I think it's unlikely that you'll find a parts distributor that will sell
just one part at a reasonable price, even if you were able to locate a
distrubutor that stocks the item.

It's not likely that there are very many connectors which are that small,
with pins receptacles/sockets in that orientation, sort-of like a ultra-mini
4-pin DIN or XLR.
Since it's European, a maker such as Lemo might be possible, but I don't
recall seeing ones like that in their product line.
I'm fairly certain that it's also not a Hirose (HRS) connector.

High quality small connectors are generally quite expensive, but if you're
very lucky, someone my recognize this connector that has a few of them, and
would be happy to send you one.

As Nigel suggested, you might try making a mating connector, and that may be
the best approach if you like making small parts.
Some contacts from a common, inexpensive connector like the D-sub 9 thru 25
pin data connectors may fit those pins.
Drilling a piece of nylon or other insulating material would provide a
connector body to orient the pins.

Another alternative would be to just choose a more commonly available
connector and replace the instrument connector.
The least elegant solution would be to remove the instrument connector and
solder the probe leads to the ciruit board (providing a suitable strain
relief for the probe cable), but that will limit the probe's use to only
this instrument.

--
Cheers,
WB
..............


"civ" wrote in message
...
Hello:

New here ... =-)

I would be very obliged if you'd allow me to tap into the collective
experience of this important group.

I need to connect a 4 wire PT100 immersion probe to a (very good
quality but now out of production) IR thermometer which has a male
socket like the one in the photo at the following link:

http://repairfaq.cis.upenn.edu/Misc/plug.jpg
(link hosting courtesy of SG at repairfaq)

I have not been able to ID it.

The inner diametre is ~ 5.5 mm.
It has what seem to be gold plated contacts and does not have an
orientation key, just push-on / pull-off with no threads or twist
mechanisms.

Being the socket for a PT100 probe, there's no special voltage
requirements, just negligible resistance.

Seems well made and the instrument it is on is of very good quality
and specs. eg: only Fluke ordinance and other similar quality + high
price IR thermometers/equipment have the posibility of variable
emissivity (E=epsilon) settings.

I doubt it is of a proprietary nature but you never know with some
OEMs.
They have not been very helpful.

The people at Omega haven't seen it before.
The tech guys at DigiKey and Mouser have been very diligent but don't
have it or know about it.

The instrument is European made, my guess is that the plug could also
be.

I'll be very grateful for any input.

Thanks in advance,
Best regards

CIV