Pneumax 1500U 1500 U Universal Magnetic Sensor Reed Switch for sale online | eBay
L Type U Type Sensor Slot Photoelectric Switch LU674-5NA Limit Induction | eBay
Groove /u Type Photoelectric Sensor Pnp Nc Switch E3s-gs7p2 Normally Close Sensor Dc 3 Wires Distance 7mm - Switches - AliExpress
Wired Infrared Sensor Bar Fit for Nintendo Wii /Wii U Console, TSV 2/1 Pcs Wired IR Ray Motion Receiver Sensor Bar With Stand for Nintendo Wii Wii U - Walmart.com
L Type U Type Sensor Slot Photoelectric Switch LU674-5NA Limit Induction Switch | eBay