Eufy vs Nuki Motion Sensor

Eufy vs Nuki Motion Sensor: Which One Should You Buy?

Both the Eufy and Nuki motion sensors are designed to detect movement and trigger smart home actions, but they serve different ecosystems. The Eufy sensor is part of the broader Eufy Security lineup, which includes cameras, doorbells, and alarms. The Nuki sensor is built primarily for Nuki smart lock users who want to automate door actions based on motion.

Owner reviews on Amazon and other retailers show that the Eufy sensor is praised for its reliability and long battery life, while the Nuki sensor is valued for its tight integration with the Nuki app and lock. Neither sensor works without a hub, so your existing smart home setup will heavily influence your choice.

Detection Range and Angle

The Eufy motion sensor offers a 120-degree detection angle and a range of up to 9 meters, which is slightly wider and longer than the Nuki sensor's 110-degree angle and 8-meter range. In practice, this means the Eufy sensor can cover a larger area, making it more suitable for open-plan rooms or hallways.

Both sensors use passive infrared (PIR) technology, so they detect body heat and movement. The Eufy sensor also includes pet immunity up to 23 kg, which is higher than Nuki's 15 kg limit. If you have larger pets, the Eufy sensor will produce fewer false alarms.

Battery Life and Power

Battery life is a key differentiator. The Eufy motion sensor claims up to 2 years of use on a single CR123A battery, while the Nuki sensor lasts around 1 year. Owner reports on forums confirm that the Eufy sensor consistently meets or exceeds its battery estimate, while the Nuki sensor sometimes falls short, especially in high-traffic areas.

Both sensors use standard CR123A batteries, which are easy to replace. Neither sensor offers a wired power option, so battery life is an important consideration for long-term maintenance.

Smart Home Integration and Ecosystem

The Eufy motion sensor works exclusively with the Eufy Security app and requires a HomeBase 2 hub. It supports Apple HomeKit, Amazon Alexa, and Google Assistant, allowing you to trigger lights, cameras, and alarms. The sensor can also be used to arm or disarm your Eufy alarm system based on motion.

The Nuki motion sensor integrates with the Nuki smart lock ecosystem. It requires a Nuki Bridge or a compatible Nuki Smart Lock to connect to Wi-Fi. It supports Apple HomeKit, Alexa, Google Assistant, and IFTTT, giving it slightly more flexibility for advanced automations. If you already own a Nuki lock, the sensor can trigger the lock to auto-unlock when you approach, which is a unique feature not available with Eufy.

Build Quality and Weather Resistance

The Eufy motion sensor has an IP65 rating, meaning it is dust-tight and protected against low-pressure water jets. This makes it suitable for outdoor use under eaves or covered porches. The Nuki sensor has an IP44 rating, which protects against splashes but not powerful jets. It is best used indoors or in sheltered outdoor locations.

Both sensors are made from white plastic and have a compact, unobtrusive design. The Eufy sensor includes a mounting bracket and adhesive tape, while the Nuki sensor comes with screws and wall plugs. Owner reviews note that the Eufy sensor feels slightly more robust, but both are adequate for typical home use.

What to Check Before Buying

Before choosing between the Eufy and Nuki motion sensors, check your existing smart home ecosystem. If you already have a Eufy HomeBase or Eufy cameras, the Eufy sensor is the obvious choice. If you own a Nuki smart lock, the Nuki sensor adds valuable automation capabilities.

Also consider the installation location. For outdoor or semi-outdoor use, the Eufy sensor's IP65 rating is a clear advantage. For indoor use, both sensors perform similarly. Finally, think about battery maintenance. The Eufy sensor's longer battery life means fewer replacements over time.

Mistakes to Avoid

A common mistake is buying the Nuki motion sensor without a Nuki Bridge or compatible lock. The sensor cannot connect to Wi-Fi directly and requires a hub to function. Similarly, the Eufy sensor is useless without a HomeBase 2, so ensure you have the necessary hub before purchasing.

Another mistake is ignoring pet immunity settings. If you have pets, make sure to adjust the sensitivity or enable pet immunity to avoid false alarms. The Eufy sensor offers a higher pet weight threshold, which is better for homes with larger dogs.