Photoelectric Sensor Panasonic CX421PZ CX400 series — diffuse reflective light sensor, detection range 300 mm

The Panasonic CX421PZ from the CX400 series is a diffuse reflective photoelectric sensor designed for short-range object detection. With a specified sensing range of 300 mm, this light sensor provides compact optical detection suitable for industrial automation and assembly tasks. It is intended for applications that require reliable presence sensing of small parts or materials on conveyors, pick-and-place stations and packaging lines where diffuse reflection from object surfaces is used to trigger detection.

Advantages

The CX421PZ combines compact dimensions with a diffuse reflective detection method that does not require separate reflectors, simplifying installation in confined spaces. Its 300 mm sensing range is optimized for short-distance detection of a variety of surface types, and the sensor design is intended for stable switching performance in dynamic production environments. Built to integrate with common automation setups, it offers straightforward optical sensing without additional moving parts.

Suitable for

• Detecting presence of small components on conveyors and feeders
• Short-range object detection at pick-and-place stations
• Part detection in packaging machines and labelling lines
• Position sensing where diffuse reflection from object surfaces is available

Key specifications

• Detection method: diffuse reflective
• Sensing range: up to 300 mm
• Output type: photoelectric switching (light sensor)
• Application environment: industrial automation and assembly lines
• Mounting: compact form factor for confined spaces

How to use

Mount the sensor so that its optical axis faces the area where target objects will pass and ensure that the distance to the target does not exceed the 300 mm sensing range. Align the sensor to receive diffuse reflection from the object's surface; highly absorbent or very glossy surfaces may require adjustment of angle or distance to obtain reliable switching. Connect the sensor to the control system using the appropriate wiring and follow the manufacturer's guidelines for supply voltage and output interfacing. Perform an initial teach or sensitivity check, if available, and verify switching stability under actual operating conditions.

Usage recommendations

For consistent detection, test the sensor with representative parts and adjust mounting position to maximize diffuse reflection. Avoid direct exposure to intense ambient light or strong infrared sources that can affect sensing. Periodic cleaning of the optical window is recommended in dusty environments to maintain stable performance.