24GHz Microwave Radar Motion Sensor for Automatic Doors
24GHz Microwave Radar Motion Sensor for Automatic Doors
24GHz Universal Microwave Radar Motion Sensor – Model 24GB
Upgrade your automatic door system with the LIHTNE 24GB Universal Microwave Radar Sensor. Operating at a precise 24.125GHz emission frequency, this advanced motion detector reliably identifies movement and triggers your automatic door mechanism with speed and accuracy. Its wide detection range, robust build, and broad power supply compatibility make it an ideal choice for commercial entrances, retail storefronts, office lobbies, and more.
Made in Mainland China.
Key Features
- 24.125GHz Microwave Technology: Uses microwave/microwave processor principles for precise, reliable motion detection — unaffected by temperature changes, light conditions, or air currents.
- Wide Detection Coverage: At a mounting height of 2.2m, detects a zone of 4m (Width) × 2m (Depth) — ideal for standard doorway applications.
- Flexible Mounting: Maximum mounting height of 4 meters with an adjustable inclination of 15°–45° to suit your installation environment.
- Broad Power Compatibility: Accepts 12V–24V AC (±10%) and 12V–30V DC, with a low power consumption of less than 2W — energy-efficient and easy to integrate.
- Relay Output: Dry contact relay output supports up to 42V AC / 60V DC contact voltage and up to 1A contact current, ensuring compatibility with a wide range of door controllers.
- Durable & Weather-Resistant: IP52 protection rating and ABS plastic housing provide reliable operation across a temperature range of -20°C to +55°C.
- Ready to Install: Comes with a 2.5-meter connecting cable for convenient, flexible installation.
- Low Transmit Power: Emits less than 20dBm EIRP with an emission frequency density under 5mW/㎡ — safe and regulation-friendly.
Full Technical Specifications
| Technical Principle | Microwave / Microwave Processor |
| Emission Frequency | 24.125 GHz |
| Transmit Power | <20dBm EIRP |
| Emission Frequency Density | <5mW/㎡ |
| Max Mounting Height | 4 m |
| Inclination | 15°–45° |
| Detection Range (at 2.2m height) | 4m (W) × 2m (D) |
| Detection Mode | Motion |
| Min Detection Speed | 5 cm/s (along longitudinal axis) |
| Power Supply Voltage | 12V–24V AC ±10%; 12V–30V DC |
| Power Frequency | 50–60 Hz |
| Power Consumption | <2W (VA) |
| Relay Output | Dry contact (no initial potential) |
| Max Contact Voltage | 42V AC / 60V DC |
| Max Contact Current | 1A (resistive) |
| Max Switching Power | 30W (DC) / 60VA (AC) |
| Operating Temperature | -20°C to +55°C |
| Protection Level | IP52 |
| Housing Material | ABS Plastic |
| Connecting Cable Length | 2.5 m |
| Model Number | 24GB |
Why Choose Microwave Radar Over PIR?
Unlike passive infrared (PIR) sensors, microwave radar sensors are not affected by temperature fluctuations, drafts, or direct sunlight. They can detect movement through non-metallic materials and offer more consistent performance in high-traffic commercial environments. Learn more about radar-based sensing technology from the National Institute of Standards and Technology (NIST).
Ideal Applications
- Automatic sliding doors in retail stores, supermarkets, and malls
- Office building and hotel lobby entrance systems
- Hospital and clinic automatic door installations
- Industrial access control and automation gates
- Any access point requiring hands-free, touchless entry
Frequently Asked Questions
Q: What type of doors is this 24GHz microwave radar sensor compatible with?
A: This universal microwave radar motion sensor is designed for use with most automatic door systems, including sliding doors, swing doors, and access-controlled gates. Its relay output is compatible with a wide range of door controllers that accept dry contact trigger signals.
Q: Can this radar sensor be used outdoors?
A: The LIHTNE 24GB carries an IP52 protection rating, which provides protection against dust and light water splashes. It is suitable for covered outdoor or semi-outdoor installations (e.g., under a canopy or overhang). It is not recommended for direct, continuous rain exposure.
Q: How does the 24GHz microwave radar sensor differ from a standard PIR motion sensor?
A: Microwave radar sensors actively emit 24.125GHz radio waves and measure the reflected signal to detect movement. This makes them significantly more reliable than PIR sensors in environments with temperature variation, airflow, or bright sunlight, as they are immune to those environmental factors.
Q: What is the minimum detectable movement speed?
A: The sensor can detect movement as slow as 5 cm/s along the longitudinal axis of the sensor, making it highly sensitive to even slow-moving individuals approaching a doorway.