Looking for 5 People to Experiment with Thermocouple/RTD Connectors

To some degree it matters what the distance from the actual RTD to the board that is processing the signal is.  If this distance is relatively far (ie across the room or up in a ceiling, etc), then i would use a terminal block or a connector, so that a) its easier to run the wire and then connect, and b)you have more control regarding that the connection is using equivalent materials, and there is no thermal differences at that point (this is assuming the wire to the RTD is sheathed in appropriate material to ensure zero thermal difference as well.

If the RTD and circuits are next to each other, then soldering is the best way, again, assuming that the solder is being put down in such a way so that mass of the solder for each connection is relatively the same, and the electrical connection is solid. 

Really clever design for SMT RTD. I am interested in this experiment. Better read datasheet first before first move.

This is the sort of thing where I would get someone else to do it. Not very helpful I know but I found it worked quite well.

Dubbie

For thermocouples, crimps etc introduce errors. Quality matching thermcouple connectors are a must. We use a lot of Type T and with careful selection and connection get better than 0.2c accuracy 0-140 c.

RTDs.. For PT100 stray resistance from crimps is the enemy. As are poor quality tin plate push connectors. Screwed connectors, or low resistance plated connectors.

For PT500/1000 its way less critical.  Almost any semi decent connector works ok.

I would be interested in testing the connection mechanism on the Raspberry Pi project that uses temperature sensors..

My objective would be to try and mount the connectors on perf boards. Looking at the pictorial from the Element14 posting the connectors assembly is in two parts. The binding posts solder to a printed circuit board and a connector assembly mates to the binding posts. My testing is to determine if the connectors can work on a PCB that is not manufactured. PCB that are the bread and butter of the hobbyist.

I would like to try and assemble three boards. That would require 3 binding posts X 2 sets per board X three boards and 2 connectors per 3 boards.

18 binding posts and 6 connectors is what I get for totals.

I am designing a PCB with several sensor interfaces to mate with a MKR Zero.

It will include 3 K type thermocouples with the smaller connectors that should fit these PCB connectors.

I am planning to use 3 Maxim interface chipMaxim interface chips to get accurate temperature readings/.

The system will have an LCD display so it can display sensor data.

rscasny Where can I find a datasheet showing PCB footprints etc for these TC connectors? I don't see a part number above.

Blogging about the project would have to wait until the PCBs show up.

Hi Douglas,

Let me get it for you.

Randall

Let me get the datasheet for everyone.

Randall

Here's the datasheet I was given by the supplier:

https://www.farnell.com/datasheets/2913879.pdf?_ga=2.178074087.357810872.1592229097-982436643.1585328086&_gac=1.24561515…

If you need something more, tell me. I'll call the supplier and get it for you.

Thanks.

Randall

Good point mate!