Temperature Switches

Temperature switches are used in instrumentation to generate a signal when a particular temperature has been reached.  The switch closes or opens giving a signal.  This signal can be used to stop an equipment in case of high temperature protection or start a compressor in a refrigeration system.Temperature switch with thermowell

Temperature switches operate in a variety of ways from simple bimetallic strips to thermistor driven electronic switches.  In some switches, wax pellets which expand at high temperature can be used. 

The output of a temperature switch can be configured to be either normally closed (NC) or normally open (NO).

Temperature Switches need to be periodically calibrated in a Temperature bath to ensure set point accuracy.