This Crowtail Moisture sensor uses the two probes to pass current through the soil, and then it reads then resistance to get the moisture level. More water makes the soil conduct electricity more easily (less resistance), while dry soil conducts electrici https://elecena.pl/product/6057165/crowtail-moisture-sensor-2-0 2016-05-07 https://elecena.pl/product/6057165/crowtail-moisture-sensor-2-0 2025-12-17