3100 00031537

Series:	3100
Part Status:	Active
Circuit:	--
Switching Temperature:	--
Reset Temperature:	--
Current Rating - AC:	3A (240V), 7A (30V)
Current Rating - DC:	7A (30V)
Tolerance:	--
Switching Cycles:	5K
Termination Style:	Solder Lug
Mounting Type:	Chassis Mount
Package / Case:	Cylinder with Mounting Flange

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Temperature Sensors - Thermostats - Mechanical

Temperature sensors are an essential part of today’s applications, in a variety of sectors and industries. From medical devices and industrial process control to consumer products, temperature sensors enable temperature measurement and control. One of the types of temperature sensor technology is mechanical thermostats – offering individual control of heating, cooling or air-conditioning systems.

310000031537 Application Field and Working Principle

Mechanical thermostats are often found in domestic and commercial heating, cooling and air-conditioning systems. They control the temperature of a room or area by switching the heating or the cooling system on and off. The purpose of mechanical thermostats is to sense a change in temperature above or below pre-set threshold levels. This triggers an electronic switch to activate the heating or cooling system, as appropriate.The main components of a mechanical thermostat are a bimetallic strip and an electrical contact. The bimetallic strip is constructed from two metal strips of different materials, such as steel and copper, which are bonded together. The different metals have different expansion and contraction rates with temperature, so when the temperature around the thermostat changes, the bending of the strip can cause its shape to change. This, in turn, causes the electrical contact to be opened or closed. The magnitude of the temperature change that produces a change in the electrical contact is adjustable, depending on the pre-set threshold.The main advantages of mechanical thermostats are their low cost and simplicity. They are relatively easy to install and maintain, and they are not affected by electromagnetic radiation, unlike some electronic thermostats. Mechanical thermostats are also very reliable, with no moving parts that can break down. The main disadvantage of mechanical thermostat is that their performance is affected by ambient pressure and humidity, causing it to be less accurate.

Conclusion

Mechanical thermostats are a simple and reliable temperature sensing device, suitable for use in many applications. With no moving parts, they are efficient and easy to install, maintain and adjust – all leading to lower costs and reliable temperature control. Mechanical thermostats are also relatively insensitive to electromagnetic interference, and have a wide range of operating temperatures. However, their performance is affected by changes in ambient pressure and humidity, leading to decreased accuracy and consistency.

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