I've used a 3.5mm jack for one.

A bit more secure than the power leads & no change of accidentally connecting a power supply….

P.S. The flaming thing beeps if the probe isn't plugged in which is a PITA as I would like to use the box without it most of the time, I've just realised I could wire a fixed resistor across the jack socket that's switched out when I plug in the probe.

Edited By Neil Wyatt on 06/06/2019 10:58:48

Why not a GX16 type plug and socket. Often used for microphones and ham and CB transceivers.

Hi,

For any sensors or transducers I always use XLR connectors (Microphone Type) as they are so versatile with up to 8 pins and with the correct screened cable are very resistant to RF generated by motors etc. Fully sealed types are available but they are very expensive compared to the standard type which are reasonably cheap.

You have to solder in the cables and that can be fiddly but take care and all will work well. I have a machine that has been in daily use for about seven years and I have had no problems with these connectors.