Hanna HI70004P pH 4.01 Calibration Sachets (25 x 20ml)

Description

HI70004P is a quality pH 4 calibration buffer produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature controlled environment monitored with certified thermometers. Reported values are accurate to +/- 0.01 pH @ 25°C and are traceable to NIST Standard Reference Materials (SRMs).

Convenience of individual packaging
Ideal for users that do not calibrate frequently
Ideal for field use due to portability
Every pH buffer sachet is as fresh as the day it was packaged
Light block packaging prevents oxidation from UV light that could alter the buffer value
Each sachet marked with lot number and expiration date
Hanna pH buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened sachet
Color coded label for easy pH buffer value identification
Easy to identify different buffer values
Solution does not contain any dyes that may stain the reference cell of a pH electrode