X-Sense STH0A31 Wi-Fi Thermometer Hygrometer with LCD and 3 Sensors

X-Sense STH0A31 is a Wi-Fi thermometer and hygrometer with an LCD, three sensors and a base station. It offers app monitoring, configurable alerts and temperature and humidity history, but requires a 2.4 GHz Wi-Fi network.

At a glance

App provides remote temperature and humidity monitoring, graphs, and maximum, minimum and average readings over time.
Set temperature and humidity thresholds for phone notifications and a base-station alarm.
The display includes comfort indicator icons with customizable settings.
The app supports switching between °F and °C and allows up to 12 users to monitor.

Price

$42.99Save 19%

Reference price: ~~$52.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Three sensors and a base station support monitoring across more than one location, according to the product title.
App graphs and summary readings help track changing conditions over time.
Both phone notifications and an audible base-station alarm are available when readings exceed configured ranges.

Cons

Wi-Fi connection is limited to 2.4 GHz, so a 5.0 GHz-only network is incompatible.

Technical specifications

10 specifications

Identity
Brand	X-Sense
Model	STH0A31
Color	Black

Dimensions and installation
Dimensions listed	2.7"W x 3"H
Mounting types listed	Tabletop, Wall Mount

Monitoring and connectivity
Wi-Fi compatibility	Compatible only with 2.4 GHz Wi-Fi (incompatible with 5.0 GHz); connects to the X-Sense Home Security App via the included base station
Temperature accuracy	±0.36°F (±0.2°C)
Humidity accuracy	±2% between 0 and 99%
Humidity range	0 and 99%

Power
Battery description	6 AA alkaline batteries

What to know before buying

Listing details to confirm

The listing gives a 0% to 99% RH operating range in its details but states accuracy as ±2% between 0 and 99% in the feature description. It also describes accuracy in both ±0.2°C and ±0.36°F terms. Check the selected listing for the precise stated conditions. The app requires the included base station and 2.4 GHz Wi-Fi. The product details list six AA alkaline batteries, but the package contents are not specified.

Who is it for?

A good fit for

People who want app-based temperature and humidity checks in multiple areas, including RV monitoring.
Buyers who want threshold notifications and historical graphs for indoor conditions.

Less suited to

Anyone whose Wi-Fi network only provides 5.0 GHz connectivity.
Buyers seeking a clearly documented package inventory before ordering.

X-Sense STH0A31 Wi-Fi Thermometer Hygrometer with LCD and 3 Sensors · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 289 ratings

5 stars79%79%
4 stars9%9%
3 stars5%5%
2 stars3%3%
1 star4%4%

Customer feedback reports easy setup and Wi-Fi connection, useful temperature and humidity tracking, and remote checks, including for RV monitoring. The product listing describes app graphs and remote monitoring that align with those reported uses. Temperature monitoring feedback is mixed, so buyers who depend on readings for a specific application should consider that variation. Aggregate ratings lean positive overall but do not explain individual experiences.

Positive themes

Customers report straightforward setup and Wi-Fi connection.
Feedback highlights perceived accuracy, data tracking and remote monitoring.

Mixed feedback

Temperature monitoring feedback is mixed.

Frequently asked questions

Does the STH0A31 work with 5.0 GHz Wi-Fi?

No. The listing says it is compatible only with 2.4 GHz Wi-Fi and connects to the X-Sense Home Security App through the included base station.

Can it send alerts when readings cross a threshold?

Yes. The listed features include phone notifications and a base-station alarm for temperature or humidity outside a set range. A phone low-battery warning is also listed.

What can the app show?

The listing describes remote temperature and humidity monitoring, graphs, maximum, minimum and average readings over time, and switching between Fahrenheit and Celsius.

Are batteries included?

The details list six AA alkaline batteries, but the package contents are not provided. Confirm whether batteries are included in the selected listing.