Is that a wire or a cable (more than one conductor)?

Are the two metal tabs to keep the rubber in place?

Keith Cress
kcress - http://www.flaminsystems.com

Single conductor
The rubber is glued in place
I thought the tabs might be for continuity or a ground connection.
I suppose it could be a pressure sensor using a strain gauge. It’s not a pressure diaphragm. No pressure tap and the rubber is as hard as a hockey puck. I thought a flow sensor or meter more likely

I don't think it's a pressure sensor as it would have the same pressure surrounding it on all sides. I'm guessing possibly a fly-by metal detector. One wire would be fine for a capacitive signal.

Another possibility; Does your facility process conductive fluids?

Keith Cress
kcress - http://www.flaminsystems.com

Possibly a grounding electrode for slurry service HDPE pipe.

That's my best guess

Are the two tabs electrically connected and on the inside of the pipe?

We are a wastewater facility with a waste incinerator and a liquid O2 plant. Whatever it was used for is no longer in use. As for pressure being on all sides that wouldn’t matter if you are just sensing pressure not differential pressure. I will check on the continuity tomorrow. We have no HPDE pipe but we do pump an ash slurry to our retention ponds. No instrumentation on it though. I was thinking someone might have seen it before. It will ultimately end up in the recycle.

It is a grounding ring for a magnetic flow meter. https://www.flowcontrolnetwork.com/magmeter-ground...

Ok. We have a lot of nagmeters and all their ground rings look more like orifice plates than anything like this. Plus there are usually 2 of them and there is only one of these. But I defer to your opinion. So far it seems the most reasonable.

Seems like this is related somewhat to mag meters. Some pictures of mag-meter spools show exactly the same rubber orifice. No chance the expected metal "orifice plate" isn't sandwiched in the center of the rubber?

Keith Cress
kcress - http://www.flaminsystems.com

No way to tell. But if the 2 metal tabs are connected they could serve to carry the ground around the isolated magmeter. Which leaves the function of the yellow wire. I may have to dissect it before canning it.

Last round. The metal tabs are not electrically connected to each other, to the metal flange or to the single conductor.

Those metal tabs look like grounding straps. They create electrical continuity from one flange face to the other flange face around the insulated rubber liner. I think the wire may just sense the ground reference potential of the fluid inside the ring. Do you see an electrode of some sort inside the ring?

Just rubber in the ring. If the tabs are isolated from everything they won’t have any conductivity through or week around anything.

The tabs contact the flanges that will clamp the ring in place.

Yes they do but that is all they do. They don’t contact me each other therefore no through continuity.