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Brewing Topics => Equipment => Topic started by: Imperial Stout on November 17, 2018, 01:00:49 PM

Title: STC-1000 thermocouple wire
Post by: Imperial Stout on November 17, 2018, 01:00:49 PM
Looking for 15 feet of NTC thermocouple wire to extend STC-1000 sensor. Found several short lengths of NTC wire but want to avoid multiple soldering joints. Anyone know where to get long lengths? Anyone solder in several pieces successfully?
Title: Re: STC-1000 thermocouple wire
Post by: dtapke on November 17, 2018, 01:10:25 PM
Should be able to use any standard wire it's probably 20g wire. If you're running a long distance and have any concerns of inductive voltages I'd find some twisted Bus wire.

make sure you get good mechanical and electrical connections, I use splicing bands, electrical solder, and glue filled heat shrinks on any small wiring I do. Makes for a water tight mechanical and electrical connection. Could also do the old fashioned "Western Union" splice if you're feeling nostalgic.
Title: Re: STC-1000 thermocouple wire
Post by: GigaFemto on November 17, 2018, 03:18:11 PM
Thermocouple wire should not be soldered. The junction between different metals is what generates the voltage. You should twist or crimp wires of like material together or use special screw terminals designed for thermocouple wire all the way to the final spot where voltage is measured. See extension wire, connectors, terminal blocks, etc. from a company that sells lots of thermocouples and accessories like:

https://www.omega.com/
https://www.automationdirect.com/

and many others

--GF
Title: Re: STC-1000 thermocouple wire
Post by: brewfun on November 17, 2018, 05:34:37 PM
Looking for 15 feet of NTC thermocouple wire to extend STC-1000 sensor. Found several short lengths of NTC wire but want to avoid multiple soldering joints. Anyone know where to get long lengths? Anyone solder in several pieces successfully?

Gigafemento correctly explained the theory behind a thermocouple. The sensor has to be calibrated for the metals.

McMaster Carr is a place for finding a lot of hard to find parts.
Title: Re: STC-1000 thermocouple wire
Post by: Imperial Stout on November 18, 2018, 08:18:02 AM
Thank you. I found exactly what was needed at https://www.amazon.com/dp/B0725HVHKR