ECOWITT WN31 Wireless Multi-Channel Thermometer and Hygrometer Sensor, Indoor and Outdoor Temperature & Humidity Gauge with LCD Display, Remote App Monitoring, Dip Switches to Switch ℃ or ℉ : �鶹��.ca: Industrial & Scientific

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ECOWITT WN31 Wireless Multi-Channel Thermometer and Hygrometer Sensor, Indoor and Outdoor Temperature & Humidity Gauge with LCD Display, Remote App Monitoring, Dip Switches to Switch ℃ or ℉

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596 ratings

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Colour	White
Brand	ECOWITT
Product Dimensions	12.3W x 1.4H Centimetres
Battery description	2 AA batteries
Lower temperature rating	14 Degrees Fahrenheit
Mounting type	Tabletop
Upper temperature rating	6E+1 Degrees Celsius
Voltage	3 Volts
Temperature accuracy	± 1°C
Manufacturer	ECOWITT

About this item

【Wireless Multi-channel Thermometer Hygrometer】Ecowitt WN31(WH31) Thermometer & Hygrometer measures temperature & humidity and can view the current temperature and humidity on the LCD display. The data can be streamed by Ecowitt GW1100 Wi-Fi Gateway, HP2551, WH2680 and WN1900( These devices are all sold separately ) and can be viewed on our WS View Plus/ Ecowitt APP after the Wi-Fi configuration done.
【Supports up to 8 channels】Ecowitt WN31(WH31) thermo-hygrometer gauge allows you to track temperature and humidity at up to 8 locations (additional sensors are sold separately). They can be placed at your living room/bedrooms/bathroom/basement/garage/guitar room/baby room and etc; each channel number can be customized on your practical requirements by dialing the dip switches.
【Remote APP Monitoring & Email Alerts】If you want to view the multi-channel sensors' data on your mobile application, you need to pair this WN31(WH31) thermo-hygrometer sensor with Ecowitt GW1100 Wi-Fi Gateway, HP2551, WH2680, WN1900 console(These Devices are sold separately) after Wi-Fi configuration. Supports uploading the data to free Ecowitt Weather Server(ecowitt.net) to view all the data graph / download history records / set e-mail alerts for all the sensors on the website.
【Easy to Use】2 pcs AA batteries(NOT included) powered. Dialing the 1st to 3rd dip switches to customize the channel number; while dialing the 4th dip switch to freely switch between ℃ and ℉. If you want to pair this device with GW1100 wi-fi gateway(sold separately), please refer to the GW1100 quick start to get the wi-fi configuration procedures.
【Outdoor & Indoor Use】The wireless transmission range is up to 100m/328ft in the open field, allowing you to use it in outdoor and indoor. If you want to install the sensor outside, it's recommended to install it inside a solar radiation shield to obtain best accuracy and protection.The sensor data will be transmitted every 60 seconds.
【About the RF Frequency of Ecowitt's products】: This WN31(WH31) Thermometer & Hygrometer is 915 MHz and the products which are pairing with this device also need to be 915 MHz ( The frequency of products sold in US/CA is 915 MHz ; The European 868 MHz；The Australia 433 MHz. )

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Product details

Batteries ‏ : ‎ 2 AA batteries required.
Is discontinued by manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 5 x 5 x 13 cm; 60 g
Date First Available ‏ : ‎ Dec 21 2018
Manufacturer ‏ : ‎ ECOWITT
Place of Business ‏ : ‎ Room 601, Block A, Building 1, Phase 1, Shenzhen International Innovation Valley, Dashi 1st Road, Xili Community, Nanshan District, Shenzhen City, China
ASIN ‏ : ‎ B07JLRJRLM
Item model number ‏ : ‎ WN31

�鶹�� Rank: #2,639 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
- #4 in Temperature Probes & Sensors

Customer Reviews:
596 ratings

This item: ECOWITT WN31 Wireless Multi-Channel Thermometer and Hygrometer Sensor, Indoor and Outdoor Temperature & Humidity Gauge with LCD Display, Remote App Monitoring, Dip Switches to Switch ℃ or ℉

$19.99

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Product Description

Feature

Measures temperature and humidity.
With display and work with GW1000/GW1100 Wi-Fi gateway(sold separately) to complete the WIFI configuration on our WS View Plus or Ecowitt App.
Supports up to 8 sensors(additional sensors sold separately).
Transmission distance in open field: 100m(328 feet)
Fahrenheit and Celsius selectable
If you choose to upload the data to our own weather server, you can view the history graph and downlaod the history records on the website.
Works with HP3501 WiFi Weather Station

Specification

Temperature Range	-40°C —— 60°C (14°F —— 140°F)
Temperature Resolution	0.1°C, or 0.1°F
Temperature Accuracy	± 1°C ( ±33.8°F )
Humidity Range	10% ~ 99%
Humidity Resolution	1%
Humidity Accuracy	± 5%
Sensor Reporting Interval	about 60 seconds
Sensor Size	123 x 42 x 14 mm
Power	2 x AA batteries ( NOT included )
Frequency	915 MHz ( North America: 915MHz; Europe: 868MHz; Other areas: 433MHz )

Package Content

1 x Multi-channel Temperature and Humidity sensor
1 x User Manual

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Customer reviews

596 global ratings

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Customers like the functionality, ease of setup, and connectivity of the humidity meter. They mention it works well with their Ecowitt system, is easy to connect through WiFi, and has a nice range.

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Functionality Easy to set up Connectivity Accuracy Range

10 customers mention "Functionality"10 positive0 negative

Customers like the functionality of the humidity meter. They mention it works great with their Ecowitt system and works right out of the box. Customers also say it works with the Gateway GW-1000 and Hubitat Elevation automation hub.

"I used to keep check on fridge when away. Wirks great even in the fridge and freezer" Read more

"...the gateway in one room and a sensor in each of 2 other rooms and they work great...." Read more

"Excellent support if you need it. The Ecowitt products work right out of the box. No setup needed." Read more

"Very simple to set up. Works fantastic. I look forward to getting more." Read more

8 customers mention "Easy to set up"8 positive0 negative

Customers find the humidity meter easy to set up. They mention it's very easy to configure, use, and integrates into their home automation system without any problems. Customers also appreciate the automatic sensor pairing process.

"...The sensor pairing process is automatic. The range is fantastic. The accuracy seems bang on...." Read more

"...Hubitat elevation, through a custom app (easy to install) and with the latest firmware on a C-7 unit is working as expected...." Read more

"...was also able to integrate into HA without any problems! I'll be ordering a couple more soon!" Read more

"The unit is very easy to configure and use" Read more

5 customers mention "Connectivity"5 positive0 negative

Customers like the connectivity of the humidity meter. They mention it's quickly connected and maintains connections. Customers also say it's easy to connect through WiFi.

"...acurate and was recognized directly bythe gateway, 20 seconds after the batteries were inserted...." Read more

"...switched the channel to "2" and put in batteries, it was auto connected to the wall console and showed up in the Ecowitt app as another temperature..." Read more

"I set it to CH2 ,and it connected in less than a minute and even the app on my phone undated right away. its part of my HP 2553 system." Read more

"Fantastic! Easy to connect to through WiFi. An absolute must to know what’s going on at all times. Data logger is free...." Read more

3 customers mention "Accuracy"3 positive0 negative

Customers are satisfied with the accuracy of the humidity meter. They mention the range is fantastic.

"...The range is fantastic. The accuracy seems bang on...." Read more

"...The range is good and accuracy is comparable to a mercury thermometer." Read more

"Easy to use, accurate and works...." Read more

3 customers mention "Range"3 positive0 negative

Customers like the range of the humidity meter. They mention it has more than 10 meters within their homes.

"...The range is nice (as expected, more than 10 meters within my house (old bricks)...." Read more

Top reviews from Canada

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RayJ
Fantastic, seamless system
Reviewed in Canada on September 18, 2020
Verified Purchase

I am a weather buff, and tech snob! So this is where my 2 passions meet. I was in the market for a modular weather station / system, and came across the Ecowitt suite of products. Affordable, and good reviews is ultimately what made me pursue the product even further. I was attracted by their modular approach, whereby I can locate each sensor in optimal siting for their respective measurement. In total (thus far...) I have purchased the gateway, the outdoor temp / humidity sensor, 3 indoor temp / humidity sensors, and the rain gauge. Anemometer and soil moisture meter will be added at a later date. The sensor pairing process is automatic. The range is fantastic. The accuracy seems bang on. The presentation of data that is published and viewable on the ecowitt website is well thought out and pleasing to the eye. Top kudos to Ecowitt team. The data viewable in the WS View app is not as good as the website view, but just remember that the WS View app is just used to help in the setup process, and only the full enjoyment and benefit comes when you publish your weather data (either public or private) to the Ecowitt site.

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4 people found this helpful

Helpful

Mike
Excellent and accurate sensor. works with gateway GW-1000 and Hubitat Elevation automation hub
Reviewed in Canada on February 6, 2022
Verified Purchase
This sensor is acurate and was recognized directly bythe gateway, 20 seconds after the batteries were inserted. The range is nice (as expected, more than 10 meters within my house (old bricks).
Hubitat elevation, through a custom app (easy to install) and with the latest firmware on a C-7 unit is working as expected.
I also managed to install a link between an "old" HE C-5 unit with a non-updated firmware (for specific reasons) through node-red.
You need to install the Ecowitt app (Android in my case) to recognize the sensors.
But, when set, all is local (no cloud) for security and speed.
Worth the purchase.

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Helpful

M. A. Stuart
Flawless integration
Reviewed in Canada on January 7, 2025
Verified Purchase
I have a WS HP2551 and once I had switched the channel to "2" and put in batteries, it was auto connected to the wall console and showed up in the Ecowitt app as another temperature point!

was also able to integrate into HA without any problems! I'll be ordering a couple more soon!

Read more

Helpful

Carl
Great to keep tabs of fridge when away
Reviewed in Canada on October 3, 2024
Verified Purchase
I used to keep check on fridge when away. Wirks great even in the fridge and freezer

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Helpful

Steven M.
Works very well.
Reviewed in Canada on August 27, 2024
Verified Purchase
I set it to CH2 ,and it connected in less than a minute and even the app on my phone undated right away.
its part of my HP 2553 system.

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Helpful

Terry
Easy set up
Reviewed in Canada on January 31, 2025
Verified Purchase
The unit is very easy to configure and use

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Helpful

Shawn L
Great little weather station !
Reviewed in Canada on September 2, 2020
Verified Purchase
Fantastic! Easy to connect to through WiFi. An absolute must to know what’s going on at all times. Data logger is free. Buying more sensors when they came available.

Update: fantastic customer service! Honestly great tools for the grow. Free online database. Can’t go wrong!!

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Helpful

LBogan
Easy to use, accurate and works.
Reviewed in Canada on January 30, 2022
Verified Purchase
I use this sensor outside in may workshop and it lets me know the temperature there on my weather station. It quickly connected and maintains connections. When in the workshop, I can read the temperature on the display with the sensor.

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Dave Gore
Excellent product, works as advertised.
Reviewed in the United States on June 6, 2025
Verified Purchase

I purchased two of these units, one to keep upstairs and one for the basement. My upstairs is over our garage so it's always warmer in the summer, colder in the winter. Now we can have an idea of how much different the climate will be, same for the basement. Connectivity was a breeze, just have to change the dip switch if using multiples for the different channels.

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Herbert G.
Genaue Temperaturangabe und einfache Handhabung
Reviewed in Germany on April 23, 2025
Verified Purchase
Prima Ergänzung zur Ecowitt Wetterstation. Preislich fair und Einbindung sehr einfach möglich. Schön ist das kleine integrierte Display, sodass man nicht zwingend auf die App angewiesen ist. Das wichtigste ist natürlich die Genauigkeit der Temperatur und hier kann ich nur positives berichten, passt alles!

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Gabriela Ostrowska
Bardzo polecam.
Reviewed in Poland on May 22, 2025
Verified Purchase
Połączył się z moją stacją sbs-ws-500 zaraz po włożeniu baterii. Jedyne co trzeba zrobić to wybrać kanał. Działa przez trzy ściany i gruby izolowany sufit. Sprawdzony także w tunelu foliowym poza domem. Także tam jest w zasięgu stacji.

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Conmike12
Easy to install & is working , without any bother for 8 months now . Highly recommended
Reviewed in the United Kingdom on January 22, 2025
Verified Purchase
Great!

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stevenkw2t
multi WH31 sensors to monitor home humidity and temperature
Reviewed in Australia on June 29, 2020
Verified Purchase
I bought 3 WH31 sensors to go with my existing HP2551 weather station, and they work very well.
We have a damp problem in the house and have bought two dehumidifiers to improve the situation, but I wanted a way to measure the humidity in each room to figure out what was really going on. Firstly I researched the sensors available as part of 'smart home' systems. I've never bothered with Google Nest or Alexa or smart lighting but I thought my humidity problem might be a good reason to make a start. Not the case. Smart home systems use wifi or zigbee or sometimes bluetooth. These are great for transmitting a lot of data but they are power hungry and don't travel well through obstructions. Reviews of smart home temp/humidity sensors commonly complained of short battery life and their inability to connect through internal walls. These sensors only transmit tiny amounts of data and only every minute or so. Wifi or bluetooth is just the wrong band.
In January 2019 I had bought an Ecowitt HP2551 weather station and I have been happy with it. It came with a single WH32 internal sensor, as well as the external unit and a screen/gateway. I had been moving the WH32 around the house to understand our humidity problem. It had no problem transmitting though 3 internal brick walls and ran on 2 rechargeable AA cells for well over a year. After discounting smart home options I had a close look at the Ecowitt website to see if I could get some more internal sensors. I discovered that it is not possible to connect more WH32 sensors but that the WH31 model is 'multi-channel' and gateways like the GW1000 can connect to 8 of them - and so can my HP2551 weather station gateway. Just to be clear - the gateway uses wifi to connect to my home network and to the internet, but the sensors use the 433Mhz band to connect to the gateway. 433Mhz is also used by other low power / low bandwidth devices such as garage door openers.
I can monitor the real-time temp/humidity on the weather station gateway screen but I have set up an account at ecowitt.net which produces daily graphs showing my external weather data as well as the data from my 4 internal sensors. This has proven to be a very cost-effective way to monitor humidity in different rooms of the house.
A few final points:
- I needed to update the firmware on my HP2551 gateway to get all the features I wanted (instructions on the Ecowitt website)
- you need to install a phone app to configure the multi-channel sensors and have them working on ecowitt.net
- the equivalent sensors for smart home systems were far more expensive (maybe smart home systems are sexier than weather systems).

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ECOWITT WN31 Wireless Multi-Channel Thermometer and Hygrometer Sensor, Indoor and Outdoor Temperature & Humidity Gauge with LCD Display, Remote App Monitoring, Dip Switches to Switch ℃ or ℉

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Accessories

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Top reviews from Canada

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Top reviews from other countries

5.0 out of 5 stars Excellent product, works as advertised.

5.0 out of 5 stars Genaue Temperaturangabe und einfache Handhabung

5.0 out of 5 stars Bardzo polecam.

5.0 out of 5 stars Easy to install & is working , without any bother for 8 months now . Highly recommended

5.0 out of 5 stars multi WH31 sensors to monitor home humidity and temperature

Excellent product, works as advertised.

Genaue Temperaturangabe und einfache Handhabung

Bardzo polecam.

Easy to install & is working , without any bother for 8 months now . Highly recommended

multi WH31 sensors to monitor home humidity and temperature