The CTgrow EC (Electrical Conductivity) sensor probe is a crucial component of the HYD-2/4 Pro+ hydroponic sensing units, as it measures the electrical conductivity of the nutrient solution. Electrical conductivity is a measure of the solution's ability to conduct an electrical current, which is directly related to the concentration of dissolved salts and minerals in the solution. The higher the concentration, the higher the electrical conductivity.

The EC sensor probe consists of two electrodes that are placed in the nutrient solution. An electrical current is applied between the two electrodes, and the resistance to the current is measured. The resistance is then used to calculate the electrical conductivity of the solution, which is sent as an electrical signal to the HYD-2/4 Pro+ unit for processing and monitoring.

CTgrow's EC ezo circuits are needed to ensure that the EC sensor is properly calibrated and compatible with the HYD-2/4 Pro+ units, providing accurate and reliable EC measurement data. With this information, hydroponic growers can adjust the nutrient solution's concentration of salts and minerals for optimal plant growth and health.