The Autonics BJ3M-PDT is a polarized retro-reflective photoelectric sensor designed for stable and accurate detection of transparent, shiny, or reflective objects. With a 3-meter sensing distance, compact BJ housing, and NPN/PNP output, it is widely used in packaging lines, bottling machines, and conveyor systems.

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Key Features

• Polarized retro-reflective sensing type
  
• Sensing distance up to 3 m
  
• Reliable detection of transparent & glossy objects
  
• NPN & PNP open-collector outputs
  
• Light-ON / Dark-ON selectable
  
• Built-in sensitivity adjustment
  
• Compact rectangular BJ housing
  
• High resistance to background reflection
  
• IP65 protection rating
  
• Cable type (standard cable length)

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Technical Specifications

Parameter	Specification
Model	BJ3M-PDT
Sensing Type	Polarized Retro-Reflective
Sensing Distance	Up to 3 m
Light Source	Infrared LED (polarized, ~850 nm)
Output Type	NPN & PNP open collector
Output Mode	Light-ON / Dark-ON
Response Time	≤ 1 ms
Supply Voltage	12–24 VDC ±10%
Load Current	≤ 100 mA
Protection Rating	IP65
Operating Temperature	−25 to +55 °C

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Applications

• Transparent bottle detection
  
• Packaging & bottling machines
  
• Conveyor object detection
  
• Counting & positioning systems
  
• Material handling equipment
  
• OEM industrial automation

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What’s in the Box?

• Autonics BJ3M-PDT Photoelectric Sensor
  
• Reflector (standard)
  
• Mounting bracket
  
• Adjustment screwdriver
  
• Mounting screws & nuts
  
• Instruction manual

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FAQ

Q1. What type of sensor is BJ3M-PDT?
It is a polarized retro-reflective photoelectric sensor.

Q2. What is the maximum sensing distance?
Up to 3 meters, depending on reflector alignment.

Q3. Why choose a polarized model?
Polarization helps reliably detect transparent and reflective objects.

Q4. Does it support both NPN and PNP outputs?
Yes, it provides both NPN & PNP open-collector outputs.

Q5. Is it suitable for packaging lines?
Yes, it is commonly used in packaging, bottling, and conveyor automation.