GroLine pH 401 Buffer Sachets 20 mL (25 pcs)

HI70004G is a high quality pH 4.01 calibration buffer designed with hydroponics, aquaponics, and greenhouses in mind. Single-use sachets are highly portable, with a small footprint and a lightweight design. They are the perfect accessory for your on-the-go testing, fitting easily into your pocket or carrying case. Supplied with Certificate of AnalysisSingle-use sachets for convenience.Perfect for use with GroLine testers and portable meters! HI70004G is a high quality pH 4.01 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 +/- 0.02 pH @ 25C and are traceable to NIST Standard Reference Materials (SRMs). Each sealed sachet holds just the right amount of solution making every sachet as fresh as the day it was packaged!Solution does not contain any dyes that may stain the reference cell of a pH electrode.Light block foil packagingLight-tight packet helps to prevent against degradation by UV light.One-time use sachet packetsEnsures quality and freshness of solution.Each sachet marked with lot number and expiration dateMany Hanna solutions are specially formulated to have an expiration of 5 years from manufacture for an unopened sachet.The HI70004G is supplied with Certificate of AnalysisProduct codeLot numberMean lot valueSRMs that were usedManufacturing dateExpiration date