WH31SM

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.

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

Does a good job I just wish the connection was a little stronger to go farther away from the base unit

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!

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!

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.

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.

Highly recommended this product for people who like to monitor the weather condition around their home. I currently am using this product for my garden to see how it reports in the winter and seems accurate except with the temperature dropping below freezing making it read dry but it’s frozen which is understandable. Would highly recommend to everyone with the WS-2000