The C4001 Millimeter-Wave Presence Sensor is a high-performance 24GHz radar module that enables non-contact detection of both motion and stillness within a broad range. With a presence detection range of up to 16 meters and a motion/distance detection range of up to 25 meters, it’s ideal for environmental monitoring, smart automation, and real-time tracking applications.
Key Features
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Human Presence Detection: Detects static and moving humans up to 16 meters
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Motion & Distance Measurement: Detects objects up to 25 meters
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Velocity Detection: Detects motion speeds from 0.1 to 10 m/s
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24GHz FMCW radar technology for high-resolution, real-time sensing
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Strong anti-interference: Unaffected by temperature, light, dust, noise, or humidity
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Supports I/O level output and UART communication
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Compact form factor: Easy to integrate into smart systems
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Multiple installation methods: Top, bottom, horizontal, or angled
How It Works
The C4001 uses FMCW (Frequency Modulated Continuous Wave) radar to transmit a continuous signal and receive reflections from surrounding objects. By analyzing frequency differences and the Doppler effect, the sensor measures both distance and velocity with high precision. Compared to traditional pulse radar or infrared sensors, FMCW radar provides continuous, real-time tracking and is more immune to environmental noise.
Applications
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Smart human presence detection
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Distance and motion tracking systems
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Environmental monitoring solutions
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Industrial automation
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Security and surveillance systems
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Smart lighting and HVAC control
Specifications
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Operating Voltage: 3.3V / 5V
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Detection Range (Human Presence): Up to 16 meters
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Detection Range (Motion/Distance): 1.2 – 25 meters
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Velocity Detection Range: 0.1 – 10 m/s
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Modulation Mode: FMCW
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Beam Angle: 100° (horizontal) × 40° (vertical)
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Operating Frequency: 24GHz
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Communication Interface: UART (Baud rate: 9600), I/O control
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Operating Temperature: -40°C to +85°C
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Dimensions: 26 × 30 mm
Package Includes
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1 × C4001 24GHz Millimeter-Wave Presence Sensor (25m)
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5-pin header