447 US / CM Conductivity Calibration Solution

447 US / CM System for the calibration of the Neptune system are intended for calibration of the conductivity electrode for use in osmotic water. If you want to monitor the quality of osmotic water

This calibration fluid is designed to calibrate the conductivity electrode for use in osmotic water. If you want to monitor the quality of osmotic water, you need this liquid 447ms.
Do you want to monitor the quality of your sea water? In that case, you need a fluid 53 ms !