SwitchBot W3400010 IP65 Outdoor Thermometer Hygrometer

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Product guide

SwitchBot W3400010 IP65 Outdoor Thermometer Hygrometer

SwitchBot W3400010 is a compact thermometer and hygrometer for indoor or outdoor monitoring, with Bluetooth readings, data export and claimed IP65 dust and water protection. Its stated Bluetooth range is up to 100 metres without obstacles, while app notifications require a SwitchBot Hub.

At a glance

Bluetooth access to readings is claimed up to 100 metres with no obstacles.
The app supports data export as a CSV file, with up to 68 days of onboard storage claimed.
Dew point, VPD and absolute humidity readings are supported. Push notifications for preset thresholds require a SwitchBot Hub.
The listing describes the meter as IP65-rated for indoor and outdoor use.

Price

£10.99Save 27%

Reference price: ~~£14.99~~

Price checked: 12 Nov 2026

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Often bought together

SwitchBot Thermometer, Temperature and Humidity Meter with Date and Time, Outdoor Sensor Required for Weather Stations Function, Free Data Storage Export

£18.99

Pros and cons

Pros

Compact, lightweight design with a lanyard for hanging in different locations.
CSV export and historical readings may suit users who want to review temperature and humidity changes over time.
The stated measurement features extend beyond basic temperature and relative humidity to dew point, VPD and absolute humidity.

Cons

Remote push alerts depend on purchasing or already having a compatible SwitchBot Hub.
Bluetooth readings depend on being within range, and the stated 100-metre range is specified only with no obstacles.

Technical specifications

16 specifications

Identity
Brand	SwitchBot
Model	W3400010

Measurements and connectivity
Temperature accuracy claimed	0.2 degrees_celsius
Humidity range	0-100% relative humidity
Temperature range claimed	- 20℃ to 60℃
Bluetooth range, unobstructed	100 meters connecting distance (no obstacles)
Sampling interval claimed	4sec sampling interval
On-device data storage claimed	up to 68 days On-board Data Storage
App data storage claimed	up to 2 years In-App Data Storage(Unlimited cloud storage if SwitchBot Hub is added)
Battery life claimed	up to two years
Ingress protection claimed	IP65 dustproof and waterproof

Dimensions and installation
Mounting types listed	Wall Mount
Dimensions listed	28W x 60H millimetres
Weight listed	44 Grams
Colour	white

Power
Battery description	Lithium-Ion

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: dimensions are also stated as 60×28×20 mm, temperature limits are separately listed as -20℃ to 60℃ and 253.15 Degrees Celsius at the lower end and 140 Degrees Fahrenheit at the upper end, and battery information says both Lithium-Ion and two built-in AAA batteries. Check the selected listing for the applicable dimensions, temperature limits and battery type.

What’s in the box

Included

Outdoor Meter
User manual
2 built-in AAA batteries
Lanyard

Who is it for?

A good fit for

People who want temperature and humidity monitoring in a refrigerator, greenhouse, instrument case or other indoor or outdoor space.
Users who want to export historical readings and can retrieve them over Bluetooth.
SwitchBot system owners who want Hub-dependent threshold notifications or unlimited cloud storage.

Less suited to

Buyers who need remote alerts without a SwitchBot Hub.
People needing guaranteed Bluetooth coverage through walls or across the full stated distance in obstructed settings.

SwitchBot W3400010 IP65 Outdoor Thermometer Hygrometer · 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 describes the meter as easy to use and portable, with reports of accurate temperature readings and useful tracking of changes over time. That aligns with its compact design and stated data-storage and export functions. Bluetooth experiences are mixed, so buyers relying on readings at the limit of the claimed unobstructed range should consider that feedback. Aggregate ratings are generally favourable but do not establish performance in a particular setup.

Positive themes

Customers report ease of use, portability and accurate temperature readings, including tracking changes over time.

Mixed feedback

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

Frequently asked questions

Does this meter send phone alerts on its own?

The listing says push notifications for preset thresholds require a SwitchBot Hub. Bluetooth is used to view readings within range.

How much data can it store?

The listing claims up to 68 days of onboard storage and up to two years in-app storage. Unlimited cloud storage is stated to require a SwitchBot Hub. Data can be exported as a CSV file.

Can it be used outside?

The listing describes it as IP65 dustproof and waterproof for indoor and outdoor use. Its specific temperature limits differ across listing details, so confirm the applicable range before using it in extreme conditions.

What batteries does it use?

The package details say two AAA batteries are built in, but another specification describes the battery as Lithium-Ion. Check the selected listing to confirm the battery type.