What is a travel switch?
A travel switch is an electromechanical switch that automatically opens or closes a circuit when the position or movement of an object reaches a certain point. A travel switch usually has a removable trigger that changes the state of the switch when it is pushed or released by an object. There are many types of travel switches, such as microswitches, limit switches, and float switches.
What is a high temperature resistant travel switch?
A high-temperature resistant travel switch is a special type of travel switch that can function properly in high-temperature environments without damage or failure. The temperature range of high-temperature resistant travel switches is generally between 150°C and 450°C, and some can even reach 600°C or more. Applications for high temperature travel switches include heat treatment, furnaces, petrochemicals, aerospace, and more.
What is the working principle of high temperature resistant travel switches?
The working principle of high-temperature resistant travel switches is basically the same as that of ordinary travel switches, which are switches that use the position or movement of an object to control a circuit. The difference is that high temperature travel switches need to use some special materials and structures to ensure their stability and reliability at high temperatures. The following are some common working principles of high temperature resistant travel switches:
Thermal Expansion Travel Switches: This type of travel switch utilizes the different coefficients of thermal expansion of different materials at high temperatures to achieve switching action. For example, a metal rod and a ceramic rod are connected together. When the temperature rises, the length of the metal rod will increase more than that of the ceramic rod, which pushes a trigger that changes the state of the switch. The advantages of this type of travel switch are simple structure, fast response speed, the disadvantage is that the accuracy is lower, more affected by temperature fluctuations.
Magnetic control type travel switch: this kind of travel switch uses the change of magnetic field to realize the action of the switch. For example, a magnet and a magnetic switch are connected together, and when the magnet is near or far from the magnetic switch, it will change the state of the magnetic switch. The advantage of this kind of travel switch is no contact, no wear and tear, long life, the disadvantage is that it is affected by the magnetic field interference, and it is necessary to ensure the distance and angle between the magnet and the magnetic switch.
Photoelectric travel switch: this kind of travel switch uses the light blocking or reflection to realize the switch action. For example, a light source and a photosensitive switch are connected together, and when an object obscures or reflects the light source, it changes the state of the photosensitive switch. The advantages of this type of travel switch are no contact, no wear and tear, and fast response time. The disadvantage is that it is greatly affected by light conditions, and it is necessary to ensure alignment and cleanliness between the light source and the photosensitive switch.
High-temperature resistant travel switch is a kind of electromechanical switch that can work in high-temperature environments, it has many types, each with its own advantages and disadvantages, you need to choose the right type according to different application scenarios and requirements. The working principle of high temperature resistant travel switch is mainly to use the position or movement of the object to control the switch of the circuit, through some special materials and structures to ensure its stability and reliability under high temperature.
