Catalog > Internet of Things (IOT) Related Products > More Platforms Optical Endstop Sensor Optical Endstop Sensor BSK END STOP SWITCH KIT OPTICAL END STOP SWITCH KIT FOR 3D PRINTER OR CNC Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview Some endstops are needed in a 3D printer , this opto Endstop for CNC 3D Printer RepRap Makerbot Prusa Mendel RAMPS is very accurate and reliable . When the light inside the sensor is blocked, Opto Endstop will immediately output the digital signal, and the LED will be on thus to remind you the working state of this sensor. Features Operating Voltage : DC 5VOutput : DigitalContents1 x Opto Endstop Switch1 x 3 Pin Cable References