Inspection / normal switch (NO)
LA137-BD21
The BESTECH BS-S3-B1370 is a roller-type limit switch built for elevator and lift systems. It works as an elevator roller switch that detects the position of the lift car or door using a roller actuator. This lift roller limit switch is commonly used in door machine assemblies and car frame positions.
As an elevator safety switch, it helps the lift control system know when to stop or change direction. The roller mechanism ensures smooth and repeatable contact, which is important for lift safety and performance.