Xiaomi announced the Xiaomi Door and Window Sensor 3, featuring a three-year battery life on a single CR2032 button cell—triple the lifespan of its predecessor—svetandroida.cz reported. The device monitors home entry points through a new tunnel magnetoresistive sensor rather than traditional magnetic field coils.
Tunnel Magnetoresistive Sensor Technology Replaces Hall Probes
The third-generation hardware swaps out the older Hall effect sensor used in the Xiaomi Door and Window Sensor 2 for a tunnel magnetoresistive sensor. The previous model identified openings via a Hall probe, which is a standard magnetic field sensor. According to svetandroida.cz, this modification increases response speed while lowering overall power consumption. The device maintains its compact body dimensions to fit narrow door frames, cabinets, or storage boxes. Installation alignment guides remain marked directly on the outer casing to prevent misalignment errors during setup.
Xiaomi Launches Crowdfunding Campaign in China
Xiaomi scheduled the initial product rollout for October 12 in China through a crowdfunding campaign priced at 44 yuan, which converts to approximately 140 Czech crowns, svetandroida.cz reported. Retail pricing will increase to 49 yuan, or about 155 crowns, after the campaign concludes. Official distribution timelines for the Czech market remain unannounced. However, prior iterations sell domestically through retailers such as Alza.cz, where the second-generation model retails for roughly 300 crowns.
Remote Monitoring Requires Bluetooth Mesh Gateway
Remote monitoring requires a Bluetooth Mesh gateway, which is built into select smart speakers and other hardware ecosystems. The Xiaomi Home app logs entry frequencies, daily opening counts, and door-state durations. Through Xiaomi HyperOS Connect, users can link the sensor to automated routines, such as activating lights when a door opens, disabling air conditioning during open windows, or triggering weather-related alerts. The third-generation sensor drops the ambient light detection feature included in the second model, requiring separate sensors for darkness-based automations.
Frequently Asked Questions About the Xiaomi Sensor 3
What powers the Xiaomi Door and Window Sensor 3?
A standard CR2032 coin cell battery powers the unit, delivering up to three years of operation under typical usage conditions, according to svetandroida.cz.
Does the new sensor retain the light sensor from the previous model?
No, svetandroida.cz reported that the built-in illumination sensor found in the second-generation device has been removed from the third-generation hardware.
What network protocol does the device use to communicate?
The sensor communicates via Bluetooth, requiring a Bluetooth Mesh gateway device for remote tracking outside the home network, as detailed by svetandroida.cz.
Corporate and Support Information
Xiaomi Technology Netherland B.V. is located at Prinses Beatrixlaan 582, 2595 BM, The Hague, The Netherlands. Czech users can access a service line for support or email service.cz@support.mi.com and call 00420 800 701 541 for technical questions. Batteries included with products carry a six-month lifespan because they are considered consumables.