... -Buffer Recognition * Adjustable NIST or USA Standards * Accuracy: 0.01pH PHS-3CW digital pH meter is an easy-use basic pH ... used for measuring the acidity, alkalinity of liquids.Automatic Calibration:PHS-3CW meter is capable of calibrating up to 3 points ... : pH Electrode (Made in UK), Standard pH Buffer, Power Adapters PHS-3CW Digital pH Meter (Using the British pH Electrode, CE ...