Photoelectric Reflexion Sensor Panasonic CX491 — Reflexion Type, Range 3 m, Series CX400

Panasonic CX491 is a reflected-light photoelectric sensor from the CX400 series with a nominal sensing range of 3 m. The device integrates emitter and receiver in a single housing and detects objects by measuring light reflected from the target surface. It is designed for industrial automation tasks where presence detection, simple counting or conveyor control are required. The compact construction and reflexion-type operation make the sensor suitable for applications that do not allow separate transmitter and receiver alignment.

Advantages

The reflexion design simplifies mounting because only one unit is required, reducing installation complexity. With a specified range up to 3 m, the CX491 accommodates medium-distance detection while maintaining stable response to reflective surfaces. The sensor is built to industrial standards for reliable operation in production environments and supports straightforward integration into existing control systems due to its standard output interfaces and compact form factor.

Suitable for

• Presence and absence detection on conveyors
• Piece counting and throughput monitoring
• Basic positioning where reflective contrast exists
• Object detection in packaging and material handling

Key specifications

• Detection principle: reflected-light (reflexion) photoelectric sensing
• Nominal sensing range: 3 m (dependent on target reflectivity)
• Integrated emitter and receiver in a single housing
• Construction: compact industrial housing suitable for control panel or machine mounting
• Typical applications: presence detection, counting, conveyor control, simple positioning

How to use

Mount the sensor so that the sensing face faces the target area and ensure the target surface provides sufficient reflectivity for reliable detection. Align the sensor to avoid stray reflections and to keep the beam path free of obstructions. Connect the unit to the control system following the manufacturer wiring and power specifications, and verify detection using target samples at expected operating distances. Adjust sensitivity or mounting position as required to obtain stable switching without false triggers.

Recommendations

Use targets with moderate to high reflectivity for best range performance and avoid highly absorbent or specular surfaces that can reduce detection reliability. Perform installation tests under actual lighting and environmental conditions to confirm stable operation. For long-term reliability, protect the sensing face from accumulation of dust, oil or debris and schedule periodic cleaning as part of routine maintenance.