C4001 24GHz Millimeter-Wave Presence Sensor (25 m Range)

The C4001 Millimeter-Wave Presence Sensor is a high-precision FMCW radar module designed for reliable human presence, motion, and distance detection. Operating at 24 GHz, the C4001 delivers exceptional performance in real-world environments where traditional infrared or ultrasonic sensors often fall short.

With a 100° wide horizontal field of view, 16-meter presence detection, and an extended 25-meter motion and ranging capability, this compact radar module is ideal for security systems, smart home automation, environmental monitoring, and industrial sensing applications.

Engineered with robust anti-interference capabilities, the C4001 performs flawlessly in challenging conditions including dust, fog, low light, temperature fluctuations, and noise. Unlike PIR sensors, it can detect both static and movingtargets, ensuring dependable occupancy detection—even when someone is sitting or sleeping.

Powered by FMCW (Frequency Modulated Continuous Wave) radar technology, the C4001 enables real-time measurement of distance, velocity, and motion direction, offering superior resolution and responsiveness. With UART and I/O interfaces, integration with Arduino, ESPHome, Home Assistant, and industrial systems is straightforward.

Key Features

• Human presence detection up to 16 meters

• Motion and distance detection up to 25 meters

• Velocity detection: 0.1–10 m/s

• Wide 100° × 40° detection beam

• Strong environmental resistance (dust, fog, heat, cold, light)

• FMCW radar for high-accuracy distance and speed measurement

• Supports I/O control and UART communication (9600 baud)

• Compact size (26 × 30 mm), easy to embed

• Works with 3.3 V or 5 V systems

Ideal Applications

• Human presence & occupancy monitoring

• Smart home automation (e.g., lights, HVAC, security)

• Environmental sensing and motion tracking

• Industrial automation & robotics

• Real-time distance and speed measurement

Package Includes

• 1 × C4001 24GHz mmWave Presence Sensor (25 m)

• 1 × 15-pin header