Gravity - microwave sensor for motion detection V2.0 - DFRobot SEN0192

The sensor uses the Doppler effect to detect the motion of objects. By using microwaves instead of infrared, it is possible to detect objects that reflect waves in the micro range. In addition, the sensor does not depend on the ambient temperature and also detects inanimate objects.

Microwave detection has numerous advantages over other methods:

• Non-contact detection
• The reading does not depend on temperature, humidity, noise, air, dust or light - suitable for harsh environments
• High resistance to radio interference
• Signal harmless to humans
• Wide range and high speed of detection
• Detects the movement of inanimate objects

The sensor is equipped with a digital output, which should be connected to any input of the microcontroller.

The product is compatible with Arduino

Refer to the user guide for an example code and detailed information.

Example of sensor connection. You can download the library for Arduino from the manufacturer's website.

• Supply voltage: 5 V +/- 0.25 V
• Operating current:
  • Typical: 37 mA
  • Maximum: 60 mA
• Output signal: digital
• Emission parameters:
  • Detection distance: 2 to 16 m
  • Emission frequency: 10.525 GHz
  • Frequency setting precision: 3 MHz
  • Power output: 13 dBm EIRP
  • Harmonic emission: < -10 dBm
  • Average current: 2 mA
  • Pulse Width: 5 μs
  • Load cycle: 1%
• Receiving parameters:
  • Sensitivity: 3 Hz to 80 Hz
  • Bandwidth: -86 dBm
  • Bandwidth from 3 Hz to 80 Hz: 10 μV
  • Antenna gain: 8 dBi
  • 3 dB vertical beamwidth: 36 degrees
  • Horizontal beamwidth: 72 degrees

• PCB dimensions: 63 x 48.5 mm

The board is compatible with the DFRobot IO Expansion Shield connectors for Arduino V7.1.

• Microwave sensor for motion detection
• Connection cable

DFRobot's Gravity series microwave motion sensor can detect human motion and other physical objects by emitting electromagnetic waves in the radio frequency range. The sensor can operate in a wide range of temperatures, including industrial environments with a high level of pollution. The method of detecting living organisms and inanimate objects using microwave emission is reliable and resistant to external interference. Moreover, the microwave detector is safe for living organisms, i.e. humans and animals.

The DFRobot Gravity Series microwave motion detector is an excellent alternative to classic infrared sensors. Unlike IR sensors, microwave sensors have a much higher sensitivity - they are able to detect the presence of people even behind a wall, even when there is no one in the direct field of view of the sensor. Another important practical advantage of such sensors is their high resistance to extreme weather conditions - from bitterly cold temperatures to tropical heat.

• DFRobot SEN0192 manufacturer's website
• WikiDoc user guide
• Schematics of the module
• Arduino library