1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your FD Universal Infrared Beam Sensor. This photoelectric infrared detector is designed for various security and automation applications, including door and window security, automatic door systems, gates, and fences. Its sealed waterproof design makes it suitable for both indoor and outdoor use.

Compact design of the single-beam infrared spotting sensors.
2. Safety Information
- Ensure the power supply is disconnected before any installation or maintenance work.
- This device operates on 12-24V DC/AC. Verify your power source matches these requirements.
- Installation should be performed by qualified personnel to prevent electrical hazards.
- Do not expose the sensor to extreme physical impact.
- When used for burglary detection, the sensor must be connected to a compatible alarm host (purchased separately). It cannot function as a standalone alarm.
3. Package Contents
The package typically includes:
- Infrared Beam Sensor Unit (Light Receiver)
- Infrared Beam Sensor Unit (Light Thrower / Emitter)
- Mounting accessories (screws, anchors)
- User Manual (PDF version available at PDF Manual Link)

Internal view of the Infrared Beam Sensor units, showing the circuit boards and components.
4. Specifications
| Feature | Specification |
|---|---|
| Technology | Infrared |
| Range | ≤15m (Reduced by 30% in bad weather conditions like rain, dust) |
| Infra-Red Frequency | 1.92kHz |
| Power Supply | 12 to 24V DC/AC |
| Wavelength | 940nm |
| Input Current | RX 15mA - TX 30mA |
| Operating Temperature | -25°C to 55°C |
| Relay Output | 1A max 36V |
| Dimensions | 49.2 x 76 x 29.6mm |
| Certification | CE |
| Origin | Mainland China |

Infrared Beam Sensor units demonstrating waterproof and moisture-proof design, suitable for humid areas.
5. Installation & Setup
5.1. Connecting the Sensor (Wiring)
The sensor consists of a Light Receiver and a Light Thrower (Emitter). Refer to the diagram below for wiring connections.

Detailed view of the Light Receiver and Light Thrower (Emitter) terminals for wiring.
- Light Receiver (HW01T Rev 2.0): Connect the 12V-24V power supply (positive and negative terminals) and the signal output (COM and OUT terminals).
- Light Thrower (Emitter) (HW01R): Connect the 12V-24V power supply (positive and negative terminals).
- Relay Connections: The Light Receiver includes terminals for JUMP, NC (Normally Closed), NO (Normally Open), and NC OR NO for relay output, depending on your application's requirements.
5.2. Mounting the Sensor
Follow these guidelines for optimal performance:
- Installation Height: The ideal installation height should be greater than 20 cm from the ground.
- Installation Distance: Maintain an installation distance of no less than 2 meters between the receiver and emitter.
- Alignment: Ensure the red outside protection of both units is perpendicular to the mounting surface.
- Sequence: Install the Light Receiver unit first. Then, install the Light Thrower (Emitter) unit.
- Alignment Check: Align the units until the 'OFF light' on the receiver is activated, indicating proper beam detection. Once aligned, secure the units and connect the wiring.
- Sunlight Avoidance: Avoid installing the sensors where they will be exposed to direct sunlight, as this can interfere with performance.
6. Operating Instructions
6.1. Door and Window Security
Install the sensors on both sides of the door or window frame. The main alarm unit should be installed indoors. When someone blocks the infrared beam, the connected alarm host will trigger an alert. Note that the sensor requires an alarm host (purchased separately) for burglary detection and cannot be used alone.

Application example: Infrared Beam Sensors installed for door and window security.
6.2. Automatic Door, Sliding Door, and Anti-Pinch Sensor
For automatic door applications, install the sensors on both sides of the door and wire them to the door controller. When a person or object passes through and blocks the infrared beam, the door will automatically open or reverse, functioning as an anti-pinch safety mechanism.

Application example: Infrared Beam Sensors used with an automatic sliding door.
7. Maintenance
To ensure consistent performance and longevity of your infrared beam sensors:
- Regularly clean the sensor lenses with a soft, dry cloth to remove dust, dirt, or moisture that may obstruct the infrared beam.
- Inspect wiring connections periodically for any signs of wear or damage.
- Ensure the mounting remains secure and the sensors are properly aligned.
8. Troubleshooting
- No Reaction / Beam Not Detected (Sensors Too Close): If the distance between the emitter and receiver is too short, the sensor may not react. Try increasing the distance by at least one meter.
- Unreliable Detection (Sensors Very Close): If detection is inconsistent at very close distances, you may remove the condensing lens from the emitter and/or receiver to improve performance.
- False Alarms / Intermittent Operation: Check for obstructions in the beam path (e.g., spiderwebs, debris). Ensure the sensors are not exposed to direct sunlight or strong artificial light sources that could interfere with the infrared beam. Re-check alignment.
9. User Tips
- For outdoor installations, consider adding a protective cover to shield the sensors from heavy rain or snow, even though they are waterproof.
- Test the sensors periodically after installation and after any significant weather changes to ensure they are functioning correctly.
- When installing multiple sets of sensors in close proximity, ensure their beams do not interfere with each other.
10. Compliance & Certification
This product is CE certified, indicating compliance with European health, safety, and environmental protection standards.
11. Support
For further assistance or detailed technical diagrams, please refer to the official user manual available in PDF format: Download User Manual (PDF).