Azbil Corporation SL1-A Limit Switch Roller Plunger

The Azbil SL1-A Limit Switch with a top roller plunger is a compact, horizontal limit switch designed for reliable end‑of‑travel sensing in automation equipment, integrating a roller plunger actuator, a SPDT contact arrangement, and a rugged two‑piece spring mechanism for long life. It operates with a single pole double throw (SPDT) circuit (one normally open, one normally closed) and is rated for up to 5 A at 250 VAC or 30 VDC, making it suitable for mid‑range control tasks on conveyors, presses, and packaging machines while maintaining a small footprint. The SL1‑A family is built for longevity, with Azbil citing as many as 20 million mechanical operations in general‑purpose use; the unit typically weighs about 0.08 kg and uses a top roller plunger that provides smooth, positive actuation. An integrated diaphragm seal around the internal plunger helps resist coolant ingress in harsh industrial environments, and the device can be mounted in tight spaces where quick, dependable sensing is critical for accurate position feedback and safe machine operation.