OMRON F39-HGB1940 [Price]
F39-HGB1940 Sensing method: Through-beam type (with slot). Sensing distance: 3.6 mm (slot width).

OMRON spatter protection cover F39-HGB1940 INSTRUCTION sheet [Download]
F39-HGB1940 PDF. by reducing errors. Simple wiring with only 4 wires. Fast response time of 5 ms