The Gravity: 10.525GHz Microwave Motion Sensor is a high-sensitivity motion detection module based on the Doppler radar principle, ideal for detecting moving objects without physical contact. Unlike traditional infrared (IR) sensors, this microwave sensor can detect various microwave-reflective materials and is unaffected by environmental conditions like temperature, humidity, dust, or light.
This sensor is widely used in industrial, transportation, and civil applications, including vehicle speed detection, automatic doors, liquid level sensing, security systems, production line monitoring, and reverse parking systems.
Key Features
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Non-contact motion detection using 10.525GHz microwave technology
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Immune to temperature, dust, noise, light, and humidity — suitable for harsh environments
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Strong resistance to radio frequency interference
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Low power microwave emission, safe for human exposure
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Wide detection range (2–16 meters) with adjustable sensitivity
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Supports detection of non-living objects
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Gravity 3-pin digital interface, plug-and-play with Arduino
Applications
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Smart home motion detection systems
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Industrial automation
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Liquid level monitoring
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Vehicle detection and traffic systems
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Production line object counting
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Enhanced sensor fusion for more accurate motion detection
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Security and safety systems
Projects
Specifications
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Working Voltage: 5V ± 0.25V
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Working Current (CW): Max 60mA, Typ. 37mA
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Interface: Gravity 3-Pin Digital
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Module Size: 48.5mm x 63mm
Emission Parameters
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Detection Distance: 2–16 meters (adjustable)
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Emission Frequency: 10.525GHz
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Frequency Accuracy: ±3MHz
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Output Power: ≥13dBm EIRP
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Harmonic Emission: < -10dBm
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Average Current (5% DC): Typ. 2mA
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Minimum Pulse Width: 5μs
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Minimum Load Cycle: 1%
Reception Parameters
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Sensitivity (S/N ≥ 10dB): 3Hz to 80Hz
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Bandwidth: -86dBm
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3Hz–80Hz Clutter: 10μV
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Antenna Gain: 8dBi
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Vertical Beam Width: 36°
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Horizontal Beam Width: 72°
Hardware Compatibility
This sensor is compatible with common development boards such as the DFRduino Uno R3 and works seamlessly with the Gravity IO expansion shield. It can also be used alongside other sensors such as ultrasonic sensors or servos for building interactive or responsive systems.
Shipping List
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Microwave Sensor Module x1
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Digital Sensor Cable x1