WH51L Soil Moisture Sensor with 1m/3.28ft PVC Wire Probe, LCD Display, Needs to Pair with Wi-Fi Gateway, 915 MHz

When Pairing with
Gateway: The gateway (sold separately), such as GW1100/GW2000/GW1200, supports up to 8 channels of WH51L soil moisture sensors and displays the data on app after WI-Fi configuration. Channel names can be edited on the app.
When Pairing with Consoles: When pairing with a display console (sold separately), such as HP2550/HP2560/HP3500/WN1820/WN1821, up to 8 channels of WH51L sensors are supported and you can view soil moisture data in real-time on the Display and the console will upload the data to the Internet. Other consoles, such as WN1900/WN1910/WN1980/WN1920/WS3800/WS3900/WS6006, could be a gateway to pair with the WH51L but NOT display the data on the screen. When paired with WH0291, you only can view soil moisture data in real-time on the Display, and the WH0291 could NOT upload the data to the Internet.
Custom Mode: When the WH51L sensor is inside soil with different humidity levels, it will generate electrical signals of different intensities. The sensor will convert the electrical signals into AD values. The higher the humidity, the greater the AD value. Please refer to the user manual to get the details about how to calibrate the WH51L.
Note Before Purchase: WH51L and WH51 share the same 8 channels of Soil on the system. When placing the WH51L, it is highly recommended that the WH51L's body had better be placed at least 20cm higher than the surface of the soil. If the device's body is very close to the surface, RF would decline, which might affect the transmission of the data.