Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.
It checks today's price at every store, compares the alternatives and answers in about a minute.
The HLK-LD2410C is a 24GHz mmWave radar module that detects human presence and motion, not just movement, so it keeps reporting a person who is sitting still. Each unit covers up to 6 meters at roughly ±60 degrees and runs on 5-12 V. Setup and tuning go through Bluetooth or a serial port, with multi-level parameters for range, sensitivity and detection zones. At 16x22 mm it fits behind a ceiling panel or inside a small enclosure. Compared with passive infrared sensors, it holds presence through stillness and heat, but it costs more per unit and needs configuration rather than simple wiring. It suits makers and smart-home tinkerers building occupancy automation, not plug-and-play buyers.
Availability unknown
As an Amazon Associate, Deal.ai earns from qualifying purchases.
Availability unknown
Store links may earn us a commission.
Lowest price we've seen: $22.99 on Nov 14 at Amazon; highest $63.95 on Oct 31. Tracked across 2 stores since Oct 31.
Owner feedback on the LD2410 family is generally positive among makers: presence detection through stillness works well once tuned, and Bluetooth setup is convenient. Complaints center on false triggers from moving objects and the learning curve of the parameter tool.
This pack contains four Hi-Link HLK-LD2410C radar sensor modules. They use 24GHz mmWave technology to detect human presence and motion.
Each module senses at distances up to 6 meters, with a detection angle of up to ±60 degrees. Parameters can be adjusted at multiple levels over Bluetooth or a serial port.
Each module has a small 16x22 mm package and can be mounted on a ceiling or a wall. It runs on a 5-12 V power supply and works on the 24GHz ISM band. It can be used for occupancy sensing, smart home security and DIY automation projects, and it integrates with microcontrollers and hubs.
