What are mechanical sensors and safety limit switches?

Limit switches are electromechanical devices which detect the presence or absence of an object. They can also detect positioning, speed and range of movement. When unsafe conditions arise, the limit switch can break a live circuit, mitigating the danger.


Generally, safety limit switches are identified to 4 types: roller, plunger, lever, and whisker. Depending on the application, a limit switch may be a combination of two - for example, roller-lever or roller-plunger.


Common uses for safety limit switches

Limit switches are part of our everyday lives. When you open a door of the refrigerator, a limit switch detects that the door is open and triggers the light inside to turn on.


Mechanical sensors and safety limit switches also have many uses in industrial applications. In packaging, limit switches are used to detect the limit of boxes being stacked in a pallet. Food and beverage businesses can also use limit switches along with an automated pallet stacking system to detect when pallets have been loaded to their desired level.


Why choose OMRON limit switches?

OMRON has a comprehensive portfolio of limit switches for both safety and non-safety applications. Our range offers easy installation, long operational life and oil resistance. It includes:


- General-purpose vertical and horizontal switches, which cover a wide variety of environments and applications. Horizontal switches are suitable for applications demanding higher mechanical strength or dust/drip-proof properties.

- Touch switches with a high contact reliability for micro loads and solid-state touch switches with cylindrical or limit-type actuators.

- Multi-pole limit switches which can be used in sequence control of machine tools, transfer machines, and other equipment.


See our comprehensive range of limit switches below. For more information, contact us today.