Product Overview
The X-Sense Wi-Fi Indoor Hygrometer (Model STH0A) is designed for precise monitoring of indoor temperature and humidity. It offers remote monitoring and app control capabilities, providing smart alerts and detailed historical data. This device requires the SBS50 Base Station for connectivity, which is not included with this 1-pack unit.

Image: Front view of the X-Sense Wi-Fi Indoor Hygrometer displaying temperature and humidity.
What's in the Box
- 1 x X-Sense Wi-Fi Indoor Hygrometer (Model STH0A)
- 2 x AA batteries (included)
- User Manual (PDF available online)
Note: The SBS50 Base Station is required for Wi-Fi connectivity and app control, but is sold separately.
Setup and Installation
- Insert Batteries: Open the battery compartment on the back of the hygrometer and insert the two AA batteries, ensuring correct polarity. The device will power on automatically.

Image: Close-up of a hand inserting AA batteries into the back of the hygrometer. The device is powered by 2 replaceable AA batteries with a 5-year lifespan.
- Connect Base Station (SBS50 - Sold Separately): Ensure your SBS50 Base Station is powered on and connected to your 2.4 GHz Wi-Fi network. The hygrometer communicates with the base station, which then connects to the X-Sense Home Security App.

Image: Aerial view diagram illustrating the long transmission range of up to 1,700 ft (500 m) between the hygrometer and the base station, covering an entire home.
- Download and Pair with X-Sense Home Security App: Download the X-Sense Home Security App from your device's app store. Follow the in-app instructions to add the SBS50 Base Station and then pair your STH0A hygrometer.

Image: A hand holding a smartphone showing a "High Temperature Alarm Triggered" notification from the X-Sense Home Security App, indicating smart alert capabilities.
- Placement: Place the hygrometer anywhere you need to monitor temperature and humidity. It features a stand for tabletop placement and a hanging slot for wall mounting.

Image: The hygrometer placed on a side table, illustrating customizable comfort levels for temperature and humidity settings within the app.
Setup Video Guide
Video: Official X-Sense video demonstrating the setup and features of the Smart Hygrometer Thermometer STH0A.
Operating Instructions
- Remote Monitoring: Use the X-Sense Home Security App to remotely monitor temperature and humidity 24/7 from anywhere. The app displays current readings, as well as maximum, minimum, and average values over time in a graph format.

Image: A person in a greenhouse viewing 24/7 monitoring data on a smartphone, including dew point, VPD, temperature graphs, and relative humidity graphs.
- Smart Alerts: Set custom temperature and humidity ranges within the app. Receive instant notifications on your phone and an audible alarm from the base station if readings go beyond your set limits. Low-battery warnings are also provided.
- Comfort Indicator: The hygrometer's 2.7-inch LCD displays clear comfort indicator icons, providing a quick visual reference of the current environment. These settings can be customized in the app.
- Alexa Compatibility: Control the thermo-hygrometer using Alexa voice commands. For example, ask, "Alexa, what's the thermo-hygrometer humidity?"

Image: A woman in a kitchen interacting with an Amazon Echo device, asking about the thermo-hygrometer humidity, with the hygrometer visible on the counter.
- Data Export: Export up to a year's worth of historical data from the app at no additional cost. This data can be used for trend analysis and environmental optimization.

Image: A laptop displaying exported data in a spreadsheet format, with a smartphone showing the data export option in the X-Sense app.
- Plant-Friendly Features: For plant enthusiasts, the app provides dew point and Vapor Pressure Deficit (VPD) data, crucial for optimizing growing conditions.
Maintenance
- Battery Replacement: The hygrometer uses 2 AA batteries, which are included and provide approximately 12 months of battery life. Replace batteries when a low-battery warning is received via the app.
- Cleaning: Wipe the device with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
Troubleshooting
- Connectivity Issues: Ensure the SBS50 Base Station is connected to a 2.4 GHz Wi-Fi network. This device is not compatible with 5.0 GHz Wi-Fi. Check the base station's connection status in the app.
- Inaccurate Readings: Allow the device to acclimate to its environment for a period after initial setup or relocation. Ensure the device's vents are not obstructed.
- Alerts Not Working: Verify that smart alerts are enabled in the X-Sense Home Security App and that notification permissions are granted for the app on your smartphone. Check the base station alarm volume settings.
- Further Assistance: Refer to the comprehensive User Manual (PDF) available on the product's Amazon page for detailed troubleshooting steps and FAQs.
Specifications
| Feature | Detail |
|---|---|
| Brand | X-Sense |
| Model Number | STH0A |
| Product Dimensions | 2.7"W x 3"H |
| Item Weight | 5.6 ounces |
| Temperature Accuracy | ±0.36°F (±0.2°C) between -4°F and 140°F (-20°C to 60°C) |
| Humidity Accuracy | ±2% between 0 and 99% RH |
| Battery Type | 2 x AA batteries (included) |
| Battery Life | Approx. 12 months |
| Wireless Range | Up to 1,700 ft (500 m) in open air |
| Wi-Fi Compatibility | 2.4 GHz only (5.0 GHz not supported) |
| Mounting Type | Freestanding, Tabletop, Wall mount |
Warranty and Support
For warranty information, detailed support, and the full user manual, please refer to the official User Manual (PDF) available for download on the product's Amazon page or the X-Sense official website.
You can also visit the X-Sense Store on Amazon for more products and support resources.





