HI7031-023 is a GroLine 1,413 ????_????S/cm conductivity standard that is prepared against a NIST traceable potassium chloride solution and supplied with a certificate of analysis. Hanna conductivity solutions have the lot number and expiration date clearly marked on the label and are air tight with a tamper-proof seal to ensure the quality of the solution. Hanna's line of conductivity standards have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened bottle.
- Supplied with Certificate of Analysis
- Temperature chart of the actual ????_????S/cm value at various temperatures printed on each bottle
- Air tight bottle with tamper-proof seal to ensure quality