Ambient Weather WH31SM Soil Moisture Sensor for WS-2000, WS-5000 Weather Stations

This sensor was easy to add to my system. The test the instructions recommended showed the calibration was correct out of the box. I have no way to confirm its accuracy in the ground, but the readings seem reasonable. In any case, I believe it will help me determine how often I should water my avocados!

I have been enjoying my WS-2000 weather station for several years and love being able to get real-time data happening right in my own backyard. I recently discovered the soil sensors available as an accessory. This has been an great addition to my weather station and lets me monitor my vegetable garden and newly planted tree right from my kitchen to be sure both are being adequately watered. You can even set up text alerts to notify when levels drop to specified parameters.

I ordered 4. 3 worked. I requested a replacement for the one that didn't work and Amazon quickly replaced it. If you buy these, I strongly suggest you test them immediately as directed by the manual. You'll know if it works and be able to replace it if necessary.The ones that work seem to work well. They report the soil moisture level back to my WS-2000, website and app. Very helpful info to have.

I use this out in our landscape area near our pond area and it gives me a fairly accurate measurement of the soil moisture to allow me to adjust my automatic watering system.

Really like my WS-2000 weather station. I have four add-on temperature sensors for various rooms including garage and basement. All Great - use the Ambient Weather app to keep track of the house when I am away. Thought moisture sensors would be a great addition to guide the use of my wifi enable irrigation controller. I purchased two WH31SM - Wish I had read the reviews first. First one passed the calibration test but was VERY slow to respond to change from dry to wet (water emersion). It then took three days to return to a more normal dry reading when removed from the water. The second one failed the initial calibration (water emersion) test never getting above 40% after repeated dry-wet cycles Very disappointed and will return. I really wanted them to work!

Crazy accurate. Took a chance, purchased 2 for garden, works so well purchased 2 more.

We have not had rain for a month and even after calibrating it, my gauge still reads 22%. When I water my garden it goes up to 35%, so I am not sure how accurate it is. Will keep experimenting with it, as the rest of the Ambient system works great and I am very happy with it.

Outstanding