--- product_id: 419747720 title: "ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone" brand: "ecowitt" price: "¥18859" currency: JPY in_stock: true reviews_count: 5 category: "Ecowitt" url: https://www.desertcart.jp/products/419747720-ecowitt-wh51-soil-moisture-sensor-max-8-channels-soil-humidity store_origin: JP region: Japan --- # 8-channel multi-sensor support 72s fast wireless data IP66 waterproof rating ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone **Brand:** ecowitt **Price:** ¥18859 **Availability:** ✅ In Stock ## Summary > 🌱 Stay ahead of the drought curve with precision soil insights! ## Quick Answers - **What is this?** ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone by ecowitt - **How much does it cost?** ¥18859 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/419747720-ecowitt-wh51-soil-moisture-sensor-max-8-channels-soil-humidity) ## Best For - ecowitt enthusiasts ## Why This Product - Trusted ecowitt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable All-Weather Design:** IP66 waterproof sensor built for both indoor and outdoor use, from potted plants to large farms. - • **Rapid Wireless Soil Sensing:** Get precise soil moisture data in just 72 seconds for smarter watering decisions. - • **Real-Time Remote Monitoring:** View live soil moisture stats anytime via Ecowitt APP or web portal—stay connected wherever you are. - • **Smart Alerts & Historical Data:** Receive email notifications and access detailed moisture history to optimize plant health and water usage. - • **Seamless Multi-Channel Integration:** Supports up to 8 sensors on a single gateway for comprehensive soil monitoring. ## Overview The ECOWITT WH51 is a wireless soil moisture sensor designed for accurate, rapid soil humidity measurement. Compatible with Ecowitt gateways and consoles, it supports up to 8 sensors per gateway, enabling real-time remote monitoring via app or web. Its IP66 waterproof rating ensures reliable indoor/outdoor use, making it ideal for gardens, farms, and potted plants. Note: Requires a compatible gateway for data display and cannot be used standalone. ## Description Ecowitt WH51 Soil Moisture Sensor measures soil moisture content quick and accurate. The data can be accepted by GW1100 Wi-Fi Gateway(sold separately) and can be viewed on our WS View/Ecowitt APP after the Wi-Fi configuration done. Review: Excellent ! - Je cherchais un Testeur d'humidité du sol efficace et pas trop cher et je suis vraiment enchanté par ce produit. Extrêmement facile à paramétrer, en 10 minutes j’avais installé le module wifi et la sonde qui donnait 0% dans l’air et 100% dans un verre d’eau. L’idée pour moi est de surveiller l’arrosage d’une haie et on voit parfaitement l’arrosage automatique à 6H du matin et le retour à la normal le long de la journée. Rien à dire de négatif. Review: Dobry sensor bezprzewodowy - Sensor łączy się nie tylko z dedykowaną bramką WiFi. Połączył się z moją stacją sbs-ws-500 i dobrze pokazuje wilgotność gleby w ogrodzie. Wskazania mogę obserwować zarówno na stacji jak i w aplikacji Ecowitt. Polecam. ## 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07JM621R3 | | Battery Description | No batteries required | | Brand | ECOWITT | | Brand Name | ECOWITT | | Colour | WH51B | | Country of Origin | USA | | Customer Reviews | 4.4 out of 5 stars 989 Reviews | | Manufacturer | ECOWITT | | Model Number | WH51B | | Mounting Type | Insert into Soil | | Number of Items | 1 | | Part Number | WH51B | | UPC | 711639641259 | | Unit Count | 1.0 Count | ## Product Details - **Battery Description:** No batteries required - **Brand:** ECOWITT - **Colour:** WH51B - **Manufacturer:** ECOWITT - **Mounting Type:** Insert into Soil ## Images ![ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone - Image 1](https://m.media-amazon.com/images/I/61JOlQodiCL.jpg) ![ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone - Image 2](https://m.media-amazon.com/images/I/51Hw4r7s4LL.jpg) ![ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone - Image 3](https://m.media-amazon.com/images/I/51p2b45T11L.jpg) ![ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone - Image 4](https://m.media-amazon.com/images/I/61AJ5wcUpxL.jpg) ![ECOWITT WH51 Soil Moisture Sensor Max 8 Channels Soil Humidity Tester - Accessory Only, Can Not Be Used Alone - Image 5](https://m.media-amazon.com/images/I/61WjI+apDBL.jpg) ## Questions & Answers **Q: Do you have wh51 transmits at 433 mhz? what would it be named? wh51a? or wh51c?** A: My WH51B devices use 914915000, or about 915Mhz. If you are trying to identify which frequency band your device is using, I couldn't do it from packaging. The best answer that I could give you is that if you bought it on Amazon with a US shipping address, then you probably got the 915 version instead of the 433 that you thought you were buying. I understand that if you need a 433, you can contact Ecowitt and they will send you one intended for another country. RTL_433 can be configured to use the 915 band, though this will mean you have two instances of RTL_433 and the sdr hardware. I do. The WH51B is not a powerful transmitter, and the receiver can't be a long distance away. I struggled with getting the WH51B to work with RTL_433, so I'll share my config: frequency 914915000 sample_rate 250000 protocol 142 report_meta time:off output mqtt:192.168.0.xxx,events=eco2mqtt[/id] If you have trouble, post in the RTL_433 github issues and someone will help. **Q: What is %ad? how does it relate to any standard measure of soil water content** A: Hi, the %ad refers to the defaut dry definition on the fixed slope rate linear system. We recommend you to have a look at the manual(you can download it on our official website) from P8-12 to understand that better. Any question, please contact us at support@ecowitt.com. **Q: Can you just leave the wh51 soil moisture sensor in the ground outdoors to constantly check the soil with the gw1000 remotely?** A: Hi, yes. The wh51 is communicating with the gw1000 via RF signal and the reporting distance is within 300feet/100m(in open area). After you finish the wifi configuration on the free WS View app with the gw1000, you can upload the data to our own weather server: ecowitt.net. Then you can remoting the data by visting the ecowitt.net website(need to add your gw1000 device on the website first). Any other question, please let us know at support@ecowitt.com.:) **Q: Can this who291 transmit to the lcd display panel and also a gw1000 wifi gateway for logging, at the same time?** A: Hi, GW1000 can accept the sensor data in the WH0291 and upload to our free weather server: ecowitt.net. So the GW1000 + WH0291 works! The WH0291 actually is the WH51 sensor with a display. Any other question, please contact us at support@ecowitt.com.:-) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent ! *by E***E on 29 April 2026* Je cherchais un Testeur d'humidité du sol efficace et pas trop cher et je suis vraiment enchanté par ce produit. Extrêmement facile à paramétrer, en 10 minutes j’avais installé le module wifi et la sonde qui donnait 0% dans l’air et 100% dans un verre d’eau. L’idée pour moi est de surveiller l’arrosage d’une haie et on voit parfaitement l’arrosage automatique à 6H du matin et le retour à la normal le long de la journée. Rien à dire de négatif. ### ⭐⭐⭐⭐⭐ Dobry sensor bezprzewodowy *by G***A on 24 May 2025* Sensor łączy się nie tylko z dedykowaną bramką WiFi. Połączył się z moją stacją sbs-ws-500 i dobrze pokazuje wilgotność gleby w ogrodzie. Wskazania mogę obserwować zarówno na stacji jak i w aplikacji Ecowitt. Polecam. ### ⭐⭐⭐⭐⭐ Removes the guesswork about when and how much to water. *by S***K on 2 August 2022* This review evaluates the “WH51 Soil Moisture Sensor” made by ECOWITT. The product was shipped with no excessive or wasteful packaging. What’s in the box: one (1) WH51 soil moisture sensor, and an owner’s manual. I will preface this review by saying that I’m a Country Boy whose entire life has revolved around flower and food gardens. Any gardener will tell you that the quality of your soil is instrumental for crop growth. I recently purchased an Ecowitt WittBoy weather station that supports a multitude of add-on sensors, this soil moisture sensor being one of them. For years I have done away without using a moisture meter due to wildly inaccurate readings I would get; so I was eager to try this unit out. First impressions: The overall quality of the meter looks very good, with a durable hard plastic ABS casing. The end cap unscrews to house an “AA” battery (not included, lithium recommended). The weatherproof end cap is further protected by a slide-on rubber cap. It is imperative to note that this is not a standalone sensor; you need an Ecowitt monitoring hub. The set-up was easy: install a new battery, open the Ecowitt APP that you set up with your monitoring hub, and add the WH51 sensor. Within a minute the sensor calibrates and sends real-time data back to you via your monitoring hub/APP. I bought this sensor to specifically monitor my hanging potted plants. I tested unit one of my pots by placing it as instructed. After acclimating (about 10-20 minutes) the sensor reported that the soil moisture content was 33%. To check the accuracy of the sensor, I installed an old-school analog probe in the same pot. After acclimating (about 10-20 minutes) the analog probe reported that the soil moisture content was 35%. The sensor appears to be accurate within reason. The WH51 sensor removes the guesswork about when and how much to water. My only suggestion to the manufacturer is to include a lug to tie a tether with a tag so that you don’t lose/forget about the sensor when you dump the pot! Since this really doesn’t take away from the usability of the product, I will not deduct any stars for it. In order to determine long-term meter durability and accuracy, I intend to monitor this product over the next 4-6 months. Should anything change over this period, I will update this review accordingly. Cost-effectiveness and value: Overall I am very satisfied with the product; it is compact, portable, and easy to use. At a current price of $32.99 (plus a $3 off coupon), it is of great value. In summary: the “WH51 Soil Moisture Sensor” made by ECOWITT is well made, compact, accurate, and easy to use. It delivers all this at a reasonably low price. This product is a must-have for the avid gardener. I would recommend this product without reservation. Pros 👍: ✔ Well made from quality materials. ✔ Very easy to set up and use. ✔ Sensor reports back every 60 seconds (as configured by your monitoring hub). ✔ Uses one (1) AA battery. ✔ IP66 water resistant rated. ✔ Removes the guesswork out of when to water. ✔ Accurate. ✔ Great price point, good value. Cons👎: ✘ None! Manufacturer Suggestions 🖐: ✔ Provide a lug to tie a tether marker to avoid loss. ## Frequently Bought Together - ECOWITT WH51 Soil Moisture Sensor Soil Humidity Tester - Accessory Only, Can Not Be Used Alone - ECOWITT Wi-Fi Gateway Weather Station, with Built-in Temperature, Humidity, and Barometric Sensors, IOT Ready, Supports Ecowitt Sensors Developed, USB Power, 915 MHz - Ecowitt GW2000 Wi-Fi Hub for Wittboy Weather Station, with Built-in on Board Barometer and Thermometer/Hygrometer Sensor, Support Ecowitt Weather Sensors --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/419747720-ecowitt-wh51-soil-moisture-sensor-max-8-channels-soil-humidity](https://www.desertcart.jp/products/419747720-ecowitt-wh51-soil-moisture-sensor-max-8-channels-soil-humidity) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-06-19*