X-SENSE STHOA Smart Thermometer Hygrometer User Manual
Model: STHOA
Introduction
This smart thermometer hygrometer features a clear display for viewing temperature, humidity, and comfort levels directly on the screen, or you can check these details via the app. It also sends alarm notifications through the app when connected to the base station. Reliable and user-friendly, it is ideal for homes, greenhouses, and more.
Product Overview
Thermometer Hygrometer Components
Wi-Fi Signal Strength: The signal strength between the thermometer hygrometer and the base station.
No Signal: The thermometer hygrometer is disconnected from the base station.
Pair/Unit Switch Button: Double-press to enter Wi-Fi pairing mode; single-press to switch between Fahrenheit (°F) and Celsius (°C).
Comfort Levels
Human Body's Comfort Levels (Default): Based on human perception, settings cannot be changed.
Customize Comfort Levels (Set via App): Define comfort ranges for specific needs.
Device Indicators
- Wi-Fi Signal Strength: Indicates connection status.
- Battery Status: Shows remaining battery life.
- Comfort Level: Displays comfort status based on readings.
- Temperature: Shows current temperature.
- Humidity: Shows current humidity percentage.
- Pair/Unit Switch Button: Used for pairing and unit switching.
Device Structure
- Back Cover Opening: Pry open with thumb or slot-type screwdriver.
- Compartment: Houses the battery.
- Hanging Slot: For wall mounting.
- Stand Opening: For placing the device on a surface.
- Battery: Power source.
Package Contents
- Thermometer Hygrometers
- AA Batteries (pre-installed)
- User Manual
Device Setup
Download the X-Sense Home Security App
Download the app from the Apple App Store or Google Play. Ensure your smartphone supports iOS 11 and higher, or Android 8.0 and higher. Sign up or log in with a valid email address.
Before Connecting Devices
- Know your Wi-Fi network name and password.
- Use a 2.4 GHz Wi-Fi network (5 GHz is incompatible).
- Ensure Bluetooth is enabled on your phone.
Note: For faster configuration, keep your mobile phone and device close to the router.
Connect to the Base Station
The thermometer hygrometer connects to the base station wirelessly. Push notifications are sent via the app.
- In the app, select "Thermo-hygrometers" from the product list, then choose "STHOA".
- Name the thermometer hygrometer and select its room.
- Remove the back cover, take out the battery insulating film, and ensure correct battery polarity.
- Press the Pair/Unit Switch Button twice on the device until the signal icon flashes rapidly to enter pairing mode.
- Tap "Next" in the app. You will hear "Ready to add the device."
- Upon successful connection, you will hear "Device added." The device will appear in the device list.
Note: If pairing fails within 60 seconds, the device exits configuration mode. Repeat the steps.
Installation Method
- Hanging: Suitable for wall-mounted installations.
- Place On a Flat Surface: Suitable for most situations.
- Use the Stand: Suitable for lower installation positions.
Using Your Thermometer Hygrometer
The app interface may vary slightly between iOS and Android, but functions remain the same. App content may differ from the manual due to updates.
Setting Alarms
Set temperature and humidity ranges in the app. When levels exceed the set range, an app push notification is sent, and the base station may sound an alarm (alarm function can be disabled). Use sliders or dropdown lists to select tracking ranges.
Comfort Levels
Choose between "Human Body's Comfort Levels" (default) or "Customize Comfort Levels" to define preferred ranges for environments like living spaces, greenhouses, or basements.
Temperature Unit
Switch temperature units between Fahrenheit (°F) and Celsius (°C) using the Unit Switch on the device or in the app. Changes sync automatically.
Scheduled Export
Configure data export frequency (daily, weekly, monthly) for previous day's data.
Export Data
Export data in CSV format via the app. Data can be exported for up to six months (180 days) at a time. Only temperature and humidity data are supported.
Device Test
Use the "Device Test" feature in the app to ensure the sensor, power supply, and other parts are functioning correctly. The device screen will flash three times during the test.
Technical Specifications
| Specification | Details |
|---|---|
| Screen Size | 2.7 inches |
| Power Supply | 2 x AA batteries (Pre-installed, Replaceable) |
| Voltage | 1.5 V DC |
| Battery Capacity | 1,800 mAh |
| Product Life | 5 years |
| Battery Life | 1 year |
| Material | ABS |
| Alarm Volume | No sound on device; base station and app notifications. |
| Maximum Number of Allowed Units | Up to 50 devices per base station; max 10 thermo-hygrometers (STH51/STHOA combined). |
| Operating Temperature | -4–140°F (-20–60°C) |
| Operating Humidity | 0–99% RH |
| Operating Frequency | US: 902–928 MHz, EU: 868.0–868.6 MHz |
| Max. RF Power | EU: 25 mW |
| Temperature Accuracy | -4–32°F (-20–0°C): Typical ±0.36–0.72°F (±0.2–0.4°C); Max ±0.72–1.26°F (±0.4–0.7°C) 32–140°F (0–60°C): Typical ±0.36°F (±0.2°C); Max ±0.72°F (±0.4°C) |
| Humidity Accuracy | 10–90% RH: Typical ±2% RH; Max ±3.5% RH 0–10%/90–99% RH: Typical ±2–3% RH; Max ±3.5–5% RH |
Note: Humidity accuracy measured at 77°F (25°C); accuracy may be affected by temperature changes.
Battery Replacement
- Pry open the battery cover using the notch at the top.
- Install batteries, ensuring correct polarity.
- Close the back cover until it clicks.
Maintenance
- The device operates in -4°F to 140°F (-20°C to 60°C) and 0–99% RH. Recommended long-term range: 14°F to 140°F (-10°C to 60°C).
- Handle with care; do not attempt to disassemble.
- Do not immerse in water.
Troubleshooting
| Problem | Cause | Solution |
|---|---|---|
| Base station failed to connect to network. | Incorrect Wi-Fi name/password. | Enter correct Wi-Fi credentials. |
| Phone Bluetooth is not turned on. | Turn on phone's Bluetooth. | |
| Base station not entering pairing mode. | Press and hold Pair button for 5 seconds until LED flashes yellow. | |
| Thermometer hygrometer cannot connect to base station. | Thermometer hygrometer does not enter pairing mode. | Quickly press the Pair button twice on the thermometer hygrometer. |
| Alarm volume of base station is low. | Alarm sound set to low. | Adjust volume in Device Settings → Sound Settings → Base Station Alarm Volume. |
| Push notifications failed, or app prompts show operation failed. | App push notification permission disabled. | Enable push notification permission on the phone. |
| Device batteries ran out. | Replace batteries. | |
| Communication between base station and router obstructed or distance too far. | Obstacles (metal doors, thick walls) or distance. | Reduce obstacles. Max distance: 170 ft (50 m) in open environment. |
| Communication between thermometer hygrometer and base station obstructed or distance too far. | Obstacles or distance. | Reduce obstacles. Max distance: 1700 ft (500 m) in open environment. |
| Thermometer hygrometer placed on a metal surface. | Metal surfaces interfere with wireless signal. | Avoid placing on metal surfaces. |
| Network connection of router/mobile phone abnormal. | Abnormal network connection. | Ensure router and mobile phone network are normal. |
| Wi-Fi connection of base station disconnected. | Router network connected to base station is abnormal. | Ensure router network is normal. |
| Base station is powered off. | Base station power supply not connected normally. | Ensure power supply is connected normally. |
| App indicates low battery, and screen shows one bar of battery. | Device batteries ran out. | Replace batteries. |
FAQ
Can it be used in the fridge or freezer?
Using in refrigerators/freezers shortens battery life and affects connection. Recommended ambient temperature for prolonged operation is 14–140°F (-10–60°C).
Can it be used in a high humidity environment for a long time?
Not recommended for long-term use in high humidity (above 80% RH) due to lack of waterproofing, which can cause condensation and damage.
How do I set the temperature and humidity alarm range?
Go to "Device Settings" and use the "Temperature Alarm" and "Relative Humidity Alarm" settings to adjust ranges via sliders or dropdown lists.
Why doesn't the thermometer hygrometer immediately display accurate temperature after significant environmental change?
The device needs time to adjust to new environmental conditions, which can take minutes to hours depending on the change.
Why might temperature/humidity changes be slower or faster compared to other devices?
Reasons include: testing in extreme conditions (freezer/fridge), differences in surrounding environment/placement, and the device's design for stable, long-term monitoring rather than rapid response.
Why does the device screen show condensation or abnormalities in high humidity environments (e.g., greenhouse)?
Extreme humidity with condensation can cause malfunctions. If this occurs, remove batteries, dry the device and compartment, and place in a dry, ventilated area for 24 hours with the compartment open. Reinstall batteries. If issues persist, replace the device.
How do I export data?
In the app, tap the thermometer hygrometer, drag to the bottom, and tap "Export Data." Data can be exported for up to six months (180 days). Only temperature and humidity data are supported.
How do I calibrate the temperature and humidity?
The device is factory calibrated. If recalibration is desired, use the "Calibration" setting under "Device Settings."
How do I distinguish which device in the app corresponds to the real device?
Method 1: Label the back of the device with the name shown in the app. Method 2: Use the "Device Test" feature in the app; the tested device's screen will flash slowly three times.
FCC Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) it may not cause harmful interference, and (2) it must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with limits for a Class B digital device, providing reasonable protection against harmful interference in residential installations.
RF Energy Exposure and Product Safety Guide: Read the guide for important operating instructions, control information, and compliance with RF Energy Exposure limits. User instructions should accompany the device when transferred.
Environmental Protection
The crossed-out wheeled-bin symbol indicates that electrical and electronic products, batteries, and accumulators must be taken to designated collection locations at the end of their life. Dispose of them according to local laws and rules.
Simple EU Declaration of Conformity
X-Sense Electronics Co., Ltd. declares that this radio equipment complies with essential requirements and relevant provisions of RED Directive 2014/53/EU, RoHS Directive 2011/65/EU, and WEEE Directive 2012/19/EU. The full text of the EU declaration of conformity is available at www.x-sense.com.
Manufacturer and Service Information
Manufacturer: X-Sense Electronics Co., Ltd.
Address: Room 402, Building 4, No. 9, Jinshagang 1st Road, Shixia Village, Dalang Town, Dongguan City, 523750 Guangdong, P.R. China
Email: support@x-sense.com
