Temperature switch

[Tyler d4c]

Does any of you fine fellows know where to find a 1/8-28 water temp switch at. It is used for a murphy shut down system. I'd imagine it should switch at 210 or so degrees. Thanks.

 

[1693TA]

Kinda like this:

https://www.amazon.com/AUTOHAUX-Uni...ix=1/8+-+28+temperature+switch,aps,80&sr=8-31

 

[Tyler d4c]

That one's npt I need British maybe I should just retap it

 

[1693TA]

Enough room to incorporate an adapter?

https://www.amazon.com/Dewhel-Femal...8+-+28+bspt+temperature+switch,aps,88&sr=8-26

 

[Tyler d4c]

That maybe the ticket if it fits though I'll order both and try it.

 

[willie59]

They make those adapters in steel as well. You could likely have room to drill the hole in the adapter a bit larger to accommodate the probe. Of course that would make the thread wall a bit thinner, that's where a steel fitting would be better in that case, but you're looking at low pressure in either case as most cooling systems are only 7 to what, 15 psi max. Both brass or steel could handle that, but steel would be stronger in tightening the pipe threads than brass with the thinner wall after being drilled.

 

[1693TA]

My only concern would be probe insertion depth. I don't know if you would get an accurate rating if at least 2/3 of the probe is not immersed in the coolant. It would depend on the standoff distance the adapter presents. It could work fine also.

 

[joe--h]

Just bugger it in, it'll work.
Joe H

 

[Tyler d4c]

The one from Amazon doesn't work it still has enough power flowing while cold to trigger the murphy system when cold I think I may have to make it operate a relay to trigger the light