Hanna Instruments pH 4.01 Calibration Solution, 500 mL Lumen & Light Meters Do not apply during the

Do not apply during the hot part of the day

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Hanna Instruments pH 4.01 Calibration Solution, 500 mL Lumen & Light Meters Do not apply during theThis buffer value is widely used in water purification plants, in the food industry, and wherever the pH is expected to be slightly acidic Hanna Instruments ph 4 Buffer Specs: Traceable to NIST standards Available in bottles or sealed sachets, complete with or without a certificate of analysis Multiple resolutions for better accuracy NIST Traceability Standardized using a pH meter calibrated by means of two standard solutions prepared from NIST