This competitively-priced, dual channel and dual display pH/DO meter is easy to set up and use while providing reliable measurement of pH and dissolved oxygen for water testing applications. Easy to use 3-button function. Bright LCD display with ready indication. The rugged meter features enhanced stability indicators, salinity correction and automatic barometric pressure compensation and offers a full complement of GLP-related features-including available 21 CFR Part 11 software option. Selectable 1 to 5 point pH calibration ensures accuracy even at extremes of concentration; dissolved oxygen calibration to the Winkler Titration improves accuracy by direct measurement of O2 concentration rather than inferring the concentration from temperature and pressure. SMART STABILITY™ and SMART AVERAGING™ functions simplify the measurement process. You can record and store up to 10 setup parameters and calibrations and download additional methods and software updates via the Web. Uses polarographic DO probe; IP54 dustproof and splash proof; BNC pH electrode and mini DIN locking DO probe connectors; automatic or manual pH calibration with 1 to 5 calibration points; recognizes NIST, US and manual buffers; advanced self-tests on meter operation, self-diagnostics; GLP IQ/OQ documentation included; 200 point datalogger which is downloadable to printer or computer via an optional RS232 or USB interface accessory; CE, CSA, UL, TÜV and FCC Class A limits approved; universal power adapter for worldwide operation; three-year replacement warranty. Complete application kits including the meter, electrode, standards, solutions and accessories are available for your convenience. pH/DO Meter Kit includes: 4-Star pH/DO Benchtop Meter; ROSS Ultra® pH electrode; Epoxy ATC Probe (A Series); DO Probe (3m cable); Overflow funnel w/ stir box; Probe Service Kit; DO cal sleeve (A probes); pH 4.01, 7.00 and 10.01 Buffers (475 mL). Specifications: Range: pH: -2.000 to 19.000, mV / ORP: ± 1999.9, Temp: -5 to 105° C, % Saturation: 0.0 to 600%, DO: 0.00 to 90.00 mg/L, Salinity Factor: 0 to 45 ppt, Barometric Pressure: 450 to 850 mm Hg. Resolution/Accuracy: pH: 0.1/ 0.01/ 0.001 (± 0.002), mV / ORP: 0.1 / ± 0.2 mV, DO: 0.2 mg/L.