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STH0A Smart Thermometer Hygrometer - 3*Alarm+1*Base Station(STH0A31)
Function
  • Requires SBS50 Base Station
  • Smart App (2.4 GHz Wi-Fi Only)
  • Alexa Compatible
  • Plant Monitoring
Quantity
Select Option
  • 3*Alarm+1*Base Station(STH0A31)

    3*Alarm+1*Base Station(STH0A31)

    $59.99

  • 1*Alarm(STH0A)

    1*Alarm(STH0A)

    $19.99

Service
  • FAST & FREE SHIPPING
  • 5-YEAR WORRY-FREE WARRANTY
    60-DAY MONEY BACK GUARANTEE
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In Stock—Estimated delivery in 3-7 business days
STH0A Smart Thermometer Hygrometer - 3*Alarm+1*Base Station(STH0A31)
  • Overview
  • Social Media
  • Specification
  • FAQ
  • Reviews

Swiss-Made Sensor for Precision Monitoring
Built with a Swiss-made sensor, the X-Sense STH0A delivers highly accurate readings: Temperature Range: -20°C to 60°C with ±0.2°C accuracy. Humidity Range: 0-99%RH with ±2%RH accuracy. This ensures precise tracking for sensitive environments like greenhouses, wine cellars, or baby rooms.
Comprehensive Temperature & Humidity Monitoring with the Smart App
Easily track your home's temperature, humidity, and dew point with real-time updates and 1 year of historical data. Perfect for maintaining indoor comfort and supporting home gardening or plant care, the app lets you set custom alerts for temperature and humidity changes, ensuring a healthy environment. Receive instant notifications, export data for free, and share monitoring access with families and friends.
Clear 2.8-Inch LCD Display with Comfort Level
Effortlessly track temperature, humidity, and comfort levels with the bright digital screen, maintain ideal conditions for your home, plants, or indoor spaces. Perfect for managing moisture levels, and indoor temperature at a glance.
Long-Range Connectivity & Unified App Control
Supports up to 50 devices (10 thermo-hygrometers) with a 1700ft (500m) range. Manage all your devices, including X-Sense smoke alarms and CO alarms, conveniently in one app.

Check the temperature or humidity of any paired device simply by asking Alexa, making monitoring effortless and intuitive.

Compact Design with Flexible Placement, supports flat placement or wall mounting.

Ideal for open spaces (living rooms, wine cellars, greenhouses) and enclosed spaces (cigar cases, guitar boxes, reptile tanks).

Specification

  • Screen Size

    2.7 inches

  • Power Supply

    2 × 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

  • Operating Temperature

    -4–140°F (-20–60°C)

  • Temperature Accuracy

    -4–32°F (-20–0°C): ±0.36–0.72°F (±0.2–0.4°C); 32–140°F (0–60°C): ±0.36°F (±0.2°C); Max Accuracy: ±0.72°F (±0.4°C)

  • Humidity Accuracy

    10–90% RH: ±2% RH; Max Accuracy: ±2.53% RH; 0–10%/90–99% RH: ±3% RH; Max Accuracy: ±3.5–5% RH

  • Operating Humidity

    0–99% RH

  • Operating Frequency

    US: 902–928 MHz; EU: 868.0–868.6 MHz

  • Max RF Power

    EU: 25 mW

  • Alarm Volume

    No sound when the temperature or humidity exceeds or falls below the set level (the base station will sound and an app push notification will be sent)

FAQs for Thermometer Hygrometer

Can STH0A work without the SBS50 Base Station?

Yes, STH0A can monitor indoor temperature and humidity independently and display the data on its screen. However, without the base station, you won't be able to use the app features for remote monitoring or data logging.

Does STH0A work during power or internet outages?

Absolutely! STH0A has a built-in battery, so it can continue monitoring and displaying temperature and humidity during power or internet outages, as long as the battery has power. During internet outages: STH0A can store up to 15 days of data, provided the base station remains powered. Data will sync to the app as soon as the connection is restored. During base station power outages: The thermo-hygrometer can store up to 3 days of data, which will upload to the base station once power is restored. This ensures uninterrupted monitoring and reliable data storage, even in challenging conditions.

What are the key differences between the STH0A and the STH54 thermo-hygrometers?

The main difference lies in the display:

The STH0A features a 2.8-inch LCD screen that shows real-time temperature, humidity, and comfort levels directly on the device.So you can use the STH0A directly without the base station if you don't need the smart APP functions. The STH54 does not have a display and relies entirely on the app for monitoring.

The STH0A supports dew point and VPD (Vapor Pressure Deficit) tracking via the app, while the STH54 does not include this plant-friendly features.

Can the X-Sense STH0A Thermo-Hygrometer be used in a refrigerator or freezer?

Not recommended. Prolonged use in refrigerators or freezers is discouraged because low temperatures can shorten battery life and affect device connectivity. The recommended working temperature range is 14°F to 140°F (-10°C to 60°C) for optimal performance.

Customer Reviews

Based on 53 reviews
74%
(39)
13%
(7)
6%
(3)
4%
(2)
4%
(2)
A
Anonymous
Easy to set up

Easy to set up. Seems accurate. Just whati needed!

K
KATRINA BERTINOT

so far this is working amazing. I have 2 schnauzers and I can monitor the temp with alerts

N
Nancy Rodriguez
Perfect for Tracking Temperature Over Time

Simple and sleek design, great app, and easy to connect. I bought it to log temperature over time, and it works really well.

W
William Turner
A High Performing Sensor

Compact and discreet fits anywhere without drawing attention. It tracks temp and humidity, sends alerts via a free app, and works great with Alexa. Easy to set up with Wi Fi and gives hourly graphs. I can even link it to other apps to control the AC based on my preferences.

W
William Leveque
Excellent, Indoor Use Only

I use this to monitor temperature and humidity for my heat pump and solar thermal room. It's really helpful and sends data every hour, which is enough for me. It connects to the heat pump via Wi Fi.

Note: For indoor use only it's not suitable for overly humid environments. Battery life is still to be determined.