Looking for any suggestion of mfg or source for temp sensors to heat exchanger. Lets see I guess I need a 180, and a 220 or 230 and a 260 (for shut off). Are these things readily interchangeable. I am guessing they are, but I don't know where to start. BTW I have a 22 HP kohler engine piped to the HX through an actuated diverter valve. I really want to find best price. Also I saw some somewhere that had terminals on them so I don't need to use butt connectors. I am too lazy to solder, but use environmental splices. Please post what you think.