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A thermocouple is a device which generates an electrical charge when

heated. It is often used on a boiler to indicate that the pilot light

is on and hot, so it should be safe to allow gas to pass to the main

burner for heating water, your house, etc. Should the pilot light go

out, the thermocouple will sort of "tell" the boiler to shut off the

gas, as it isn't safe to fire up.

A thermostat is used as a switch, which goes on and off at a certain

temperature. For example, in a boiler it will tell the boiler that the

water in the circuit is plenty hot enough and that it doesn't need to

be heated any more, in your house it will tell your central heating

that the room is warm enough and doesn't need heating any more and in

your car it would say that your engine is too hot and that the radiator

valve should open, and perhaps the cooling fan should turn on.

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13y ago

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Related Questions

When does a thermocouple produce electricity?

When there is a heat differential between its ends


What kitchen utensil is used for measuring temperature?

you use a thermocouple instrument


What does a thermocouple do and how does it function in measuring temperature?

A thermocouple is a device that measures temperature by detecting changes in voltage when there is a difference in temperature between two different metals. When one end of the thermocouple is heated or cooled, it creates a voltage that is proportional to the temperature difference. This voltage is then converted into a temperature reading by a thermometer or temperature controller.


What is the difference between thermocouple and RTD?

A thermocouple measures temperature difference between two points, producing a tiny voltage corresponding to the difference in temperature. To measure temperature with a thermocouple, you need to know the temperature of one junction and calculate the difference from the table or equation for the type of t/c used. An RTD changes resistance in response to temperature--to measure temperature with an RTD you measure its resistance (usually by putting a known voltage across it and measuring the current).


Does thermocouple converts chemical energy into electrical energy?

No, a thermocouple does not convert chemical energy into electrical energy. It generates electricity by using the Seebeck effect, which is based on the temperature difference between two different metals. The thermocouple produces voltage directly from heat.


What does thermocouple produce what kind of energy?

A thermocouple produces electrical energy by utilizing the Seebeck effect, which generates a voltage when there is a temperature difference between the two junctions of dissimilar metals in the thermocouple. This electrical energy can be used to measure temperature or power electronic devices.


What do you use a THermocouple for?

measuring temperature difference


Why would you use a thermocouple for controlling an electric frying pan?

Since a thermocouple responds to temperature, it can be used as a thermostat, to set a specific temperature for your electric frying pan.


How do you check hot water cylinder thermostat?

You light the pilot. if it will not stay lit,the thermocouple is bad.


What causes Grill pilot light on wolf salamamder grill to keep going out thermocouple ok valve new?

If a Salamander Grill keeps going out and the thermocouple is okay and the valve is new then a faulty thermostat could be the cause. Replacing the thermostat or re-calibrating it generally solves the issue.


What is the function of thermocouple?

The thermocouple does not actually measure temperature, but the temperature difference between two points. If the temperature at one point is known (reference junction) then the temperature of the other point (sensing junction) can be calculated.


What is the difference between a thermometer and a thermocouple?

A thermometer measures temperature using a temperature-dependent physical property, such as liquid expansion or electrical resistance. A thermocouple, on the other hand, generates a voltage proportional to the temperature difference between its two junctions, based on the Seebeck effect. Thermocouples are typically used in more extreme temperature environments compared to thermometers.