Temperature Probes


STEP 2: Attach the female XLR connector

There are only two places during our entire brewery build process where soldering with a soldering iron is required. This is one of them. If you've never soldered before I suggest you watch this YouTube video on the correct way to solder. It's quite simple.

A fancy soldering iron is not really needed here, but if you're considering a good quality unit that'll last you a lifetime and is easier to use, the Hakko FX-888D soldering station is an excellent choice. Over the years we've went through countless $10-$20 pencil soldering irons before buying one that would last and actually maintained heat properly. Use rosin core solder (63% tin, 37% lead). We recommend Kester 63/37 available in 1 lb spools and small 1 oz packs (more than enough for our project here).

We're going to solder the three temperature probe wires to the 3 pins on the female XLR connector.

Slide the XLR connector body on to the cable with sleeving. Then solder the two red wires to pins 1 and 3 and the white wire to pin 2. Crimp down the strain relief making sure it crimps and holds both sets of expandable sleeving and the stainless steel wire rope.

The small nylon cable tie helps hold the stainless steel wire rope in place. Make sure the rope is slightly shorter (tighter) than the signal carrying red/white wires before crimping everything down. This will ensure that the stronger rope (and not the fragile signal wires) will take the strain if you pull on the cable by accident. 

Remove the screw from the female XLR connector to reveal 3 pins plus a shield: 

Soldering and securing the wires and stainless steel wire rope:

Slide the XLR connector parts back together and re-attach the screw. You're done!


Repeat the process for all three temperature probes. Your probes are now nicely protected and detachable.

The locking XLR plugs connect to the receptacles labelled BOIL PROBE, MASH PROBE, and HOT LIQUOR PROBE on our control panel:

Continue on to Building Your Brewery - Hot Liquor Tank.