Jiangsu Sheng Hua Austrian laboratory ph meter factory laboratory PH meter-wide touch-screen, personalized touch buttons function automatically recognizes standard buffers, three-point calibration temperature compensation function automatically recognizes laboratory PH meter main features: a full touch-screen Desktop acidity, personalized touch button 2, automatic identification of standard buffer function, three three-point calibration, automatic temperature compensation function identification laboratory pH meter product parameters Measuring range: pH: (- 1.99 ~ 19.99) pH mV: ± 1999 mV Accuracy: pH: ± 0.01 pH mV: ± 0.1% FS Temperature compensation range: Range: (0 ~ 100) ℃ Accuracy: ± 0.5 ℃ Dimensions: (160 × 190 × 70) mm Weight: 880g Power: DC9V / 300mA Laboratory ph meter factory More: http: //www.sahkjcod.com/products.html