AD1040 is a professional bench meter for pH, ORP (Oxidation Reduction Potential) and temperature measurements. Relative mV readings are also provided. AD1040 Professional pH-ORP-TEMP Bench Meter w/o ORP ProbeTHB 17,190.00PriceQuantity*SelectQuantity*Add to CartMain features Up to three-point calibration with seven memorized buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) and two custom buffers Calibration time-out alarm pH calibration using buffers with 0.001 resolution pH readings with manual or automatic temperature compensation Up to 50 samples for log-on-demand Two selectable alarm limits Large easy-to-read LCD showing the pH or mV and temperature simultaneously, together with graphic symbols HOLD feature to freeze the stable reading on the LCD GLP feature to view last calibration data for pH and relative mV ranges