Solution for calibrating at 35.00ppt the HI98319 salinity tester. Hi70024P is a high quality 35.00 ppt salinity calibration solution, This calibration solution has been standardized with a reference conductivity meter (calibrated with potassium chloride NIST 2202 SRM (standard reference material) in deionized water for analytical use according to ISO 3696/BS3978).