SwitchBot W3400010 IP65 Outdoor Thermometer Hygrometer, 3-Pack

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Product guide

SwitchBot W3400010 IP65 Outdoor Thermometer Hygrometer, 3-Pack

The SwitchBot W3400010 is a three-pack of Bluetooth thermometers and hygrometers for indoor or outdoor monitoring. The listing claims IP65 protection and a 100-metre Bluetooth range with no obstacles, while remote alerts and unlimited cloud storage require a SwitchBot Hub.

At a glance

Measures temperature and humidity, with the app also supporting dew point, VPD and absolute humidity readings.
Bluetooth viewing is claimed up to 100 metres when there are no obstacles.
Stores up to 68 days of readings on-device and up to two years in the app. CSV export is supported.
Hub-dependent features include preset-value push notifications and unlimited cloud storage.

Price

£27.99Save 30%

Reference price: ~~£39.99~~

Price checked: 12 Nov 2026

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Often bought together

SwitchBot WiFi Weather Stations with Outdoor Sensor Wireless UK, Temperature Humidity Monitor with Date and Weather Forecast, Matter Hub Makes Station Work with Alexa, Apple Homekit, Google Home

£39.99

Pros and cons

Pros

Three sensors can help monitor separate locations such as a greenhouse, refrigerator or instrument case.
Claimed IP65 dust and water protection makes the units suitable for indoor and outdoor use, including rainy conditions according to the listing.
CSV export and multiple storage periods support reviewing environmental changes over time.

Cons

Notifications for threshold changes and unlimited cloud storage require a separately added SwitchBot Hub.
Bluetooth readings depend on staying within range, and the stated 100-metre limit assumes no obstacles.

Technical specifications

18 specifications

Identity
Brand	SwitchBot
Model	W3400010
Colour	White

Dimensions and installation
Mounting type listed	Wall Mount
Dimensions listed	20W x 60H millimetres
Weight listed	132 Grams

Measurement
Temperature range	- 20℃ to 60℃
Humidity range	0 to 100%RH
Temperature accuracy	± 0.2°C
Humidity accuracy	± 1.8% RH
Sampling interval	4sec

Connectivity and storage
On-board data storage	up to 68 days
In-app data storage	up to 2 years
Cloud storage	Unlimited cloud storage if SwitchBot Hub is added
Data export format	csv

Power and protection
Battery type listed	Lithium-Polymer
Battery life claim	up to two years
Protection rating claim	IP65

What to know before buying

Listing details to confirm

The listing gives conflicting physical details: dimensions are listed as 20W x 60H millimetres, while another product description gives 60×28×20 mm. It also describes a Lithium-Polymer battery in the details but specifies 2 x AAA in another section and 6*AAA (built-in) in the included-components list. Confirm the selected listing's dimensions and battery arrangement before buying. The claimed accuracy and range are manufacturer statements, not independently established measurements.

What’s in the box

Included

3 outdoor meters
User manual
6 AAA batteries, listed as built-in
3 lanyards

Who is it for?

A good fit for

People wanting multiple temperature and humidity sensors for locations such as a greenhouse, refrigerator or cellar.
Users who want to export readings and inspect temperature or humidity changes over time.
Existing SwitchBot users who can add a Hub for remote notifications and unlimited cloud storage.

Less suited to

Buyers who need remote alerts or unlimited cloud storage without adding a SwitchBot Hub.
Anyone requiring guaranteed Bluetooth coverage through walls or at the full stated range.

SwitchBot W3400010 IP65 Outdoor Thermometer Hygrometer, 3-Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 10,495 ratings

5 stars71%71%
4 stars13%13%
3 stars6%6%
2 stars4%4%
1 star6%6%

Customer feedback highlights ease of setup, portability, temperature tracking and perceived accuracy, with positive comments about usability and value. Bluetooth experiences are mixed, so the claimed 100-metre range should not be treated as assured in every setting. These reported impressions are relevant to a three-sensor Bluetooth monitoring kit, but do not establish measurement accuracy or connection performance for every installation.

Positive themes

Customers report straightforward setup, portability and useful temperature tracking over time.
The feedback summary describes positive impressions of accuracy, ease of use and value.

Mixed feedback

Bluetooth connectivity receives mixed feedback, with some reporting issues and others reporting no problems.

Frequently asked questions

Can readings be viewed remotely without a SwitchBot Hub?

The listing describes readings over Bluetooth, with a claimed range of 100 metres when unobstructed. It says preset-value push notifications and unlimited cloud storage require a SwitchBot Hub.

What data can the sensors measure?

The listing describes temperature and humidity monitoring, plus app readings for dew point, VPD and absolute humidity.

How long are readings stored?

The listing claims up to 68 days of on-board storage and up to two years in the app. Unlimited cloud storage is stated to require a SwitchBot Hub, and CSV export is supported.

What batteries does this three-pack use?

The listing is inconsistent: it names a Lithium-Polymer battery in the details, 2 x AAA in one description and 6*AAA (built-in) in the contents list. Confirm the battery arrangement for the selected listing.