ECOWITT WH51 Soil Moisture Sensor Soil Humidity Tester - Accessory Only, Can Not Be Used Alone
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Availability:
20 left in stock
Arrives
Sunday, Sep 27
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Color: WH51B
Features
- Reliable Wireless Soil Moisture Sensor: Equipped with advanced chip, ECOWITT WH51 wireless soil moisture sensor collect soil moisture data within 72 seconds when totally inserted into the soil. The data can be transmitted via GW1000/GW1100 Wi-Fi gateway( sold separately ) and the live data can be viewed on WS View Plus or Ecowitt APP after Wi-Fi configuration done.
- Support Pairing with Various Ecowitt Gateway/Consoles: The GW1100 Gateway(sold separately) supports up to 8 WH51 Soil Moisture Sensors, and the channel name can be edited. When paired with a Weather Station Console (HP2551/HP3500/HP3501), up to 8 channels WH51 sensors supported and you can view soil moisture data in real-time on the Display. When paired with Console WH0291, you only can view soil moisture data in real-time on the Display.
- Uploading to Ecowitt Weather Server: Supports uploading to our free Ecowitt weather server(ecowitt.net) to view the soil moisture data graph and download the history records on the website; support setting and receiving email alerts from the server; channel names can be edited on the website; supports remote monitoring with smart phone, laptop, or computer by visiting the website.
- Indoor & Outdoor Use: The IP66 waterproof moisture sensor can be used for indoor & outdoor potted plants, lawn, garden, farm etc. Please Note : ecowitt WH51 soil moisture sensor is designed to measure soil moisture ONLY. Do not touch the stone or hard rock soil.
- NOTE BEFORE PURCHASE: Ecowitt WH51 soil moisture sensor could not directly display the soil humidity readout, which can not be used alone. North America:915MHz; Europe:868MHz; Other areas: 433MHz
Description
If you own an ecowitt IoT gateway, such as the GW1200/GW2000 or an IoT console, and an IoT sub-device, such as the WFC01 watering timer or AC1100 smart outlet plug, you own an ecowitt IoT system. After setting, other ecowitt sensors' data can be used as trigger conditions to control your IoT device.
Color: WH51B
Brand: ECOWITT
Mounting Type: Insert into Soil
Number of Items: 1
Manufacturer: ECOWITT
Mounting Type: Insert into Soil
Color: WH51B
Brand Name: ECOWITT
Number of Items: 1
Manufacturer: ECOWITT
UPC: 711639641259
Unit Count: 1 Count
Number of Packs: 1
Model: WH51B
Part Number: WH51B
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Sep 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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🚀 Abunda's Overview
This is our summary and key points to consider based on customer reviews.
The product in question is greatly appreciated for its reliability and consistency in monitoring soil moisture, ranging from simple gardening needs to complex tasks like home foundation management. Many users praise its extensive range and responsiveness to changes in moisture levels. However, some customers have pointed out minor flaws such as the blinking status light, limitations of the app, and slight inconsistencies among different units.
Pros
- 🏡 Reliable and consistent moisture readings
- 🎯 Provides real-time data
- 🌐 Has an impressive range for device connection
- 🛠 Versatile skin for numerous applications
- 🎁 Simple set-up process
Cons
- 🚦 Some found the blinking status light troublesome
- 📱 App could be improved for better user experience
- ⛔ A few units may have slight accuracy issues
- 💾 Lack of data export option
Should I Buy It?
If you need a functional, reliable and versatile device to help manage your watering, this product is worth considering. Despite minor cons regarding the app and some slight inconsistencies, it seems to get the job done effectively and its easy-to-use nature only enhances its appeal.
Color: WH51B
I use these soil meters to feed soil moisture values into my B-Hyve irrigation controllers via Home Assistant automations. The Ecowitt Home Assistant integration reads the soil moisture values, then feeds them to the B-Hyve integration to update the current estimated soil moisture with a real-time value. This helps to moderate how often the B-Hyve waters the different zones. They are not the cheapest of products, but they help reduce water use, so the upfront cost saves me money in the long term. Setup is very easy: set the Ecowitt application into pairing mode, insert the battery, close the lid and wait for the controller to recognize the new device. Once it is paired, put the waterproof caps in place. Make sure to dip the sensor in a glass of water when you first pair it so you get a moisture reading. After that you can install it at the desired location. The furthest sensor is 250ft from the Ecowitt hub and still gets good signal.
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Reviewed in the United States on August 26, 2026 by Alan Moore
Color: WH51B
I have tried sooooo many different moisture meters from really cheap crap with double metal rods that show light intensity, moisture, and soil pH which is always inaccurate, single metal rod by XLUX company which are very reliable and very accurate but you have to poke the soil in multiple places which damages roots, to expensive ones by Blumat that cost $90 per each meter which is way overpriced and it only shows the moisture without any graph 📈 or remote Bluetooth or Wi-Fi capabilities, and bunch of other ones that were always showing wrong readings, until someone told me to try these Ecowitt WH51 and WH51L sensors. The WH51 model is great and shows moisture levels from the top 7 inches of soil which is great for all types of pots up to 7 to 10 gallons. You can and should also buy their Wi-Fi Gateway that gives you access to the moisture meter data from anywhere in the world and it comes with graphs that show previous days, weeks, months readings that you can compare and dial in your watering habits for better performance. You can add up to 8 devices per each GW1100 Wi-Fi Gateway and it comes with an app, as well as their website and you can set up alerts to come in through the app, as well as get an email alert when soil goes below your indicated level which is very very useful. Now when it comes to raised beds and 20+ gallon containers I had to purchase the WH51L model which comes with a probe attached to 1 meter long cable which allows you to use them in deep pots/beds/containers and they can also be connected to the same GW1100 Wi-Fi Gateway. The WH51L model had just came out 2 weeks ago and is only available on Ecowitt's site, but I was able to buy them 2 weeks prior to them being available for sale and it turns out both of these models are very accurate. The Wi-Fi gateway also has a temperature and humidity and pressure sensor which gives you readings of the room where the gateway is located. I plugged in mine inside my grow room next to my grow tents to monitor the temperature and humidity inside that room to make sure my grow tents are in an optimal environment. I can't say enough good things about Ecowitt! Customer service is very helpful and very responsive. The only thing I did not like is that they are based in China and you can't really call them and the only method of communication is via email but like I said they are very helpful and responsive, however, they'll respond within 24 hours. If you haven't tried this company yet, then don't waste your money on anything else and do yourself a favor get this Wi-Fi Gateway along with the moisture meters because you won't be disappointed. I was very surprised that they are very inexpensive in comparison to other meters who have half the functions or even quarter functions and work so great and the battery lasts way over a year. I mean when comparing to the Blumat meter that cost $90 it's like comparing apples to oranges because for $90 it should be able to do more, at least have remote capability but it doesn't even have that option. In my opinion it's extremely overpriced and these Ecowitt devices without a doubt are blowing away Blumat meters. I hope this helps 🪴🪴 UPDATE: It's been 1.5 years since I got these sensors and the batteries gone from 1.6v power which is completely full batteries to now 1.5v and a couple of them at 1.4v which is almost full and still at 90% capacity. I haven't disconnected the batteries once and I use them continuously cycle after cycle and the only thing I do is I rinse them in between cycles and then insert them into the new container and change the name in the app and voila. Just amazing! 🤩
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Reviewed in the United States on November 26, 2023 by Intrepid Solutions
Color: WH51B
These little sensors are awesome. I use them to help me determine when I need to water my lawn vs just running things on a set schedule. I find they're pretty consistent across the handful of sensors I have. They're also great on batteries, I'm using a mix of lithium (not rechargeable) and rechargeable NiMH batteries in them and they both seem to work well and have lasted most of the season without needing a replacement. I don't trust alkalines to not leak, but they would work fine too. The one criticism I may have is that they are fragile, if you accidentally kick or step on them they will snap at the interface of the body and electrodes and require replacement. My clumsy self has destroyed a couple of them. In a planter or vase or whatever, you would never run into issues, however I think there's probably a way to design them to be "safer" and less prone to breakage in a lawn or garden bed that would have someone walking around, with a flexible material at the interface of the body and electrodes. They would be 5 stars if not for this small issue you may never run into. I don't seem to have any connection issues and they show up consistently in my ecowitt app. They just "pair" quickly and easily and the signal seems pretty strong. Their overall design is nice and they don't look out of place in a lawn or garden, really. The weather caps seem to keep any water intrusion out and they have been outside in downpours with no issues.
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Reviewed in the United States on September 19, 2025 by c.c reviews
Color: WH51B
This device works great! I push it into the soil in the middle of our 24x24 foot vegetable garden, then place a stake with a little red flag on it next to the sensor so I can find it easily. I monitor it from the HomeAssistant MQTT integration and this sensor communicates with the HA server inside the house about one hundred feet away. This is the second year using it and I'm still on the original AA battery. Through observation of the readings from dry soil and wet soil that it reads between 30% to 55%. We tend to turn the sprinkler on when the sensor reports lower than 35%.
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Reviewed in the United States on July 13, 2026 by John T
Color: WH51B
Update Aug 2026: 3 more failed sensors. I've now had 9 out of 16 sensors fail in the first or second season. These should be considered single season devices, which makes them very expensive. I wish there was a better option that is home assistant or hubitat compatible, but I've yet to find it. JUNE 2026 Over the past year, I have purchased almost every weather and soil-related device Ecowitt makes. For the most part, I really like their products. (Don't bother with the lightning sensor though). They are priced reasonably and work well, putting them in a sweet spot between very expensive prosumer gear and total junk. I have their WS90 "hub" that provides several measurements, along with a separate rain gauge, several temp/humidity gauges, a soil temp gauge, a water timer/valve, and notably, 16 soil moisture sensors. I also have their best display console (very nice but over-priced) and a GW3000 gateway. I'm now on my second summer season with the soil sensors - and I've had 6 of 16 fail. Ecowitt support has been good- they eventually replaced them (I've got one pending right now), but it takes some back and forth, and of course, time without a working sensor. I also had the GW3000 fail (Wifi connection stopped working) and the WFC01 water timer/valve flow dropped to almost half, despite following their very complex instructions to dismantle the valve workings and clean it out. To their credit, they have replaced everything that has failed, but not without a considerable amount of time-wasting back and forth. I still think their product line is good and for the most part fairly priced - but that is based on an assumption of reasonable durability. All of the failures I've had have been at just over a year - still within warranty. But if I end up having to replace a lot of things at my cost next year, when they're out of warranty, the value/price ratio is going to drop fast. Last summer I would have rated every product (except the lightning sensor) an enthusiastic 5 stars. I still think performance is excellent but I have growing concerns about durability.
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Reviewed in the United States on July 15, 2026 by Michael
Color: WH51B
I have five of these operating around my home. I live in an area with extremely poor soil conditions that subject my slab-on-grade home to extreme foundation movement if I don’t keep soil moisture consistent season to season. During long, hot summers my soil dries out and causes my foundation to shift dramatically. I bought a couple of these sensors in late summer 2019 to gauge long-term trends to determine ideal soil moisture conditions. After a year of gathering data, I found a good range for soil moisture to minimize foundation movement. I purchased three more (and a WN51) to stake along the perimeter of my home to monitor my soil moisture in real time. By getting this data I’m able to determine when I need to run the soaker hose and irrigation system around my home. While my foundation still moves, I’ve noticed a dramatic difference associated with keeping soil moisture levels within 5-7% of their target. I realize this might not be the targeted use of these devices, but I believe their reliability in my application serves a ringing endorsement for others looking to monitor the moisture levels in their planters in real time. The user interface is average. The app, without a full PWS, seems less than functional. I almost prefer the web-version to the app because it only shows me the active data. This, ultimately isn’t too important to me. If I could export daily data as a .csv, I’d like that ability but it’s not a deal breaker as my primary use is observation of long-term trends. For those with privacy concerns, it’s easily addressed by connected the hub to the internet via a secured guest network. If you’re not already running all of your smart devices on their own secured network away from personal devices, I suggest you do so. I’ve got a couple notes for prospective buyers: 1) I think I prefer this model (WH51) over a similar moisture meter (WN51) made by Ecowitt. These seem more granular in their ability to notice subtle differences in moisture and react much faster to changes in moisture levels. 2) Use a good lithium ion battery. At least two of my sensors have functioned for almost a year without needing to change a battery. They’ve operated in temps from 20-110F. 3) Spend 5 minutes calibrating your devices to the type of soil where the meter will be placed. Mine are primarily in Texas black clay and they require some calibrating tweaking from default. Also, in relation to the first point, the WH51 seems to have a much larger range from 0-100% saturation than the WN51. No clue why, but I like the more precise ability to measure incremental changes in moisture. I’ll update my review over time with any additional notes or issues that may arise.
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Reviewed in the United States on August 15, 2020 by IEF89
Color: WH51B
Drastically reduced my water usage and helped my garden grow better. Once the rubber caps are in place they seem highly durable, I've had no issues in 6 months now. Each and every one of the 14 I am using seemed to be calibrated correctly out of the box. I'm very happy they raised the limit from 8 sensors to 16 on my Wittboy. Home Assistant via MQTT connectivity allows me to program complex watering procedures using these sensors with LinkTap and Garden In Minutes grids.
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Reviewed in the United States on July 3, 2026 by Theicom
Color: WH51B
Amazing little sensor, battery lasts forever. People say it needs calibration, I've used it out of the box and ran some dry/wet tests to know what min/max values look and was comfortable with it. I use it everyday to my row of podocarpus shrubs don't get wet feet or dry, but keep it moist at all times. This did the trick.
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Reviewed in the United States on June 9, 2026 by VP