PH meter-SX620 pen pH meter SX620 pen pH meter Product Features: the smallest thinnest shape: 148 x 29 x 14mm, electrode diameter 10mm. The best feature: automatic calibration, automatic temperature compensation, automatic shutdown, low voltage alarm, electrode failure to remind the intelligent features. . ● most convenient to use just one button: all operations. ● most reliable design: meet the IP57 waterproof rating, replaceable electrode, instrument calibration solutions, electrode soaking liquid and spare battery compartment. Acidimeter http://www.63513635.com