HI7031-023 is a GroLine 1, 413 µS/cm conductivity standard prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis. Hanna conductivity solutions are airtight with a tamperproof seal to ensure the quality of the solution. Each bottle is clearly marked with the lot number and expiration date. Hanna’s line of conductivity standards is specially formulated to be valid for 5 years from the date of manufacture for an unopened bottle

• Supplied with Certificate of Analysis

• Temperature chart of the actual µS/cm value at various temperatures printed on each bottle
• Air tight bottle with tamper-proof seal to ensure quality