A limit switch is an electromagnetic device that features an actuator mechanically connected to the set of contacts. They are used to automatically detect or sense the presence of an object or to monitor and indicate whether the movement limits of the object has been exceeded.
The original use of limit switch is to define the limit or endpoint over which an object could travel before being stopped. Most limit switches operate mechanically and contain heavy-duty contacts which can switch higher currents than alternative proximity sensors. There are generally four types of limit switches – whisker, roller, lever, and plunger.
They can be installed into machinery as control instruments for standard operations or as emergency devices to prevent machine issues.
Here are some of the advantages of using limit switches –
Here are some of the limitations or disadvantages of limit switches –
=> Limit switches are dependent on mechanical action, they are used in equipment that operates at low speed
=> As limit switches are contact sensors, there has to be physical contact with the target for them to operate
=> Limit switches are subject to mechanical wear or fatigue over time and will demand replacement
Micro Limit Switch
Micro Limit Switch or Micro Switch is another type of limit switch that is commonly found on control circuits. These switches are smaller than their standard counterparts, allowing them to be installed in narrow spaces that would normally be inaccessible to other switches. Microswitches usually have an actuating plunger that has to travel a small distance to trigger the contact sequence.
This article presented a brief overview of limit switches. If you are planning to purchase limit switches, some of the top manufacturers are Jigo India, BCH India and Vaishno CFG. The best quality limit switches from the leading limit switch manufacturers in India deliver impeccable performance.