It's time to stop using motion sensors in your home – use these new devices instead

You may not realise it, but there’s a good chance you’ve already run into the frustrating downsides of PIR motion sensors. It usually involves waving your arms around just to get the lights to switch on, or watching them turn off whilst you’re still in the room. Although PIR sensors have long been the default choice for detecting activity in smart homes, their inability to register someone quietly working or simply relaxing can quickly become a nuisance.

However, before it all turns into doom and gloom, it’s worth noting that a new generation of sensors is emerging to address these issues. Instead of relying on heat signatures, mmWave sensors use high-frequency radio waves to pick up even the tiniest movements, like breathing or subtle shifts in posture. In everyday terms, this means they can tell you’re still in the room even when you’re sitting perfectly still.

However, beyond the tech itself, the real benefit of making the switch lies in how much smoother your smart home will become. Instead of relying on rough guesses based on big movements, these new sensors help contribute to a system that’s aware of your presence, which is essentially what owning a smart home is all about.

That said, the benefits don’t stop there. There’s also a real advantage when it comes to energy efficiency, as accurate presence detection means your home can stop wasting power on empty rooms. That's because mmWave sensors can distinguish between a real person and common false triggers – such as pets or the best robot vacuums – so they only activate when they need to. Over time, that can add up to noticeable savings.

Another reason we like mmWave sensors at T3 is that, with smart home systems increasingly moving toward Matter compatibility, newer sensors help keep your setup flexible and future-proof. This ensures your home can evolve and adapt alongside other devices, rather than being limited by older hardware.

Aqara is one of the brands leading the way with mmWave technology. Known for its lineup of impressive smart security gadgets, the brand has now launched the Presence Multi-Sensor FP300 – an mmWave sensor with up to two years of battery life. Whilst other brands have released mmWave sensors too, the FP300 stands out as a strong example of how this technology is becoming the new standard for accurate presence detection.

Upgrade your smart home with Aqara’s brand-new mmWave Presence Multi-Sensor FP300: £49.99 at amzn.to

The Aqara Presence Multi-Sensor FP300 is a compact, battery-powered mmWave presence sensor offering up to two years of battery life. Combining 60GHz mmWave, PIR, light, temperature and humidity sensors, it accurately detects even the smallest movements, like breathing or subtle posture shifts, across a 120° field of view and from up to 6 metres away. AI-powered learning reduces false triggers from pets, robot vacuums or environmental changes, and Thread and Zigbee connectivity make it Matter-compatible.

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