HANNA HI7031L 电导率标准液 (500mL, 1413 µS/cm)

   H7031L is a premium quality 1,413 µS/cm conductivity solution standardized with a conductivity meter that has been calibrated with potassium chloride NIST 2202 SRM (Standard Reference Material) in deionized water for analytical use in accordance with ISO 3696/BS3978. Additional equipment used in preparation of the solutions include certified weight-checked balances, Class A glassware and certified thermometers.

Air tight bottle with tamper-proof seal
Ensures quality and freshness of solution

Each bottle marked with lot number and expiration date.
Hanna buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened bottle.