What is the Ecometry nano system? Ecometry is a small digital analyzer for smartphones (Android) that allows electrical measurement of nutrients and parameters (all in one), for fresh and salt water. The Ecometry system does not require calibration, nor the addition of chemicals, and its sensors can be reused up to 50 times. Included: NH4/3 , NO2 , NO3 , PO4 , pH, salinity, TDS, EC, hardness/density.   Specific software for agriculture