Features:

• 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