| Oakton (WD-35653-10) TDS 447 Pouches (300 PPM) 20/Box |
 Standardized against NIST standards, premixed, and ready to use. Pouch contains a solution with a TDS of 300 ppm used as a calibration solution. "Singles" are convenient for high-precision calibration on-the-go. Specifications Ideal for field calibration. NIST traceable materials. �1% accuracy at 25�C. Price: 48.20 |