From RS PRO this is the Hermetically Sealed Environmentally Sealed (HEN) limit switch designed and engineered to provide excellent protection in harsh and demanding environmental conditions. As the limit switch is hermetically sealed it provides airtight protection from dirt, dust moisture and other contamination ensuring no compromise of the limit switches performance.

Adding to the RS PRO environmentally sealed limit switch protection is the 300 series stainless steel housing and bushing, vibration and impact protection, extreme temperature protection. a service life of 25,000 electrical and mechanical operations all with the environmental sealing symbol 4 MIL-PRF-8805.

A Limit Switch is especially important within industrial automation and control systems providing essential information and safety measures. Designed to detect the presence or absence of an object or to monitor the position of a moving part within an industrial process, machine, or equipment. A Limit Switch ensures that a component will stop, start, or change direction when required.

There are many benefits in using limit switches within mechanical and industrial environments as they provide precise control, safety, and feedback.

• Position sensing limit switches accurately sense the position of a mechanical component


• Safety limit switches, important within industrial processes, preventing accidents and damage when something unsafe it detected by signalling a system to stop


• Automation limit switches are vital within automation and control as the control machinery, equipment and processes providing important feedback to a control system


• Mechanical actuation limit switches operate by physical contact with a moving part or object triggering the switch to change its state


• The switches have electrical contacts that change their position when actuated, normally open (NO), normally closed (NC) or both NO+NC


• Limit switches are a hard-wearing reliable component specially designed to stand up to mechanical wear, the environment, and extreme industrial conditions


• Limit switches are available in various actuator types suitable for different applications, no matter the job there is a limit switch available for your requirements


• Flexible and easy to install and integrate into existing systems, easily mounted reducing any equipment downtime


• Limit switches provide you with feedback allowing you to identify and deal with any problems within a system

RS PRO is the own brand of RS. The RS PRO Seal of Approval is your assurance of professional quality, a guarantee that every part is rigorously tested, inspected, and audited against demanding standards. Making RS PRO the Smart Choice for our customers.