The CleanGrow multi-ion probe is a potentiometer reading the mV data from 6 ion selective electrodes for measuring the ion content of water for the environment and farming. This mV data needs to be entered into a calibration algorithm so the mV data can be expressed as mg/l or ppm in real terms for the user. The app does this, it communicates with the probe bluetooth 4.0 then calculates the data for the user. Without the APP the user cannot use the probe
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