6.44 ppt TDS Calibration Solution

The 6.44 ppt (parts per thousand) TDS calibration solution is the high-range reference standard for TDS meters used in saline, brackish water, and seawater-equivalent measurement applications. While the 1382 ppm (mg/L) solution serves the low-to-mid range fresh water segment, this 6.44 ppt solution is the correct calibration reference for instruments measuring salinity, high-dissolved-solids process water, aquaculture seawater systems, desalination monitoring, and marine or estuary water quality applications.