Fast, precise, electromechanical thermostats
-- Control Engineering, 10/1/2001
Ashland, Mass. - Thermoswitch temperature
controllers are available in a full line of electro-mechanical thermostats that
require no external power and are said to be economical, robust alternatives to
electronic temperature controllers in many applications. The temperature
controllers are tubular devices featuring an outer shell made of a
high-expanding metal and internal struts made of low expanding metal with a pair
of electrical contacts between them. When the temperature of the media being
measured changes, a corresponding change in the spacing of the contacts provides
on/off control with a small differential, resulting in ±1 °F precision,
depending on the application. Easy to install using their own hex coupling, the
devices are user-settable, UL/CSA listed, and exhibit >100,000 cycles
operation at 10 A, 120 V ac.
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