Mechanical Temperature Switch Working Principle

Old yazaki water temperature gauge operated via a capillary tube rather than an electrical circuit.

Mechanical temperature switch working principle.

The sensing bulb is screwed into one of the engines water passages and as the engine heats up the fluid in the bulb and the tube expands and causes the needle to move. In general the functioning of a temperature switch and a pressure switch is almost same since both. Temperature switch working principle temperature is a measure of the average heat or thermal energy of the particles in a substance. This switch is made up of one normally close contact nc and one normally open contact no.

Depending on the requirements mechanical or electronic switches can be used. The micro switch in the sectional view is a single pole double throw s p d t switch. Thermostats work on the principle of thermal expansion. The micro switch is used to make or break an electrical circuit when the pressure switch operates.

Temperature switches are used in a variety of industrial and technical processes. The temperature is then sent to the on board control system. This principle governs the switching off or on of the electric circuit. If a preset temperature is reached then the temperature switch opens or closes a corresponding switch contact.

The working of a temperature switch is based upon the temperature variations taking place in an enclosed space or in an open area adjoining the temperature detecting component. The most common types of mechanical thermostats typically use either bimetallic strips or bellows filled with gas. In this case the temperature switch operates to switch on or off at discrete process temperatures. Certain chemical reactions biological processes and even electronic circuits perform best within limited temperature ranges.

This might be expected since most physical electronic chemical mechanical and biological systems are affected by temperature. After cooling down to the reset switching point hysteresis usually 30k the switch. From there your vehicle s computer will use this temperature information to either continue operating or adjust certain engine functions always working to keep the engine temperature at an ideal level. While digital thermostats use the same principle but everything is controlled.

Temperature switch operating principle of temperature switch. The sensing of the temperature results from a bimetal disc which is inside the stem. How temperature switches work custom search a temperature switch works just like a typical electrical switch for on off application. As switching function there are available nc normally closed and no normally open.

The mechanical water gauge is operated on the bourdon tube principle. Temperature is the most often measured environmental quantity. Since it is an average measurement it does not depend on the number of particles in an object or the object s size.