This waterproof, battery-operated conductivity meter stands up to the most demanding soil and water analysis applications and delivers over 2,000 hours of continuous operation. Easy to use 3-button function. Bright LCD display with ready indication. Automatic or manual temperature compensation. Meets all U.S. Pharmacopeia (USP) requirements. Convenient Quick-Start Guide is located on the back of the meter to make the unit easy to operate in the field. In addition to pH, the rugged meter displays conductivity, resistivity, salinity, TDS and temperature measurements and offers a full complement of GLP-related features-including available 21 CFR Part 11 software option. It accepts both 4-electrode and 2-electrode cells. SMART STABILITYTM and SMART AVERAGINGTM functions simplify the measurement process. You can record and store up to 10 setup parameters and calibrations-a valuable feature for multi-user labs. Download additional methods and software updates via the Web. : IP67 waterproof (may be immersed for up to one hour with no water incursion); waterproof BNC pH electrode and waterproof mini DIN locking conductivity probe connectors; automatic or manual pH calibration with 1 to 5 calibration points; auto-buffer-recognition of NIST/US and DIN buffers; automatic or manual temperature compensation; self-diagnostics; GLP IQ/OQ included; 200 point datalogger which is downloadable to printer or computer via RS232 connection; optional USB outputs; CE, CSA, UL, TÜV and FCC Class A limits approved; universal power adapter for worldwide operation; three-year replacement warranty. Specifications: pH: -2.000 to 19.000, Resolution/Accuracy: 0.1/ 0.01/ 0.001 (± 0.002). mV / ORP: ± 1999.9, Resolution/Accuracy: 0.1 / ± 0.2 mV. Temp: -5 to 105° C. Conductivity: 0 to 3000 µS. Cell Constant Range: 0.001 to 199.9. Salinity: 0.01 to 80.0 ppt NaCl. TDS: 0.0 to 19,999.0 mg/L. Resistivity: 0.0001 to 100 Megohms. Reference Temp. (C): 15 , 20 , 25, autoranging.