The camera-free FP400 uses 60GHz radar, AI-assisted detection and configurable zones to bring more precise automation to busy rooms , but it needs permanent USB-C power.
Aqara has extended its presence-sensor range with a model that is aimed less at convenience and more at precision. The Spatial Multi-Sensor FP400 uses 60GHz mmWave radar and AI-assisted sensing to track movement and occupancy without a camera, and the company says it can monitor up to 10 people at once while dividing a room into as many as eight configurable zones. The result is a device designed for more exact automation than a conventional motion sensor can deliver, particularly in busy or irregularly shaped spaces.
That level of capability comes with some practical trade-offs. The FP400 needs permanent USB-C power, which immediately narrows placement options compared with newer battery-powered sensors in Aqara’s own line-up. Aqara includes a cable but not a power adapter, so installation depends on finding a location that is both useful for sensing and convenient for cabling. The sensor can be wall, corner or ceiling mounted, with Aqara recommending a mounting height of 1.5 to 2 metres for wall and corner use, and 3 to 4 metres for ceiling placement.
Connectivity is another area where the FP400 offers flexibility, but not all routes are equal. Aqara says the device supports both Zigbee and Matter over Thread, allowing it to work with a wider range of smart home systems. In practice, however, the richer feature set is available when the sensor is paired through an Aqara hub over Zigbee, after which it can be shared to other platforms via Matter. Aqara’s own documentation also notes that the sensor can be configured with up to eight zones in Aqara Life, while third-party Matter ecosystems are supported through the hub or pairing workflow.
The software setup is designed to make a technically ambitious product easier to deploy. The company’s app walks users through positioning the sensor and defining the detection area by having them trace the room boundary. That process is intended to confine detection to the correct space and reduce false positives. Aqara also offers an AI tuning step that is meant to filter out interference from household movement and other environmental noise. The sensor’s AI-enhanced person detection is specifically designed to improve resistance to pets and robotic vacuum cleaners, which is important for households where standard presence detection can be unreliable.
The most notable feature is the way the FP400 turns a single sensor into a more granular automation tool. Each zone can function as a separate trigger in supported apps, effectively allowing one device to behave like several motion sensors. That makes it possible to switch on a reading lamp when someone settles in a chair, or to control heating and ventilation based on where a person is in the room rather than simply whether they have entered it. Aqara says the sensor can also distinguish direction of movement and identify different kinds of approach or departure, adding another layer of context for automations.
The practical value of that precision will depend on the space. In a small office, the reviewer found the zone system useful but limited by room size; in a larger living area, the feature set would have far more room to matter. Aqara positions the FP400 as a premium presence sensor for users who need detailed spatial data, and the pricing reflects that. At $79.99 in the US and €79.99 in Europe, it sits above simpler alternatives, and its constant power requirement means it is best suited to fixed installations rather than flexible placement. For households with demanding automation needs, it is a strong and unusually capable option. For everyone else, a cheaper sensor will probably be easier to justify.
Disclaimer: This content is intended for informational purposes only. Readers are advised to exercise their own judgement, conduct due diligence, or consult a qualified expert before acting on any information provided.
