HLK-LD2412 ±75° Human Presence Detection Radar Module is a highly sensitive 24GHz radar sensor for human presence detection. It operates on the principle of FMCW frequency modulation continuous wave to detect human targets. With advanced radar signal processing and precise sensing algorithms, it achieves high sensitivity detection of both moving and stationary humans. The HLK-LD2412 ±75° Human Presence Detection Radar Module is primarily used in indoor scenarios. It can detect human body movement or micro-movement in the perception area and output real-time results. It has a maximum sensing distance of 9 meters and a distance resolution of 0.75 meters. It also provides a visual configuration tool for customizing sensing distance range, sensitivity in different intervals, and unmanned delay time. The HLK-LD2412 ±75° Module supports GPIO and UART outputs, offering plug-and-play convenience. It can be flexibly applied to various smart home sensor scenarios and IoT terminal products, enhancing system functionality and intelligence. Features Plug-and-play, simple assembly method Maximum sensing distance up to 9 meters, configurable detection ranges Wide detection angle: ±75° coverage Multi-level intelligent parameter tuning for scene adaptation Visual debugging and configuration tools Compact design, supports ceiling and wall mounting 24GHz ISM band, certified by FCC and CE Highly cost-effective radar solution Specifications Frequency: 24G–24.25GHz Modulation Type: FMCW Detection Distance: Resolution 0.75m, adjustable 0.75m–9m Detection Angle: ±75° Power Supply: 3.3V or 5V (>200mA) Current: ~90mA (Typ.) Output Serial Port Level: 3.3V Frequency Sweep Bandwidth: 250MHz (CE/FCC compliant) Operating Temperature: -40°C to +85°C Dimensions: 11mm × 28mm Package Type: Default with pins Pin Definition Pin Symbol Name Function OUT Target Status Output Detects presence: High level; No presence: Low level. Configurable via commands. TX Serial Port Tx Tx pin of serial port RX Serial Port Rx Rx pin of serial port +5V 5V Power Input Power input: 5V; selectable 5V or 3.3V 3V3 3.3V Power Input Power input: 3.3V; selectable 5V or 3.3V GND Ground Power ground G Ground Power ground Application Human sensor light control Advertising displays Smart home appliances Intelligent security systems Packing List HLK-LD2412 1 × HLK-LD2412 Radar Module HLK-Test-Kit 1 × Test Kit w/o Module FAQ Q1: What is the maximum detection range? A1: The HLK-LD2412 supports up to 9 meters with 0.75m resolution. Q2: Can it detect micro-movements? A2: Yes, it can detect micro-movements of stationary humans. Q3: Is it certified for global use? A3: Yes, it complies with FCC and CE spectrum regulations. Q4: What output interfaces are supported? A4: It supports GPIO and UART outputs. Q5: Can it be installed on ceilings? A5: Yes, it supports ceiling and wall mounting. Download HLK-2412 Tool Install
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