PH4 PH7 PH10 Calibration Solution, suitable for calibrating PH meters. PH, calibration solutions are available in a variety of units such as pH 7.0, pH 4.0 and pH 10.0, When calibrating, ensure the temperature of the solution and probe are as close as possible. PH4 Formulated to provide precise pH determinations, these buffer solutions, which are standardized against N.I.S.T. certified reference samples, are ideal for calibrating electrodes and pH meters. The buffer is colour-coded to avoid error and accurate to within ±0.02 pH at 25 °C (77 °F). Each buffer contains a preservative/mould inhibitor and a coated foam liner cap to prevent contamination and leakage. Features: ---4.01pH Buffer Solution ---Stored in a lightweight HDPE plastic bottle. ---Capped with a coated foam liner. ---4 oz.
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