Photoelectric Beam Sensor Security Alarm | Single & Double Beam
Photoelectric Beam Sensor Security Alarm | Single & Double Beam
Photoelectric Beam Sensor Security Alarm – Single & Double Beam Detector
Upgrade your property's perimeter security with the LIHTNE Model 218D Photoelectric Beam Sensor. Designed for automatic doors, entryways, driveways, and commercial access points, this versatile detector delivers reliable intrusion detection using infrared beam technology — available in both single-beam and double-beam configurations to suit your specific security needs.
Made in Mainland China.
Key Features
- Easy Wiring: Pull-in & pull-out type socket design makes installation straightforward — no specialist tools required.
- Microcomputer Control Technology: High integration and stability for dependable, long-term operation.
- Precision Optical Lens: International-standard lens design with excellent focus quality and a well-controlled detection angle for accurate beam alignment.
- Long Transmission Range: Up to 10 metres (approx. 33 ft) maximum transmit distance with strong anti-interference capability.
- German-Technology Filter System: Receiving filter, decoding, and amplification system effectively eliminates interference from natural daylight and ambient light sources.
- Low-Power Emission Design: Energy-efficient infrared emitter extends device lifespan while maintaining maximum range.
- Flexible Contact Output: Selectable NO (Normally Open) or NC (Normally Closed) relay contact — adapt the sensor to your existing alarm or access control system.
- Wide Voltage Input: Accepts AC/DC 12–36V, compatible with most standard security and automation power supplies.
- Built-in Fault Warning: The sensor automatically triggers a warning alarm if it detects an issue with the eye sensor, so you're always informed of your system's status.
- Shielded Signal Lines: Emission and receive contacts are output separately with shielding line for clean, noise-free signal transmission.
Technical Specifications
| Power Supply | AC/DC 12–36V |
| Static Power | 12–18 mA |
| Action Current | 12–58 mA |
| Max Transmit Distance | 10 m (approx. 33 ft) |
| Beam Configuration | Single Beam / Double Beam (selectable) |
| Contact Output | NO / NC (selectable) |
| Working Temperature | -42°C to 45°C |
| Working Humidity | 10–90% RH |
| Controller Size | 105.5L × 53.4W × 28.5H mm |
| Magic Eye Head Size | 19L × 13D mm |
| Model | 218D |
| Brand | LIHTNE |
| Country of Origin | Mainland China |
Common Applications
- Automatic sliding and swing doors
- Driveway and gate access control
- Warehouse and industrial entry detection
- Home and commercial perimeter security systems
- Retail storefront entry counters
For guidance on home and business security best practices, visit the U.S. Consumer Product Safety Commission (CPSC) for product safety standards and consumer resources.
Frequently Asked Questions
Q: What is the difference between single beam and double beam mode on this photoelectric sensor?
A: In single beam mode, one infrared beam is transmitted between the emitter and receiver — interrupting this single beam triggers the alarm output. Double beam mode uses two beams simultaneously, which reduces false triggers from small objects like insects or blowing debris, making it ideal for outdoor or higher-security installations where reliability is critical.
Q: Is this photoelectric beam sensor compatible with my existing alarm or access control system?
A: Yes. The Model 218D features a selectable NO (Normally Open) or NC (Normally Closed) relay contact output, making it compatible with the vast majority of standard security alarm panels, automatic door controllers, and access control systems. It also accepts a wide AC/DC 12–36V power input, working with most common power supplies.
Q: Can this sensor be used outdoors?
A: The LIHTNE 218D is engineered with a German-technology daylight-interference filter system, allowing it to function reliably in environments with varying ambient and natural light. Its wide operating temperature range of -42°C to 45°C also makes it suitable for use in a broad range of climates. Please ensure appropriate weatherproofing of wiring connections for fully exposed outdoor installations.
Q: How difficult is it to install this photoelectric beam detector?
A: Installation is designed to be straightforward thanks to the pull-in & pull-out type socket for easy wiring. The precision optical lens with a controlled beam angle makes alignment simple. Most users with basic DIY or electrical knowledge can complete the installation without specialist assistance.