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7th Dec 2013, 15:30

#752 (permalink)

jimjim1

Join Date: Oct 2007

Location: Here

Posts: 963

Received 3 Likes on 2 Posts

temperature operated switch

It took a while but I finally found a reference to such a device.

Specialty Level Switches

Quote:

Thermal level switches sense ... the increase in thermal conductivity as a probe becomes submerged in the process liquid.