[BULK] 500 x Optical Endstop Switch Sensor - Photoelectric Light Control Optical Limit Switch Module for 3D Printer

The optical switch is a reliable stop/switch solution for any type of 3D printer/CNC/3D tool.
Advantages: Using optically transmissive principles of design, no loss, no noise, and longer life(more than one hundred thousand times).
Triggering is sensitive and quiet.
Repeat positioning is in high accuracy.
Tips: Generally, the system need at least three optical switches.