Autonics BEN3M-PDT Photoelectric Sensor
Autonics BEN3M-PDT Polarized Retro-Reflective Photoelectric Sensor (3 m, NPN/PNP)
Polarized retro-reflective photoelectric sensor with 3 m sensing distance and DC transistor output.
Ideal for reliable detection of transparent or shiny objects on conveyors and packaging machines.
The Autonics BEN3M-PDT is a polarized retro-reflective photoelectric sensor designed for stable detection of transparent, glossy, or reflective objects. With a 3-meter sensing range, fast response time, and NPN/PNP transistor output, it is widely used in packaging, bottling, and conveyor automation systems.
Key Features
Polarized retro-reflective sensing type
Sensing distance up to 3 m
Reliable detection of transparent & shiny objects
DC power, solid-state transistor output
NPN & PNP open-collector outputs
Light-ON / Dark-ON selectable
Fast response time (≤ 1 ms)
Stable operation under ambient light
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | BEN3M-PDT |
| Sensing Type | Polarized Retro-Reflective |
| Sensing Distance | Up to 3 m |
| Light Source | Infrared LED (polarized) |
| Output Type | NPN & PNP open-collector |
| Output Mode | Light-ON / Dark-ON |
| Response Time | ≤ 1 ms |
| Supply Voltage | 12–24 VDC ±10% |
| Load Current | ≤ 200 mA |
| Protection Rating | IP50 |
| Operating Temperature | −20 to +65 °C |
Applications
Detection of transparent bottles
Packaging & bottling machines
Conveyor object detection
Counting & positioning systems
Material handling equipment
OEM automation machinery
What’s in the Box?
Autonics BEN3M-PDT Photoelectric Sensor
Polarized reflector (standard)
Mounting bracket & hardware
Adjustment screwdriver
Instruction manual
FAQ
Q1. What does “PDT” mean in BEN3M-PDT?
PDT indicates a polarized retro-reflective type, suitable for transparent or glossy objects.
Q2. What is the maximum sensing distance?
Up to 3 meters, depending on the reflector and alignment.
Q3. Can it detect transparent objects like PET bottles?
Yes, polarized optics help reliably detect transparent and shiny objects.
Q4. Does it support both NPN and PNP outputs?
Yes, it provides NPN & PNP open-collector outputs.
Q5. Is it suitable for high-speed conveyors?
Yes, with ≤ 1 ms response time, it works well in high-speed applications.