HI7031L – EC 1413 µS/cm@25°C – 500ml

virtually always fresh & no contamination risk.

TDS (total dissolved substances) solution 1382 mg / L (ppm) for calibration with certificate of analysis. Individual portions - convenient & always fresh & no contamination risk.

Standard-TDS Calibration Solution 12,41 g/L (ppt), 500 ml