Description One set of packets – pH 4.0, pH 7.0 & pH 10.0 PINPOINT? High-Precision pH Calibration Fluids come in plastic envelope packets and are extremely accurate and field portable. Each packet contains ample fluid for calibration (about 30 ml). All electronic pH instruments should be calibrated monthly. High or low range available. Available in 4.0, 7.0 or 10.0 individually also.
