I was contracted to build a breakout box for thermocouples used in monitoring the temperature of blood storage.
See images below.
The thermocouple probes.
I had to terminate them with Switchcraft® brand 4 pin mini XLR male connectors
Size reference for the connector body.
Soldering the thermocouple cable to the male connector.
Thermocouple wire is typically a bi-metal, this one was particularly hard to solder. I used rosin based flux and set my iron to 800° F.
Lots more to do. In all I had to terminate 20 thermocouples, make 20 16' male to female extensions, install and wire 20 female panel mount connectors and terminate the back ends to a data card.
The breakout box complete with cable gland.