10 Best Smart Humidity Sensor 2025 in the United States

The ThermoPro Hygrometer Thermometer TP350 is a versatile and reliable choice for monitoring indoor humidity and temperature. Its high accuracy (+/-0.9°F and +/-2% RH) ensures precise readings, making it suitable for critical environments such as baby rooms, musical instrument rooms, and cigar rooms. The device has a broad range of 260 feet via Bluetooth, allowing you to monitor conditions from a distance without obstructions, which is excellent for larger homes or greenhouses.

The ThermoPro app enhances usability by offering easy access to data without requiring user registration, protecting your privacy. This device also stands out with its 2-year data storage and export feature, allowing you to analyze long-term trends and make informed decisions about your indoor environment. The backlit display and comfort indicator provide clear and accessible readings, even in low-light conditions, adding to its practicality.

It operates on two AAA batteries (included), which are easy to replace but may need regular attention if used extensively. A potential downside is the limitation to Bluetooth connectivity only, lacking integration with Wi-Fi or smart home systems, which could be a drawback for those seeking a more interconnected smart home environment. While it offers alerts and notifications through the app, more advanced features like voice assistant compatibility are absent. In summary, the ThermoPro TP350 is an excellent choice for users seeking an accurate, easy-to-use humidity and temperature monitoring device with robust data logging capabilities, though it may not satisfy users looking for more advanced smart home integrations.

The Govee Indoor Hygrometer Thermometer is a solid choice for anyone looking to monitor humidity and temperature in various indoor settings, such as homes, greenhouses, or even nurseries. One of its standout features is the large 3-inch LCD screen that makes it easy to read the displayed data, including temperature and humidity levels, as well as comfort indicators. Its accuracy is commendable, with temperature readings accurate to ±0.54°F and humidity to ±3%RH, ensuring you get reliable information. Additionally, the fast refresh rate of every 2 seconds means you won't miss any significant changes.

The Bluetooth connectivity allows for a convenient range of up to 196 feet, enabling timely notifications if the temperature or humidity strays from preset levels. The accompanying Govee Home app enhances user experience by allowing for easy setup and data logging. With 20 days of online data storage and the ability to export two years of data in CSV format, users can track trends over time and make informed decisions about their environment.

However, there are a few drawbacks. The reliance on AAA batteries may require frequent replacements, which can be inconvenient for some users. Additionally, while the app notifications are helpful, those who prefer a wired connection or more robust home automation integration might find the Bluetooth feature limiting. Moreover, the device is tabletop-only, which could restrict placement options for some users.

The ecobee Smart Thermostat Premium is a versatile device that combines the functionalities of a smart thermostat and a smart humidity sensor. It features high accuracy in temperature control, which helps maintain comfort in your home. The included SmartSensor improves temperature regulation by addressing hot or cold spots, enhancing comfort. Connectivity options are robust, with compatibility for Siri, Alexa, and Google Assistant, allowing seamless integration into various smart home ecosystems.

The device supports Wi-Fi and Bluetooth for efficient communication and control via app or voice commands. It uses a lithium-ion battery, ensuring reliability and longevity, though it requires wired installation, which might be a bit cumbersome for some users. The thermostat's built-in air quality monitor and smoke alarm detection provide valuable insights and alerts, making it a comprehensive home monitoring hub.

Notifications are prompt, helping you stay informed about potential issues like poor air quality or sudden temperature drops. However, to access some advanced features like security alerts and automatic pauses in heating/cooling when a door/window is left open, additional sensors and a subscription to the ecobee Smart Security plan are required. While the device excels in integration, connectivity, and alerts, its primary focus remains on temperature control and air quality monitoring rather than being a dedicated humidity sensor.