zobeen Analog Capacitive Soil Moisture Sensor V1.2 Corrosion Resistant

in this tutorial I'm going to teach you how to read a capacitive soil moisture sensor for this tutorial you need an Arduino a capacitive soil moisture sensor a sensor cable, 3 jumper wires male-male and a glass of water before we're going to build the circuit I would like to show you how our moist sensor works one of the sensors used is this one it consists of two pins and you see also some kind of metal on top of it what this sensor does is it measures the resistance between these two pins how this works is that water changes the resistance and so you can measure the amount of moist in our soil problem is that fertiliser also changes the resistance so you cannot be absolutely sure that you're measuring the water another problem is corrosion this is a sensor used for some time what happens is that the DC current reacts with water and make this sensor oxidise so as you can see you can