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Understand What The Thermostat Is And How It Works

Despite being a familiar word, understanding a thermostat is not common, especially regarding the types of equipment and what each one is used for. The general sense is that this component is linked with temperature, usually associated with heaters and refrigerators.

The thermostat which can be seen in sites like for instance is usually associated with heaters, refrigerators, and car engines. But most people can’t tell you what this item does. It controls the heat of various machinery and devices, such as food containers, aquariums, brooders, greenhouses, ovens, laboratory equipment, air conditioning, among others.

What Is A Thermostat?

The thermostat is a component used in process automation, with the main function of detecting temperature variations and correcting these amplitudes, keeping the atmosphere within a previously programmed acceptable range.

Thus, thermostats are present in various equipment, devices, and systems to detect and correct temperature variations automatically and effectively. Above all, they are made up of two main components, which are sensors and regulators.

The sensors aim to indicate the thermal variation suffered by the system while the regulators control this oscillation and correct temperature deviations, keeping the environment within a desired range.

How Do Thermostats Work?

Thermostats are designed for automatic control of the temperature generated during some processes. The instrument detects variations in heat and makes corrections to adjust it to a level considered ideal for that equipment. It is part of heating and cooling systems, so they are essential in our daily lives. See some details!


As shown, the thermostat’s function is to control the temperature so that it meets certain pre-set limits. The element responsible for this maintenance is the regulator, which coordinates electric irons, refrigerators, and much other equipment.

Regulatory thermostats adjust the hot or cold temperature and activate a circuit when necessary, as it is a kind of switch that turns the device on and off. On the other hand, the sensor thermostat monitors the temperature degree in real-time and sends this data to a regulator, which, in turn, issues the command to turn off or turn on the equipment.

Also, this component combines temperature variations with pressure changes about the sensing element, activating the correcting mechanisms. The constitution of a metal container filled with liquid or gas and connected by a thin tube to a bulb is an example of this device.

Thus, the temperature variations endured by the fluid in the main container are communicated to the bulb from the connecting tube. As the volume is fixed, the change in the control bands causes a change in pressure, transmitting to the central element. When the two functions are applied together, they allow equipment to function accurately, efficiently, and safely. With these components in action, someone doesn’t need to read the temperature and adjust, as the variation will have a predetermined limit, which will never be exceeded due to the function performed by the thermostat. Thus, this variation causes a change in the volume of the container, increasing or decreasing the temperature to compensate for these different amplitudes.

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