Low coolant alarm kit

Hi,

I've bought a low coolant alarm kit from Brown & Gammons.

It came with a stainless steel sleeve, but nothing in the instructions as to what to do with it.

Any suggestions?

I dunno, I don't recall having that with mine when I installed mine ages ago, nor can I imagine what it's for...........Unless It's an "improvement" to the kit, I assume It's a bonus random stray item, that's found it's way into the package.
I'd get in touch with B&G and ask them.

Is it possibly a rectum liner in case it goes off, did it come with a sachet of grease