Limit Switches Key benefits Detect endoftravel positions reliably to protect equipment and operators. Easy to integrate with standard control systems such as PLCs and relays. Multiple actuation options to fit different machine geometries (lever, roller, plunger, short plunger). Rugged construction with durable housings and seals for industrial environments. Long service life with repeatable, consistent switching across cycles and conditions. Product overview Limit switches are compact electromechanical devices that sense the position of moving parts. They provide a discrete on/off signal when a travel limit is reached. Available in several actuation styles and configurations to support a range of automation applications, with variants designed for different environments and mounting options. Key features Actuation options: lever, roller, plunger, and short plunger variants; some models support alternative actuation methods. Contact configurations: SPDT (single pole double throw) and DPDT versions available to fit various wiring schemes and logic requirements. Electrical compatibility: designed for standard industrial control circuits and control voltages; exact ratings depend on model. Contact material: silver alloy contacts for low resistance and reliable switching. Housing and mounting: robust housings in stainless steel, zinc alloy, or phenolic resin; multiple mounting patterns to suit panel, throughhole, or aerospacestyle installations. Environmental protection: sealed or weatherproof variants with protection against dust and moisture; suitable for production floors and outdoor or damp environments. Operating temperature: suitable for a wide range of factory temperatures and conditions. Durability: engineered for cycle life with consistency in switching across vibration and temperature variations. Compatibility and integration Designed to interface with standard PLC inputs, relays, and control circuits. Wiring options include quickconnect terminals or screw terminals, compatible with common control wiring practices. Mounting compatibility with common machine frames and enclosures; standardized actuator and shaft configurations for retrofits and installations. Physical attributes Size range: miniature to standard size limit switches to fit tight spaces or common mounting footprints. Materials: housing options include stainless steel, brass, zinc alloy, and phenolic resin; actuators made from corrosionresistant metals or durable plastics. Travel and actuation: various stroke lengths and actuator types to match machine travel paths. Performance and reliability Repeatable switching at precise travel points for accurate position sensing. Low contact resistance and stable insulation resistance for clear signal transmission. Sealed and rugged designs reduce wear from dust, oil, and moisture, supporting dependable operation over time. What to consider when selecting Actuation path and space: choose lever, roller, or plunger based on how the moving part interacts with the switch. Electrical needs: select the appropriate contact configuration (SPDT/DPDT) and voltage/current ratings for the control system. Environment: pick the IP rating, material, and sealing appropriate for dust, moisture, or chemical exposure. Mounting: verify mounting pattern and footprint for retrofit compatibility or installations. Typical use scenarios Endoftravel detection on a conveyor: a limit switch mounted at the end of travel signals the controller to stop the belt and prevent overrun. Safety interlock on a machine guard: closing the guard activates the switch to allow operation; opening the guard interrupts power to ensure operator safety. Position sensing on a robotic arm: limit switches placed along the travel path provide home or endofrange references for precise motion control. Maintenance and service Inspect actuators and housings periodically for smooth operation and signs of wear. Check contact resistance and insulation resistance as part of routine maintenance. worn actuators or seals to maintain performance and environmental protection.