This weekend I've managed to get the RIMS tube mounted, along with the pump, to the underside of my brew table. These pictures are my solution to mounting the DS18B20 temperature sensors that are available on ebay. These are the ones that come pre-wired with a 6mm SS probe tip. I wanted to avoid a thermowell as this would further slow the heat transfer from the medium to the sensor. Before I got them I wasn't sure if I'd strip off the SS tip and insert the bare component into a thermowell or use them as is. Turns out the solution was easy enough with my tools and the bits n bobs floating around in my fittings junk box. The only thing I needed to buy for this small aspect of the project was some more lead free plumbing solder ($21 but it will last for quite a few more projects).
The purple washer was cut from a silicone oven mitt that has provided me with numerous flange gaskets over the years
. I used a 1/2 tube offcut to punch out a piece and then a smaller tube to punch the hole in the middle. Once screwed in the washer compresses and forms a seal around the probe.
I drilled a 1/4" hole in the elbow to allow a little bit of clearance, and I needed to enlarge the hole in smallest hollow threaded fitting.
Then I filed a flat face on the elbow so I could solder the small hollow fitting. I used a butane torch, lead free plumbing solder and water soluble flux.
It all took a bit of time, but it was man-cave time, so time well spent IMHO :lol:
If you have a close look at this last pic you can see the SS probe tip protruding into the path of the flow. I reckon this is the perfect place to ensure I'm getting an accurate and fast temp reading. Faster response (I hope) because the flow rate past the sensor with be increased as it squeezes through the narrower gap and this should improve the transfer of heat from the wort to the tip.
Opinions?
Cheers
Peter