Limit Switch – Everything You Need To Know About The Device

About Limit Switch - JiGO India

What Is A Limit Switch?

A Limit switch is used for automatic detection or for sensing the presence of an object, it also benefits in monitoring and indicating the movement limit of an object, whether it has been exceeded or not. Originally, the limit switches were used to define the limit or endpoint over which an object could travel before being stopped. It was at this point that the switch got its name as it was engaged in controlling the limit of travel.

There are 4 different types of limit switches namely:

  • => Whisker
  • => Roller
  • => Lever
  • => Plunger

Depending on the customers’ requirement limit switches might be combined with two of its general categories for example roller-lever.

How does it work?

A limit switch is used for industrial submissions in an electromechanical device, it consists of a mechanical actuator, which is linked to a series of electrical contacts. When an object comes in contact with the actuator plunger, there are movement that results in electric contact within the switch to close or open the electrical connection. The limit switch uses the mechanical movement of the actuator plunger in order to control or change the electrical switch state.

Related: Know About Limit Switches

Let us look at some of the applications, which would give you a better idea about the usage of limit switch, we all have seen a fridge right? So, what happens when you open the door of a refrigerator?  We all see a light that indicates that the door of the refrigerator is open, now how does that happen? Yes, a limit switch is used at the door column in a refrigerator to indicate whether the door is open or close.

Another example of limit switch, you can see at the overhead garage doors where a limit switch acts at stopping the upward movement of the door on reaching its full limit.

What are the Advantages and disadvantages of limit switches?

Advantages of Limit switch:

  • => Simple and straightforward designs.
  • => Exhibits high accuracy and repeatability.
  • => Simple for installation.
  • => Rugged and reliable.

They can be used to switch higher levels of current directly without the need to utilize secondary relay control.

Could be used to switch multiple loads.

Disadvantages or limitations of Limit Switch:

  • => Not suited for every application.
  • => They are used for instruments that operate at a relatively low speed because limit switch relies on mechanical action.

  • => They must get physically contacted with the target in order to operate, as they are contact sensors.

  • => Limit switch due to their mechanical design tends to wear down over time and hence needs time-to-time replacements.

This is the list of advantages and disadvantages of a limit switch.


This blog presents a brief overview of a Limit switch, which includes their operations, advantages and their limitations, by Jigo one of the leading switch manufacturers in India. For more information on the topic please contact us at mail us at

What Are Limit Switches? What Are Its Functions?

Limit Switch manufacturer India

Limit switch is a term which is very widely in the electrical industry. So let’s talk about what is a limit switch and what is its function.

The purpose of limit switches is to automatically detect the presence and absence of a material or object. Limit switches are basically contact sensing device which is widely used for detecting the presence or position of objects in industrial applications. As the name suggests, limit switches also sets the limit as safety interlocks in order to prevent machine parts after a specific point. The switch controls the limit of the travel.

Functions of a limit switch and how does it work –

An industry-based limit switch features a mechanical actuator linked to a series of electrical contacts and when the target comes in contact with the actuator, the electrical connection with the within the switch either open or close the electrical connection. With the use of the mechanical movement of the actuator, the limit switches turn the electric switch on or off.

Related Blog – What Is A Rocker Switch and How are Cars Using These?

As already mentioned that limit switch is very widely used tern industries, the most common of limit switch is during tallying materials. When the limit is reached, the switch closes or opens. Limit Switches are also widely used to prevent machine parts from moving any further when the specific point is reached. They can also be installed into machinery in order to control the instruments for standard operations or as emergency devices with the aim of preventing machinery malfunction.

Advantages of Limit switches –

  • The work well in any kind of industrial setting
  • They consume less power
  • They are simple to install, use and are very reliable
  • Can be used to switch multiple loads

There are various types of Limit switches, such as –

  • Snap switches
  • Heavy duty oil-tight switches
  • Gravity return switches
  • Safety locking and unlocking switches

JIGO is one of the leading manufacturers of limit switches in India. The limit switch we provide 81 series, 91 series, JG-WLD – JG-WLNJ, Compact Prewired Limit Switch, Sealed Limit Switch.