Mercury Thermostat How Does Work - how does the mercury in a thermostat work as the room cools the thermometer coil winds up until the mercury switch tips back to the left thermostats have another cool device called a heat anticipator p div class b factrow b twofr div class b vlist2col ul li div class b sritem b srtxtstarcolor 5 5 span class csrc sc rc1 role img aria label star rating 5 out of 5 data tag item customratingitem span class sw st span span class sw st span span class sw st span span class sw st span span class sw st span span div class b sritemp 1 div div li ul ul ul div div div li the thermostat has a switch to select operation as either a heating or cooling thermostat this switch must be moved manually at the start of the heating or cooling season to work accurately a mercury thermostat must be mounted vertically and level the mounting base has marks to align the thermostat on a level line drawn on the mounting.

surface when you move the lever on the thermostat to turn up the heat this rotates the thermometer coil and mercury switch tipping them to the left as soon as the switch tips to the left current flows through the mercury in the mercury switch generally speaking thermostats work by using a mercury switch that is in contact with a thermometer wire to trigger a temperature adjustment lever in response to the expansion or contraction of the wires as they are heated or cooled the mercury contact bimetallic thermostat is an older type of analog non digital thermostat and once was the most mon type found in homes its simplicity makes it a good ex le for describing how an analog thermostat works p div class b factrow b twofr div class b vlist2col ul li div author bob formisano div li ul ul ul div div div li span class news dt 19 07 2019 span nbsp 0183 32 most thermostats work on the same.

simple mechanism in the thermostat a mercury switch is attached to a series of wires which myth mercury should be removed from a thermostat when the thermostat is replaced fact replace the cover on the thermostat and return the intact thermostat to your wholesaler for mercury recycling if your favorite wholesaler does not participate it should be easy to find one that does let s start with the mercury switch a glass vial with a small amount of actual mercury inside mercury is a liquid metal it conducts electricity and flows like water inside the glass vial are three wires so how does a thermostat work most things get bigger when they heat up and smaller when they cool down water is a notable exception it expands when it heats up and when it freezes too mechanical thermostats use this idea which is called thermal expansion to switch an electric circuit on and and off



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