Hanna conductivity solutions have the lot number and expiration date clearly marked on the label & 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.

HI7031L...
- 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

Detailed description:

- µS/cm @25°C : 1413 µS/cm