Basic Lab Benchtop pH Meter mV Tester-- Digital Acidity Meter with Temperature Compensation Difference: The difference is from the accuracy from pH and mV Description and Feature: Classic laboratory PH meter, 1-3 point calibration, manual temperature compensation LCD large screen display, beautiful appearance It is suitable for measuring the acidity (pH value) and electrode potential (mV) of the solution in the laboratory. The measurement is stable and accurate. Widely used in teaching, water quality monitoring, chemical experiments, quality monitoring, routine experiments, etc. Parameter: PHS-3C: pH measurement range: 0.00-14.00pH pH measurement accuracy: ±0.01pH Resolution: 0.01pH mV measurement range: 0-±1999mV Resolution: 1mV Temperature compensation: 0-60 ° C Standard buffer solution: pH 4.00; pH 6.86; pH 9.18 Product size: 220*200*85mm Weight: 1kg PHS-2C: pH measurement range: 0.00-14.00pH pH measurement accuracy: ±0.02pH Resolution: 0.01pH mV measurement range: 0-±1999mV mV measurement accuracy: ±10mV Resolution: 1mV Temperature compensation: 0-60 ° C Standard buffer solution: pH 4.00; pH 6.86; pH 9.18 Product size: 220*200*85mm Weight: 1kg PHS-25: pH measurement range: 0.00-14.00pH pH measurement accuracy: ±0.05pH Resolution: 0.01pH mV measurement range: 0-±1999mV mV measurement accuracy: ±10mV Resolution: 1mV Temperature compensation: 0-60 ° C Standard buffer solution: pH 4.00; pH 6.86; pH 9.18 Product size: 220*200*85mm Weight: 1kg Package including: 1 x Set of Lab Benchtop pH Meter(do not include Experiment cup)