Commercial Door Sensor | 24.125GHz Microwave | Compact Size | IP54 Waterproof
This 24.125GHz Microwave Commercial Door Sensor is a professionally tailored motion detection accessory for all commercial entry doors, perfectly combining high-performance microwave sensing, ultra-compact size and IP54 waterproof protection, making it the ideal choice for busy commercial spaces like shopping malls, office buildings, retail stores and restaurant entrances. Adopting stable 24.125GHz microwave Doppler technology, it delivers accurate and fast motion detection for commercial door automation, efficiently capturing pedestrian movement at ≥5cm/s and avoiding false triggers from trivial environmental interference, ensuring smooth and stable operation of commercial swing doors, sliding doors and glass doors all day long.
Its compact and lightweight body is a core highlight for commercial installation, with a slim, space-saving profile that fits easily into narrow door frames, ceiling gaps or wall corners without protruding excessively, preserving the neat and professional appearance of commercial door facades and adapting to various commercial decoration styles with flexible concealed mounting. The IP54 waterproof and dustproof rating further enhances its practicality for commercial use, effectively resisting daily water splashes, oil mist, dust and humidity in public business areas, unlike ordinary sensors that are prone to damage in harsh commercial environments. It runs stably in a wide temperature range, supports 12-24V AC/DC wide voltage for universal commercial power adaptation, and features low power consumption for long-term uninterrupted operation. Compliant with international EMC and R&TTE standards, this compact, waterproof commercial door sensor balances small size, durable protection and reliable sensing, solving installation and environmental adaptation pain points for commercial door projects efficiently.

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