Details Alat Ukur Kalibrasi HI7004M is a premium quality pH 4.01 calibration solution. 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 @ 25C and are traceable to NIST Standard Reference Materials (SRMs). 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. 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 Specifications Accuracy Standard 0.01 pH pH Value @25C 4.01 Package bottles Size 230 mL Quantity 1 Certificate of Analysis No . .
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