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Improving Safety In Machine Control Systems With Limit Switches

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  • Improving Safety In Machine Control Systems With Limit Switches
  • October 31, 2018

Improving Safety In Machine Control Systems With Limit Switches

Limit switches are critical components that provide established points to maintain efficiency and safety standards. They offer an effective way of monitoring and controlling a process and preventing accidents and injuries. They are electromechanical devices and are widely used in a range of industrial applications. The ease of use and reliability makes them a vital part of machine control systems.

Limit switches are sensors that are capable of detecting range of movement, speed or presence/absence. They are commonly used devices in a variety of industrial environments. One such example was in a conveyor belt application. When unforeseen errors occur, limit switches offer capability to instantly shutdown the process. The absence of a limit switch to stop the process can lead to product damage and can even be a hazard for the facility. In saying so, limit switches are essential components for control systems with mechanical moving parts

A limit switch can be chosen based on the precise needs of a situation. Here, we compiled lists of possible parameters to be considered when choosing the suitable sensors for your application.

Actuator Type:

Mechanical limit switches are equipped with a physical mechanism that generates the electrical signal to halt the machine. There are different types of actuator for detecting different types of motion; the most common being the plunger actuator. It is necessary to match the motion type to the actuator type to ensure that you are able to select the best actuator for your process.


Limit switches are available in a wide range of sizes. Selecting appropriate sizes is determined by factors like the size of the machinery and space available. For complex types of machinery with limited space, miniature sized switch is your best choice. For applications with large-scale machinery, it may be possible to use larger limit switches. Such switches offer the mechanical robustness that is required for such applications.


The performance of limit switches is also affected by the type of environment they operate within. Users should consider the temperature range, humidity, shock level and cleanliness of the operating environment. There are various types of limit switches designed to cater to the needs of a particular set of environments with features to alleviate the challenges associated with the specific environment.

Material Types

The material of the limit switches is also influenced by the type of application. Based on the operating temperature range and the corrosion resistance, it is possible to figure out the limit switch that will best work for a process.

The Electrical Specifications:

Since limit switches are electromechanical components, electrical specifications are necessary. It is determined by factors like the dimension. There is a current limit which determines how the limit switch is used in the electrical system.

The Mounting Configuration:

There are various types of actuator styles like surface mounted or side mounted. There is also horizontal and vertical actuator and it is necessary to ensure that the mounting holes are well-matched to the machine to which they are being installed.

A critical component of control systems, limit switches play a vital role in maintaining safety. Every application is different and it is essential to figure out the limit switch that will best work for your system. You can also consider the other specifications to select the best switch for your system. If you need help in selecting the right switch, feel free to get in touch with us at MeasureX.

At MeasureX, we aim to provide standard and customised solutions for a range of applications. You can call us on +61 (0) 3 9558 2420. Alternatively, you can also contact us through our online contact form.

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