See Brady продукты
Optical Sensor - 0.160" (4.06mm) - Through-Beam - Phototransistor Output - 50 mA (If)(Max) - 30 mA (Ic)(Max) - 30 ...
Photointerrupter Transmissive 3.18mm Photologic, Open Collector, Inverter Automotive 5-Pin Bag
Photointerrupter Transmissive 3.3mm Phototransistor 4-Pin
Photologic Slotted Optical Switch - 0.375" (9.53mm) - Through-Beam - NPN Open Collector, Inverted Output - 15mA 4 ...
Photointerrupter Transmissive 3.18mm Phototransistor 4-Pin
Photo micro sensor interrupters
Photointerrupter Transmissive 3.18mm Photologic, Pull up, Buffer 4-Pin
Pre-wired Photomicrosensor with Amplifier and Cable