Omron EE-SPY401 Slot Photoelectric Sensor, 0.09 kg

The EE-SPY401: Slot sensors like this one are used for detecting objects passing through a fixed gap — typical in packaging, labeling, and assembly lines where repeatable presence or counting is needed in a compact footprint. The built-in emitter and receiver are aligned across the slot; the output toggles when an object breaks the beam.