What is this?

[hkgar]

https://photos.app.goo.gl/nImfIPb1LkX8Kqks1

OK, I know that it is a two stage regulator, but what is the plug for? Yes, it is probably electronic.

I don't have any idea how I came to own it. I was clearing out some sehlves of old "junk" and cam across this. Maybe it came wit a Calcium reactor I bought?

Any idea of the value and if there is a market here or on ebay?

[Vinny Kreyling]

The black rectangle is a solenoid, pull the plug & it closes shutting off the gas supply.
& yes it's for a Calcium Reactor. For sale --not too much, looks like a Milwaukee Regulator.

[tkeracer619]

Free to a good home. Personally I wouldn't use it, those solenoids can be problematic when in new condition.

I'd toss it personally and save someone the headache.

[hkgar]

Pretty much what I thought. In to the trash it shall go. Or, maybe Ebay ;)