300400120035

Series:	3004
Part Status:	Obsolete
Circuit:	--
Switching Temperature:	--
Reset Temperature:	--
Current Rating - AC:	1.5A (250V), 8A (120V)
Current Rating - DC:	--
Tolerance:	--
Switching Cycles:	6K
Termination Style:	Solder Lug
Mounting Type:	Chassis Mount
Package / Case:	Module

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IntroductionTemperature and humidity control is one of the most important topics in the field of automation. This article will discuss the 300400120035 application fields and the working principle of thermostats. Temperature sensors play a major role in these systems, and this article will discuss how each type of sensor works in combination with the control system to control temperature and humidity.ThermostatsThe most common type of temperature sensor used in control and regulation systems is the thermostat. A thermostat is a device which senses temperature and automatically control the flow of water or heat. The use of thermostats was patented in 1883, and since then many types of thermostats have been developed, each with its own characteristics.Thermostats generally consist of two main parts. The first part is the sensing element, which is typically a wire or a thermistor. The sensing element is held in contact with the medium being measured (such as air, water, or metal) and is used to sense the temperature. The second part is the switching device, which is used to control the flow of heat or water when the temperature is higher or lower than the desired limit.MechanicalMechanical thermostats are the oldest type of thermostats. In a mechanical thermostat, a membrane is used as the sensing element, which is connected to an activated mechanism. The membrane is heated up by the environment, which causes the membrane to expand and contract. This creates a tension in the spring that powers the switching device. When the temperature reaches the set points, the tension causes the switching device to open or close, thus controlling the flow of heat or water.Advantages of Mechanical ThermostatsMechanical thermostats are simple, reliable, and relatively inexpensive. They require little maintenance, and are not sensitive to power outages. Furthermore, the settings of the thermostat can be adjusted manually, so the user can easily set the desired temperature.Disadvantages of Mechanical ThermostatsMechanical thermostats are not accurate or repeatable. Furthermore, they are easily affected by vibrations or other temperature changes, and their switching devices may fail over time.ConclusionThis article has discussed the 300400120035 application fields and the working principle of thermostats. Temperature sensors are used in combination with the control system to control the temperature and humidity in the environment. The most common type of temperature sensor used in control and regulation systems is the thermostat, which consists of a sensing element and a switching device. Mechanical thermostats have been around for a long time, and are simple, reliable, and inexpensive. However, they can be inaccurate or unreliable, and their devices may fail over time.

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