Slot type photoelectric sensor with 9 mm throughslot design Function and sensing Uses an infrared emitting diode and an NPN photoelectric transistor to detect nontransparent objects passing through its 9 mm slot. The sensor provides a low level output when a nontransparent object passes the slot, enabling reliable object detection in tight spaces. Signal quality and performance Employs Schmidttrigger technology to generate stable, jitter pulses, suitable for precise timing tasks such as small car speed measurement and distance measurement. Installation and reliability Easy to mount with installation holes at both ends, allowing secure screw fastening for a sturdy and reliable setup. Key attributes Slot width: 9 mm Output: low level trigger Output type: NPN photoelectric transistor Technology: Schmidttrigger for clean, stable signals Optics: infrared LED Applications and use scenarios Conveyor or assembly lines for counting opaque items as they pass through the slot. Measurement setups requiring accurate speed or distance data on small moving parts (for example, small car speed and distance measurements). Presence or position sensing in packaging, automation, or smallscale manufacturing environments where a compact slot sensor is needed.