• Backlit, graphic LCD display can show each parameter with temperature individually, or all three with temperature on one screen. Additional icons include electrode status, time, date, sample ID, user ID and calibration points.
• AUTO-READ™ locks in the stable reading on your screen.
• Rugged and dependable.
• Ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals.
• Up to 5 point pH calibration with automatic recognition for USA/NIST and DIN buffers.
• Calibration editing allows the user to fix pH and ISE calibration errors without a complete recalibration.
• Non-volatile memory holds up to 5000 data points with time and date stamp.
• No need to worry about DO probe compatibility - meter accepts and automatically recognizes Orion polarographic and RDO optical/luminescence-based probes.
• DO results with ATC, automatic/manual barometric pressure and automatic salinity compensation when used simultaneously with conductivity.
• Calibrate for DO using water-saturated air, air-saturated water, a Winkler titration or zero-point calibration.
• Selectable cell constant allows for use with 2- or 4-cell conductivity cells.
• For advanced accuracy in conductivity readings, selectable reading reference temperatures of 5, 10, 15, 20 or 25ºC with linear, non-linear, nLFu or EP curve options.
• Multilingual interface supports English, Spanish, French, Italian, German and Chinese.
• USB and RS232 ports, and complimentary data analysis software.
• Four x AA batteries (included) provide over 800 hours of operation. Optional AC adapter available (sold separately).
• Waterproof, IP67-rated housing.
• Warranty: 3 year meter replacement warranty.


Specifications:
• pH range: -2.000 to 20.000 ±0.002 pH.
• mV/RmV range: ±2000.0mV ±0.2mV or ±0.05% of reading, whichever is greater.
• ISE range: 0 to 19,999 ±0.2mV or ±0.05% of reading, whichever is greater.
• ISE units: ppm, M, mg/L, %, ppb, none.
• ISE calibration features: Up to 5-point calibration with timed end point, linear point to point, non-linear selectable auto-blank low concentration range stability.
• Conductivity range: 0.001µS to 3000mS. Accuracy: 0.5% of reading ±1 digit.
• Conductivity calibration: up to 5-points.
• Resistivity range: 2 to 100M . Accuracy: 0.5% of reading ± 1 digit.
• Salinity type: Practical salinity or natural sea water.
• Salinity range: 0.01 to 80.0 ppt NaCl equivalent; 0.01 to 42 ppt practical salinity. Accuracy: ±0.1.
• TDS range: 0 to 200 ppt. Accuracy: ±0.5% of reading ± 1 digit.
• Dissolved oxygen: Concentration RDO range: 0 to 50 mg/L.
• Temperature range: -5 to 105ºC (23 to 221ºF) ±0.1.
• Inputs (pH electrode): BNC, reference pin; (Conductivity with temperature probe or ATC probe): 8-pin mini-DIN.
• Output: RS232, USB.

NOTE: Kit (Cat. #639-890-04) includes the following: ROSS Triode 3-in-1 pH/ATC probe (3m cable), DuraProbe conductivity cell (3m cable), RDO optical/luminescence-based probe with 3m cable, stainless steel guard, calibration sleeve and optical/luminescence-based cap, pH 4.01, 7.00 and 10.01 buffers (10 pouches of each), ROSS electrode storage solution (475ml), 1413µS conductivity standard (10 pouches), Rinse solution (10 pouches), Protective armor with probe holders, hard carrying case and four x AA batteries.