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Temperature Sensors - Thermostats - Mechanical

Thermostats are mainly used in industrial and commercial buildings for temperature control purposes. They are devices that detect changes in temperature and can be used to regulate and maintain a certain temperature. When a temperature increase or decrease is detected, the thermostat will activate a response in order to control the temperature. The response typically involves controlling a heating or cooling device such as a fan, heater, or air conditioning system. In residential and commercial buildings, thermostats are used to regulate and maintain the temperature of the living spaces, making them more comfortable for occupants.

A common type of temperature sensor used in thermostats is a thermistor. A thermistor is a type of resistor that changes its resistance when it is exposed to a change in temperature. They are usually made of ceramic material that is impregnated with metal oxide particles or deposited metal films. As the temperature changes, the thermistor’s resistance also changes, allowing it to detect the change in temperature. Thermistors are commonly used in thermostats due to their accuracy, reliability, and low price.

The working principle of a mechanical thermostat is simple. It consists of a metal bi-metallic strip or coil which reacts to a change in temperature. When heated, the two segments of the bi-metallic strip expand at different rates, warping the strip and bending it. This in turn moves a lever connected to the strip, and triggers the thermostat switch to turn off or on whenever a predetermined temperature is exceeded. It is important to note that mechanical thermostats are not as reliable as thermistors, due to the fact that they are influenced by external factors such as air currents.

Thermostats have a wide range of applications. In industrial and commercial settings, they are used to control the temperature of manufacturing and processing facilities, warehouses, and other buildings. In residential settings, they are used to regulate temperature in order to maintain the desired level of comfort. Additionally, they are also used in medical settings to monitor the temperature of incubators and other sensitive equipment.

Overall, thermostats are essential devices used for temperature control in a variety of settings. They are generally very reliable and easy to use, making them a popular choice for temperature regulation. With the right type of thermostat, it is possible to maintain a comfortable temperature in any environment.

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