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The Epic Interactive Encyclopedia 1997
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1992-09-02
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520b
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13 lines
Temperature-controlling device that makes use
of feedback. It employs a temperature sensor
(often a bimetallic strip) to operate a
switch or valve to control electricity or
fuel supply. Thermostats are used in central
heating, ovens, and car engines. At the
required pre-set temperature (for example of
a room or gas oven), the movement of the
sensor switches off the supply of electricity
to the room heater or gas to the oven. As the
room or oven cools down, the sensor turns
back on the supply of electricity or gas.