• Conductivity Value (µS): 1500
• +/- 1% accuracy at 25°C
• TDS values: 757.1 ppm KCI, 737.1 ppm NaCI, 1050 ppm 442
• Standardized against NIST standards, premixed, and ready to use

TDS standards in ppm KCl, NaCl, and 442 conversions are also printed on the bottle for ease of use. Temperature corrections are printed on the bottle, with the certified values listed in the tables, accurate to within ±1%, and are referenced to 25°C.

Conductivity/TDS calibration solution is freshness dated, and is standardized against NIST-traceable references to ensure accuracy of ±1% accuracy at 25°C; comes in 1-pint or 500 mL bottle; 1500 µS KCl Conductivity's equivalent TDS values: 737.1 ppm KCI, 757.1 ppm NaCI, 1050 ppm 442.