Glass Door Sensor RD24-4S | Low Power ≤2W | Adjustable Tilt Angle
This RD24-4S Glass Door Sensor is a dedicated motion detection solution tailored for all framed, frameless and sliding glass door systems, with core highlights of ultra-low power consumption ≤2W and flexible adjustable tilt angle, making it the ideal matching component for commercial storefronts, office lobbies, retail spaces and modern residential glass entryways. Adopting stable 24.125GHz microwave Doppler technology, it delivers precise and responsive motion sensing exclusively calibrated for glass door usage, efficiently capturing pedestrian movement at ≥5cm/s and avoiding common false triggers from light refraction and glass surface reflections, ensuring smooth and consistent automation of glass doors without frequent misoperation or lag.
Its star feature is the controllable low power draw of ≤2W, enabling 24/7 uninterrupted operation with minimal energy loss, drastically cutting long-term power costs for glass door systems and meeting energy-efficient usage demands for both commercial and residential scenarios. The adjustable tilt angle design further elevates its practicality, allowing free fine-tuning to adapt to different glass door installation heights, passage widths and mounting positions, customizing the detection coverage to fit the exact pedestrian entry area perfectly without over-sensing irrelevant spaces. Slim and low-profile in structure, it mounts discreetly on glass door frames or adjacent walls, preserving the sleek, transparent aesthetic of glass door designs without disrupting overall decor. It supports 12-24V AC/DC wide voltage compatibility for universal power adaptation, features hassle-free quick installation with no complex debugging, and complies with international R&TTE and EMC standards for safe, reliable long-term use, standing out as a practical, energy-saving motion sensor dedicated to glass door automation.

Product Highlights
- 24.125GHz mainstream microwave frequency for stable motion detection (≥5cm/s)
- Wide detection field: 4m(W)*2m(D) at 2.2m mounting height
- Flexible angle adjustment: 0°~90° vertical / -30°~+30° lateral tilt
- Wide voltage supply: 12-24V AC/DC with low power consumption (≤2W)
- IP54 protection & -20℃~+55℃ working temperature for indoor/outdoor semi-enclosed use
- Easy installation & adjustment with compact size, sensitivity potentiometer, and clear LED status prompt
- Reliable output: 1.5s signal hold, 42V AC/DC max contact voltage, 1A resistive current
Technical Specifications
| Parameter |
Specification |
| Technology |
Microwave Doppler Radar |
| Transmitter Frequency |
24.125GHz |
| Transmitter Radiated Power |
<20 dBm EIRP |
| Transmitter Power Density |
≤5mW/cm |
| Maximum Mounting Height |
3m |
| Tilt Angles |
0°~90° vertical; -30°~+30° lateral |
| Detection Field (2.2m mounting) |
4m(W)*2m(D) |
| Detection Mode |
Motion detection |
| Minimum Detectable Speed |
5cm/s (sensor axis) |
| Supply Voltage |
12-24V AC ±10%; 12-24V DC +30% / -10% |
| Mains Frequency |
50-60Hz |
| Power Consumption |
≤2W(VA) |
| Output Mode |
Switch tube output |
| Signal Output Time |
1.5s hold |
| Max Contact Voltage |
42V AC/DC |
| Max Contact Current |
1A (resistive) |
| Max Switching Power |
30W(DC) / 60VA(AC) |
| Working Temperature Range |
-20℃ ~ +55℃ |
| Degree of Protection |
IP54 |
| Norm Conformity |
R&TTE 1999/5/EC; EMC 89/336/EEC |
| Material |
ABS |
| Housing Color |
Black/Silver |
| Dimensions (W*H*D) |
120mm*80mm*50mm |
| Net Weight |
0.215kg |
| Cable Length |
2.2m |
Installation & Adjustment Guide
The sensor's performance is closely related to correct installation and adjustment. Simple operation with no professional tools required:
Mounting Requirements
Avoid vibration positions, neon lamp proximity and sensor occlusion; do not touch internal electronic parts during installation.
Sensitivity Adjustment
Rotate the sensitivity potentiometer gently and slowly; the sensitivity value determines the size of the detection field (adjust to 1/2 or higher for short detection distance).
Angle Adjustment
Planar antenna lateral angle = detection field position; vertical angle = detection field depth; set microwave module angle to ≥45° for optimal detection.
Status Check
LED flashes after power-on (normal standby); LED lights up continuously when a moving target is detected (detection trigger).
Troubleshooting Guide
| Fault Phenomenon |
Probable Causes |
Corrective Action |
| Door does not open & LED no light |
Sensor power off |
Check wiring connection and power supply validity |
| Door opens/closes constantly |
Sensor detects door vibration/movement; interference source in detection range |
Fix the sensor firmly; increase tilt angle/reduce sensitivity; remove interference sources in the detection field |
| Detection distance is too close |
Low sensitivity; microwave module angle <45°; sensor blocked |
Adjust sensitivity potentiometer to 1/2 or higher; set module angle to ≥45°; remove occluding objects |
Application Scenarios
The RD24-4S is a multi-scenario motion detection sensor with high adaptability, primarily applicable to:
- Automatic Door Systems: Sliding doors, swing doors, glass induction doors (commercial buildings, shopping malls, office buildings)
- Security & Monitoring: Perimeter security detection, indoor human motion induction (residential, factory, warehouse)
- Industrial Automation: Conveyor belt motion detection, equipment start/stop induction (light industry production lines)
- Intelligent Building: Smart lighting induction, air conditioning induction (public areas such as corridors and elevators)
Core Technologies
Microwave Doppler Radar Sensor 24.125GHz Radar Sensor Automatic Door Motion Detector Wide Field Detection Sensor IP54 Motion Sensor