Autonics BW40-04 Area Sensor
Autonics BW40-04 Through-Beam Area Sensor (40 mm Pitch, NPN Output)
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The Autonics BW40-04 is a through-beam type area sensor featuring 4 optical axes with 40 mm pitch, suitable for detecting objects passing through a defined sensing area. Its compact sensing height makes it ideal for small conveyors, counting stations, and limited-space automation systems.
With stable infrared detection, IP65 protection, and self-diagnostic functions, BW40-04 delivers reliable performance in demanding industrial environments.
Key Features
Through-beam area sensing (emitter + receiver)
40 mm optical axis pitch
4 optical axes for compact detection zones
Sensing height: 120 mm
Long sensing distance up to 7 m
NPN open-collector output
Fast response time ≤ 10 ms
Self-diagnosis & optical axis misalignment alarm
Mutual interference prevention (MASTER/SLAVE)
IP65 protection for industrial use
Technical Specifications
| Parameter | Value |
|---|---|
| Model | BW40-04 |
| Sensing Method | Through-beam |
| Optical Axis Pitch | 40 mm |
| Number of Optical Axes | 4 |
| Sensing Height | 120 mm |
| Sensing Distance | 0.1 – 7 m |
| Light Source | Infrared LED (850 nm, modulated) |
| Output Type | NPN open collector |
| Operation Mode | Light ON |
| Response Time | ≤ 10 ms |
| Power Supply | 12–24 V DC |
| Current Consumption | ≤ 120 mA |
| Load Current | ≤ 100 mA |
| Protection Rating | IP65 |
| Ambient Light Immunity | Up to 100,000 lux |
| Operating Temperature | −10 to +55 °C |
Applications
Small conveyor object detection
Counting & sorting machines
Packaging & labeling equipment
Assembly line part detection
Material handling systems
What’s in the Box?
Emitter unit × 1
Receiver unit × 1
Mounting brackets (A & B)
Fixing bolts
Instruction manual
FAQs
Q1. Is BW40-04 suitable for safety applications?
No. This product is not a safety light curtain and must not be used for personnel protection.
Q2. What size objects can it detect?
Suitable for opaque objects ≥ 50 mm in diameter.
Q3. Can multiple BW40 sensors be installed together?
Yes, using the MASTER/SLAVE interference prevention function.
Q4. What output type does BW40-04 provide?
NPN open-collector output.