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4 Types of Thermostats That You Should Know

by Lloyd Ortiz

Temperature controllers, or most commonly known as thermostats, are devices that are used for sensing and regulating the humidity of the air, the temperature of different types of liquids and other similar processes. Unlike thermometers that mainly provide a reading or a value of the temperature in a room, of a liquid or object, temperature controllers are designed to manipulate the temperature according to the person’s desired level. 

If you don’t know, temperature controllers are widely used in a number of products and markets. Some of them are even well known consumer goods. This article will discuss four different types of temperature controllers and its efficiency in some manufacturing processes. 

Mercurial Temperature Controllers 

Amongst the earliest types of temperature controllers that have been used is the mercurial temperature controllers. It is made up of a therma coil and a mercury toggle which is operated on the device by a manual knob or a handle. If the knob is turned and the temperature level elevates, this process allows the mercury switch to turn off and transmits a signal to the heating system to turn on. When the air starts to heat, the change of temperature causes the thermal coil to decompress, the mercury switch then activates and the heating system is turned off. 

Bi-metal Temperature Controllers 

Another reliable and most commonly used thermostat is the bi-metal thermostat. A bi-metallic strip is made up of two metals which are brass and iron, whose thermal expansion coefficients are distinctive. The shuts off when the temperature starts to rise. When the bi-metal strip bends and opens the electrical connection, the heating system turns off as the room temperature increases.

Pneumatics Temperature Controllers 

Pneumatic temperature controllers can manipulate the air output pressure as a reaction to the level of humidity of the air. There are two different pneumatic temperature controllers that you should know which are direct acting (DA) and reverse acting (RA). Direct-acting devices create a higher pressure output as the room temperature increases whereas reverse-acting acts as a mirror to the prior action by creating a lower pressure output as the room temperature decreases.

Wireless Temperature Controllers

Different from mercurial and bi-metal temperature controllers in which they both are operated manually, the majority of the modern temperature controllers are electronic temperature controllers that include programmable digital temperature controllers. One of the biggest benefits to this type of temperature controller is that they are able to create heating and cooling profiles that are appropriate to the needs of the owner of that specific building. These types of temperature controllers include an array of options for their settings, relevant to the time of the day or week. This helps tremendously when for a person’s sleeping pattern as they don’t have to wake up at night just to meddle with the temperature of the room. With new developments made on the temperature controllers, which then are called smart temperature controllers, consumers now are able to connect them to their cell phones which makes the job of controlling the temperature much easier.