This soil moisture sensor measures the soil moisture level by capacitive sensing and not by resistance sensing like other sensors on the market. It is made of corrosion-resistant material, which gives it an excellent service life. This module contains an integrated voltage regulator, allowing an operating voltage range of 3.3 - 5.5 V. It is perfect for low-voltage MCUs, both 3.3 V and 5 V. https://elecena.pl/product/18566845/development-boards-soil-moisture-sensor-capacitive-analogue 2021-05-24 https://elecena.pl/product/18566845/development-boards-soil-moisture-sensor-capacitive-analogue 2025-02-08