Photoelectric Fork Sensor Panasonic PM-U25-P U-type fork, bright/dark switching, 5–24 V DC

The Panasonic PM-U25-P is a U-shaped photoelectric fork sensor designed for non-contact detection of small or thin objects on production and packaging lines. It supports both light-on (bright) and dark-on (dark) switching modes and operates within a 5–24 V DC supply range. The compact fork geometry allows stable detection of edges, parts and presence/absence checks where space is limited and fast response is required.

Advantages

The fork configuration provides precise alignment and repeatable sensing of narrow targets without mechanical contact. Dual switching modes (bright/dark) make the sensor flexible for different background and target reflectivity conditions. Wide operating voltage compatibility simplifies integration into existing DC-powered control systems. The sensor’s compact size and stable optical design reduce false triggers and allow installation in confined spaces.

Suitable for

• Presence/absence detection of small components on conveyor belts
• Edge detection and registration on film, labels or thin materials
• Counting of parts or push-button actuations in automated assemblies
• Non-contact sensing in packaging, printing and electronic assembly lines

Key specifications

• Sensor type: U-shaped photoelectric fork sensor
• Switching modes: light-on (bright) and dark-on (dark)
• Supply voltage range: 5–24 V DC
• Output type: switching output suitable for control inputs (refer to system requirements for current/voltage limits)
• Detection capability: designed for narrow, thin or low-mass targets due to compact fork aperture
• Mounting: through-fork installation for inline object passage and fixed alignment

How to use

Mount the PM-U25-P so that the object to be detected passes through the fork aperture with stable alignment. Select the appropriate switching mode (light-on or dark-on) according to the target and background contrast, then connect the sensor to a compatible DC supply within the 5–24 V range. Wire the sensor output to the machine controller or relay input using recommended cable and observe polarity and grounding practices. Adjust positioning and, if available, any sensitivity settings to obtain reliable switching without false positives.

Usage recommendations

For best results, ensure the target passes centrally through the fork and minimize ambient light interference. When installing in high-dust or high-vibration environments, use protective mounting and periodic cleaning to maintain stable detection. Verify compatibility of the sensor’s switching output with the control circuit and follow manufacturer wiring diagrams for safe integration.