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The ECOWITT WH31 Wireless Multi-Channel Thermometer and Hygrometer Sensor offers precise temperature and humidity monitoring across up to 8 locations. Featuring a clear LCD display and 60-second wireless data transmission, it pairs with Ecowitt Wi-Fi gateways for remote app access and email alerts. Battery-powered and easily customizable, it’s designed for indoor use with professional-grade accuracy and seamless integration into your smart environment.


| Manufacturer | ECOWITT |
| Part number | FG-WH37BN-ECO1 |
| Item Weight | 70 g |
| Product Dimensions | 5 x 5 x 13 cm; 70 g |
| Batteries | 2 AA batteries required. |
| Item model number | WN31 |
| Colour | White |
| Style | WH31 |
| Material | Plastic, Battery |
| Power source type | Battery Powered |
| Item Package Quantity | 1 |
| Display style | LCD |
| Plug profile | Freestanding |
| Special Features | High precision |
| Specific uses | Humidity, Temperature |
| Included components | remote |
| Batteries included? | No |
| Batteries Required? | Yes |
| tech_spec_battery_description_toys | Alkaline |
M**.
Perfect pairing with an Ecowitt hub/station
Purchased this to like to my Wittboy weather station, I wasn't expecting much but wow. I have a bike shed that gets alarmingly hot, and I use extractor fans to toggle at certain temperatures, I've used 3 smart thermometers but they all seem to have substantial delays in readings not to mention the bike shed is made of steel so signals are an issue. But with these, they update almost real time and the fans are doing a much better job of reducing temperatures by kicking in earlier, signal is perfect no matter where they seem to be placed on the property and all appear accurate out of the box. Also are probably the cheaper thermometers I've purchased yet perform the best. Battery life also so far seems very good, I ended up buying two more units and have gotten rid of all my other smart thermometers. Works nicely with Home Assistant also. Very happy indeed!
C**2
Easy to install & is working , without any bother for 8 months now . Highly recommended
Great!
A**E
Great addition to my weather centre
Connected without any problems.
A**N
Decent Price and does what it says.
I now have 4 of these additional sensors. Am delighted with them. They take 2 AA batteries and my ECOWITT HP 2511 weather station picks 'em up immediately as soon as the batteries are installed. The console alternates between all installed sensors and the whole system works exactly like it should. Highly recommended to pair with your ECOWITT weather Station. As a test I took one sensor and put it inside a small fridge, not expecting it to work as that fridge was at least 100ft+ feet away. and has metal walls! To my astonishment and delight, it send the data back to my HP2511 without any problems. Absolutely amazing !. If interested ? See my review of the HP2511.
P**H
Great with the Wittboy weather station
We got a couple of these to go in our basement and garage and link to our Ecowitt Wittboy weather station The instructions for linking them aren't great, so they took a while to set up, and the display functionality on the Wittboy is limited, but they work well However, they are quite expensive, so would probably go for Zigbee H&T sensors in the future and link to Home Assistant directly
M**S
Works Fine
The expected good quality and feel of the product. It appeared instantly once my number was changed to 3.
G**V
Accurate, WN31 sensor
Yet another accurate sensor (WN31) from Ecowitt. As far I checked spot on. -Temperature measured within 0.1C and humidity within 2%. All well within the specification. Bought this as an additional sensor for my garden, mounted in a separate solar radiation shield. For best accuracy, always mount these in effective solar radiation shields or shelters. Certainly a good product, recommended.
P**.
Easy to setup
Easy to add into an existing Ecowitt setup. Up and running in a very short time.
M**.
Funciona perfecto, muy preciso y de calidad. Fácil de configurar con la app de ecowitt
R**J
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.
W**N
This has been the best weather station I've had. It's simple and the network conneciton can be a little fiddly but overall it does the job. Recommended
G**A
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.
I**S
Ich habe mir lange überlegt, wie ich die Temp/Hym Werte der einzelnen Räume in Home Assistant erfassen kann und bin auf diese Lösung gestoßen. Der Plan war eigentlich einen Haufen von ESP-01/Wemos D1 Mini mit DHT22 auszustatten. Es hat sich herausgestellt, dass Batteriebetrieb recht kompliziert umzusetzen ist. Dazu kommt, dass WiFi (selbst das 2,4GHz, das ausschließlich unterstützt wird) eine zu geringe Reichweite hat und die Verbindung instabil ist. Die 3D-Drucker gedruckten Gehäuse wollten auch nicht so richtig gut aussehen :-) Zudem sind die ESP-01 seeeeehr zickig, was die WLAN Verbindung angeht und haben öfter Schwierigkeiten sich mit einem der WiFi Netze zu verbinden. Fragt man die Werte zu oft ab, so verfälschen die Spannungswandler/CPU (wasweißich was) durch die steigende Temperatur die Meßergebnisse. Die Shelly H&T (die Runden) melden die Werte im Batteriebetrieb nicht oft genug und sind in der Anschaffung recht teuer (die Lithium Batterie ist auch relativ teuer). Zudem haben die kein Display. Die mit dem Display habe ich gleich aufgrund des Preises verworfen. Durch Zufall habe ich die ECOWITT WH31 und GW1100 entdeckt. Das Gateway/die Sensoren haben eine ordentliche Reichweite. Die 2xAA (Hut ab, keine Lithium Batterien, sondern nur billige AA's :-) ) Zellen halten ewig. Die Änderungen der Temperatur und der Luftfeuchtigkeit werden flott erfasst, es gibt auch ein Display zum Ablesen. Das Ecowitt Gateway (GW1100) wird in Home Assistant ohne Umwege über eine Integration unterstützt. Man kann 8x von den WH31 + einen WH32 (also insgesamt 9 Sensoren) einbinden. Der Kanal (1-8) der WH31 wird mit einem Mäuse-Klavier unter der Batterieabdeckung eingestellt und wird dann auch im Display angezeigt. Ich würde das ECOWITT System aus folgenden Gründen empfehlen: - Günstiger als alternative Lösungen (z.B. Shelly H&T... na gut. Selbstbau wäre günstiger) - Einfache Einrichtung der Sensoren - Display - Lange Batterielaufzeit (mit günstigen AA-Batterien) - Hohe Reichweite (schräg durch ein Einfamilienhaus ohne Aussetzer) - Gute Home Assistant Integration (mit GW1100) - Kalibrierung der Sensoren sehr einfach in der WS View App/ Web UI - Preis Nicht falsch verstehen, ich verwende mehrere Shellies und die sind alle super. Nur für Temp/Hym ist ECOWITT als Gesamtlösung IMHO besser
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