What is the classification of limit switches and its principle?
Limit switch In fact, the main role is to protect, especially the small appliances used in our lives have its application, the most common is the washing machine, we know that when opening the washing machine lid, the operation of the machine will automatically stop, so not only to protect the safety of the washing machine, but also to protect the safety of the user’s life, and this is the use of the limit switch to achieve.
Mechanical limit switch In fact, it does not need power operation to handle high current loads, because it is an electromechanical device that detects the position by direct contact with the target, using dry shock, no polarity or voltage sensitivity, such a switch needs to have multiple moving parts, and its repeatability is relatively poor.
Valve limit switch In fact, there are four main types, that is, mechanical limit switches, spring limit switches, inductive proximity sensors and limit switches.
Spring limit switch It is by attracting the target magnetic field to detect the target position, it has a metal pin inside, such a reed element is magnetic sensitive, the magnetic target will be activated when it is near, it has all the advantages of mechanical switch, but the reed element is very fragile, the glass tube may be damaged, so the application of high vibration may cause it to send false signals.
Limit switch The use of hybrid technology through the electromagnetic cooker to determine the target location, it is very durable, and in a variety of harsh environment applications are also very reliable, it does not require physical contact or external power supply, a combination of all the advantages of the above types of switches, has a very wide range of work.
