Radar Motion Sensor HW-MS03
This sensor module has been designed as an alternative to the common PIR motion sensors widely used in burglar alarms and security lights. Like the PIR sensor, this sensor also detects only movements within its detection range. But instead of sniffing the black body radiation from a moving person, this sensor uses a “microwave Doppler radar” technique to detect moving objects. It has a sensitivity range of ~7 meters. When triggered, its TTL-level output (OUT) pin will switch from LOW (0 V) to HIGH (3.3 V) for a finite time (2 to 3 s) before returning to its idle (LOW) state.
- Independent of temperature, humidity, airflow, dust, noise, light and dark, anti-interference, etc.
- The transceiver module is a field-shaped signal with a wide coverage and no blind spots.
Output category: digital sensor
- Working principle: vibration sensor
- Sensor type: 2.4GHz to 5.8GHz radar sensor
Supply Voltage: 4–28 VDC (tested with 5 V at my lab)
Operating frequency: ~3.2 GHz (observed by me at my lab)
Transmit power: 20 mW (typical)/30 mW (max)
Sensing Distance: 5–7 m (>3 m measured at my lab)
CDS — Sensor disable input (low = disable)
VIN — 4- to 28-V DC supply input
OUT — HIGH (3.3 V) motion detected/LOW (0 V) idle
GND — Ground/0 V
3V3 — Regulated DC output (100 mA max)
1 X Radar Motion Sensor HW-MS03