Regular use of Bluelab pH calibration fluid is 250 ml can increase the life and accuracy of pH meters. After cleaning, the pH meter should be calibrated with pH calibration solutions at two reference standards, pH 4.0 and 7.0. The pH measurement can be restarted immediately after calibration. Recalibration is required at each cleaning and when indicated by the meter. Bluelab products meet high laboratory standards to ensure longer life and accuracy of Bluelab meters. The pH calibration solution is required for pH measuring instruments.
