The Lvqing QZX327 sensor detects tiny human motions using ultra‑wideband radar and provides RS485 output for smart devices.
The QZX327 human micro‑motion sensor uses ultra‑wideband radar and biomedical engineering to detect body presence, breathing and subtle movements. It is suited for smart toilets, robots, offices, conference rooms, restrooms and hospitals.
The manual details electrical parameters, communication settings, device functions, installation, wiring, remote‑control adjustments and safety precautions for reliable operation. This manual is written in Chinese.
| Input Voltage | DC 8‑12 V |
|---|---|
| Working Current | < 90 mA |
| Detection Angle (FOV) | 85° × 85° |
| Output Mode | RS485 and passive switch signal |
| Product Size | 75 mm × 25 mm |
| Detection Distance (Dynamic) | < 5 m |
| Detection Distance (Static) | < 2 m |
| Operating Temperature | -40 °C to 85 °C |
| Wiring Cable | 4 × 0.5 mm²‑L180 mm |
| Installation Method | Ceiling mount |
| Communication Interface | RS485 |
| Supported Protocols | ASCII / MODBUS RTU |
| Baud Rate Options | 9600, 8, n, 1 |
| Electrical Isolation | 1000 VDC |
| Wave Rate Options | 2400‑38400 bps |
Press the sensitivity key, then press a number 1‑9; level 1 is least sensitive, level 9 is most sensitive (default 9).
Press and hold the “C” key for five consecutive presses to restore factory settings.
The sensor detects dynamic body movement up to 5 m and static breathing motion up to 2 m.
It supports RS485 with ASCII and MODBUS RTU protocols.