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I've searched the forums and several website but can't seem to find digital thermometers with alarm that fit the 4mm thermowells. I want to have an alarm sounding when the still has warmed up, if the water output overheats et cetera. Does anyone have a product name/type or webshop address, preferably within the EU?
Comments
Not in EU, but this is what I use.
1/16 DIN Dual Channel Temperature Meter For Brew Panel
1/16 DIN Dual Channel Temperature Meter For Brew Panel @ Auber Instruments
@medstiller. That is a nice one - wish we could get in Australia for a good price.
There are plenty of PID controllers you can buy on eBay where you just use the display and alarm functions. You can change the sensor input between thermistor or thermocouple in the setup. These are a good price but only display one temp. Your problem will be getting a Rtd probe in 4 mm. Rtd is much better and it is probably time Stilldragon reconsidered its thermowell size. Speaking without knowledge there as I have not used the wells as I use double compression fittings and weld the base in situ where I want them. The most common Rtd probe is 5 mm . Everything has it difficulties as it is hard to locate compression fittings in 5 mm as the norm is 4 then 6mm. Thankfully you can buy a pt100 probe with compression fitting on eBay in 5mm.
use a cheap PID eg the REX C100:
rex c100 search @ eBay
Then get 4mm probes:
2x PT1000 Probe 4mm*30mm RTD 2m-wire Platinum Resistance sensor 2 Meter Two Wires thermocouple tubes Temperature Detector @ AliExpress
2X PT100 Temperature Sensor RTD SUS304 Probe 4mm*50mm 0.5m Metal Shielded Wire Platinum Resistance 3 Wire Temp Probe @ AliExpress
Slightly off topic:
@GD50 if you are after a basic unit that displays more than 1 input (but no alarm), have a look at what Autonics make. Here is the manual (PDF).
One variant on fleabay:
New Multi Channel/Point Temperature Measurement Indicator AUTONICS T4WM-N3NKCC @ eBay
Thanks @crozdog . I knew you must be able to get 4mm rtd probes i guess i could not find them because i was looking for 100mm long ss probes immersible where the 5mm is std. Those and particularly the second three wire probe would do good in the thermowell.
I will have a go at that ebay display as it will clean up my setup nicely as at the moment i have three pid controllers and two 12 v panel meters all for the display only so it is a dogs breakfast .
The only thing i can foresee is that on the pid controllers you can input an offset to make all probes read the same during a calibration but cannot imagine you can do that on that multi display.
Yes thanks @crozdog ! I guessed I wasn't the only one who wanted an alarm or relay to be coupled with a thermowell sized sensor...
no probs squeaky.
@GD50 the autonics T4WM-N3NP0C takes RTD / Pt100 probes. Don't know if you can adjust the offset on each input. Might need to measure each & tape up a sign of the offset for each???