CS-AD1000 is a professional bench meter for pH, ORP (Oxidation Reduction Potential), and temperature measurements. Relative mV readings are also provided. Main Features of this Product Include: -Up to 5-point calibration with 7 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 reading with manual or automatic temperature compensation -Log-on-demand (up to 50 samples) and automatic logging (up to 1000 samples) -Two selectable alarm limits -User selectable logging interval mode -Connection to an external serial printer with the following specifications: -at least 16 characters/line -baud rate 9600 -9-pin RS232 input -Large easy-to-read LCD showing pH or mV and temperature readings 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 -PC interface