Review on REOTEMP 24 Inch Garden And Compost Moisture Meter, Garden Tool Ideal For Soil, Plant, Farm And Lawn Moisture Testing by Christopher Hicks

I got tired of the always break Home Depot/Lowes models made in China. This is made by Reotemp a high end industrial supplier based out of California. They sell more robust version of this product which I think are made in the USA. This one was made in communist china. I took it apart and while the quality of the components was pretty good, the mfg was not and the calibration screw was not mounted properly but I could still access it and use it. These device use galvanic current action which trips a electromagnet and requires a coarse calibration to use. The Calibration directions are not correct. You should use a two point calibration. First stick the device in water and make sure it reads above full scale and the meter is pegged. Next take a known soil source that you have water thoroughly, such as a pot you have dripped through thoroughly and is truly wet. Then stick the probe in and make sure it reads full scale by adjusting the calibration screw if required. Then take some dry potting soil or other very dry soil and make sure it reads near zero. The mfg sells direct to the public and has wireless versions. These are primarily used, I think for testing commercial compost piles although those use a longer probe. You cant keep this out 24/7 but you can check your compost soil and most soil. The case and probe are pretty rugged but your not going to be able to use it to check hard clay soil due to the fragile electromagnetic. I use it for checking my compost pile but mainly for checking the 200 or so potted plants and numerous garden beds that use compost based soil. You should be aware if you have salty soil this probe will read a higher water content than you have. Real moisture sensors are called tensiometers and cost hundreds of dollars. This is a deal for 35 dollars and the quality should give you a decade or more of use if you don't pound it into the soil. Infinitely better than the made in china garbage you can get at Home Depot or most gardening stores which simply does not work well and dies in short order.