a mixture of glycol + water).
This morning I woke up to find that my system was failing to read from the 1-wire bus. Eventually I discovered that this was due to the buildup of condensation that had collected in the aforementioned thermowell.
This temperature reading is a pretty critical factor in my design. I need to come up with a solution to combat the condensation. I have a couple thoughts:
1) use some kind of epoxy / glue / cement at the bottom of the thermowell. This would prevent any of the electrical contacts from being exposed to air / water, which could also prevent oxidation and so on. The substance I use may also aid in heat transfer, which would give more accurate readings.
2) ensure that the chamber is air tight, and fill it with a gas with low moisture content. If this is really a viable idea, any thoughts on how I might do this? Would the CO2 I use for my kegs be appropriate? The only real advantage I see here is that I would be able to replace the probe if it ever needed to be done.
This morning I woke up to find that my system was failing to read from the 1-wire bus. Eventually I discovered that this was due to the buildup of condensation that had collected in the aforementioned thermowell.
This temperature reading is a pretty critical factor in my design. I need to come up with a solution to combat the condensation. I have a couple thoughts:
1) use some kind of epoxy / glue / cement at the bottom of the thermowell. This would prevent any of the electrical contacts from being exposed to air / water, which could also prevent oxidation and so on. The substance I use may also aid in heat transfer, which would give more accurate readings.
2) ensure that the chamber is air tight, and fill it with a gas with low moisture content. If this is really a viable idea, any thoughts on how I might do this? Would the CO2 I use for my kegs be appropriate? The only real advantage I see here is that I would be able to replace the probe if it ever needed to be done.
