HLKLD2420 24 GHz Millimetre Wave Human Presence Sensor Module Overview A compact 24 GHz millimetre wave sensor module for reliable human presence and micro motion detection. Designed for integration into lighting control and automation systems, the HLKLD2420 detects even small or slow movements to trigger lights and occupancy logic without depending on visible light. Key benefits Accurate presence detection: 24 GHz millimetre wave sensing detects micro motion and small movements, improving responsiveness for stationary or slowmoving occupants. Reliable in low light and occluded conditions: nonvisual sensing reduces missed triggers in darkness or crowded fixtures where optical sensors struggle. Easy integration: compact module form factor fits into lighting fixtures, switch modules, or embedded controllers to add presence sensing capability. Reduces energy waste: enables automatic light control based on actual presence, supporting more efficient lighting operation. Flexible deployment: suitable for retrofit and installations where discreet, noncontact sensing is required. Main functions and attributes Function: human presence detection and micro motion sensing for light control applications. Operating frequency: 24 GHz millimetre wave band for fine motion sensitivity. Module type: compact PCB module designed for integration into lighting and automation hardware. Material and construction: printed circuit board with RF components and sensor electronics, suitable for standard electrical enclosures and fixtures. Performance characteristics: tuned for indoor occupancy detection and micromotion responsiveness to support reliable light switching and presencebased logic. Compatibility and integration Intended for use with lighting control systems, microcontrollers, smart switches, and building automation controllers. Module output can be interfaced with typical control inputs to trigger relays, dimmers, or digital control logic. Suitable for embedded applications where space is limited and precise presence sensing is required. Practical use scenarios Corridor and stairwell lighting: automatically switch or dim corridor lights when occupants are present to improve safety and save energy. Conference rooms and offices: detect occupancy for lighting and HVAC control when motion is minimal or occupants are seated. Undercabinet and task lighting: trigger localized lights when someone is working in a specific area, avoiding constant on time. Installation notes Designed for integration into fixtures or control modules. Ensure compatible electrical interface and mounting clearance for RF performance. Final system behavior depends on the host controller and wiring. Calibration and placement affect detection coverage and sensitivity. Model information Model designation: HLKLD2420. Function summary: 24 GHz millimetre wave human presence sensor module for micro motion detection and light control.