Door Limit Switches – Application, Uses, Functions And More

Door Limit Switch | Application, Uses, Functions | JiGO Limit Switch

What is a Door Limit Switch?

A door limit switch is a switch that is used for automatic detection and for sensing the opening and closing of a door or the presence of an object.

For example, the refrigerator uses a door limit switch in order to check detection whether the door of the fridge is opened or closed, as once you open the door of a refrigerator a light glow up, well that’s what a door limit switch does.

The garage door opener also has a door limit switch to shut it off once it reaches the opening or closing position. 

Limit Switch Application And Function?

Limit switch or door limit switch are often used for tallying items or materials, to detect the limits and when it’s reached the switch closes or opens. For example, the limit switch application in a specific piece of equipment detects several predetermined components that are added to a product, the limit switch moves the actuator, which results to move the piece of equipment away, therefore sending the product onto the next station.

Limit switch application and door limit switch are also used as safety interlocks to prevent machine parts from moving further after reaching a specific point. The above-given example of the garage door can be an effective instance, as without a door limit switch the garage door would keep moving downwards and eventually crash into the ground, which might cause some serious damage. 

Related: Limit Switch – Everything You Need To Know About The Device

Why are Limit Switches Important?

Limit switches are cost-effective and help to create a link between the physical and electrical domains. Limit switch applications have been developed several decades ago and their massive interests for uses helped them significantly in lowering their cost for the end-users. Hence making them an important product in the role of manufacturing due to their simplicity and low cost. 

Use cases of Limit Switches

  • Product detection and count – here when a product is pushed against a door limit switch, it sends a signal to control the system. By using the simple PLC ladder concept, the user can count the number of times the product pushes the limit switch and display the counter for the operator. 

  • Personal safety – the door limit switch or limit switch application can be used to detect the opening of a safety guard of a machine. Here if the guard is opened while the machine is motionless, the door limit switch prevents it from starting. In another case, if the guard is opened during operation, the machine stops. Therefore, limit switch in both the cases is used to safeguard the operator from any kind of potential harm. 

  • Machine safety – here a limit switch application is used to protect machinery from unintentional damage. These include components like the end of arm tools, motor clutch, and components that may damage others if they fail like gear, shafts, etc. 

Conclusion on the limit switch application 

This blog presents a brief overview of door limit switch and limits switch applications, which includes their use functions and their importance, by Jigo one of the leading limit switch manufacturers in India.

For more information on the topic please contact us at or mail us at

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

Everything You Need To Know About Limit Switches

Everything you need to know about limit switches

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 –

  • => The designs are generally quite simple and neat
  • => They work perfectly in almost any industrial setting
  • => The showcase high accuracy and repeatability
  • => They consume less energy
  • => They are simple to install and are reliable
  • => They can switch multiple loads

Related: Highlighting The Uses Of 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.

Highlighting The Uses Of Limit Switches

Highlighting The Uses Of Limit Switches

Limit Switches are widely used in the electrical engineering industry. It is a piece of electromechanical equipment that is used to automatically detect the presence of an object in order to monitor the movement limits of an object. As these switches are used to define the travel limit of an object, they are called Limit Switch.

When an object comes in physical contact with the actuator, the actuator plunger’s movement causes the electrical contacts in the switch to either open or close their electrical connection. When a certain limit is reached, the actuator can de-activate or activate a device in order to prevent malfunctioning or errors.

Limit Switches are often used for the purpose of tallying items or materials so that when a limit is reached, the switch either closes or opens. It consists of an actuator with the operating head, the switch body mechanism, and a series of electrical terminals that are used to connect the switch to the electrical circuit that it is controlling.

Related: What Are Limit Switches? What Are Its Functions?

Limit switches can be installed into machinery as control instruments for standard operations or can also be installed as emergency devices so as to prevent malfunction of the machine.

There are a variety of limit switches available, such as –

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

Advantages offered by limit switches –

  • They are suitable in almost every industrial setting
  • They exhibit high accuracy and repeatability
  • They consume less power
  • They can switch high-inductance loads
  • They are easy to install and use
  • They can be used to switch multiple loads

These are some of the uses and advantages of limit switches. If you are planning to purchase limit switches then make sure you are doing so from a reputed limit switch manufacturer in India. At Jigo, we manufacture and supply the best quality limit switches all over the country.