Hanna Salinity Calibration Solution - 25 Pack Hanna Salinity Calibration Solution - 25 Pack provides single-use 35.00 ppt calibration sachets for Hanna marine salinity testers and compatible salinity meters. 35.00 ppt Salinity Calibration Sachets Premium 35.00 ppt salinity calibration solution. Designed for calibration of compatible Hanna salinity testers and meters. NIST traceable for confidence in calibration quality. Single-use foil sachets help keep solution fresh until opened. Each sachet is marked with lot number and expiration date. Salinity Solution Details Part Number: HI70024P Calibration value: 35.00 ppt Pack size: 25 sachets Sachet volume: 20 mL each Use: salinity tester calibration Using Hanna Salinity Calibration Solution Open a fresh sachet, calibrate the salinity tester according to the meter instructions, and discard used solution after calibration. Do not pour used solution back into the sachet or reuse it for future calibration. What's Included 25 x 20 mL sachets of 35.00 ppt salinity calibration solution