Regular use of Bluelab pH calibration fluid is 250 ml (4.0 / 7.0) can increase the life and accuracy of pH meters. After cleaning, the pH meter should be calibrated with pH calibration solutions on two reference standards. The pH measurement can be restarted immediately after calibration. Recalibration is required at each cleaning. Bluelab products meet high laboratory standards to ensure longer life and accuracy of Bluelab meters.
According to reference standard
Bluelab pH calibration fluid is 250 ml (4.0 / 7.0) reviews
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