Specifications HI2640 HI2641 Dissolved Oxygen Range 0.00 to 45.00 ppm (mg/L); 0.0 to 300.0 % saturation Resolution 0.01 ppm (mg/L); 0.1 % saturation Accuracy ± 1.5% of reading ±1 digit Calibration one or two-point at 0% (HI7040 solution) and 100% (in air) Temperature Compensation ATC (0 to 50°C; 32.0 to 122.0°F)* Salinity Compensation 0 to 40 g/L (with 1 g/L resolution) Pressure Compensation -500 to 4000 m (-1640 to 13120') (with 100 m (328') resolution) Temperature Range* -20.0 to 120.0°C; -4.0 to 248.0°F Resolution 0.1°C; 0.1°F Accuracy ±0.5°C; ±0.9°F Additional Specifications Probe HI764080 digital dissolved oxygen electrode with 3.5 mm (1/8”) connector and 1 m (3.3’) cable (included) Logging — up to 1000 records organized in: manual log-on-demand (max. 200 logs), manual log-on-stability (max. 200 logs), interval logging† (max. 600 samples; 100 lots) Connectivity — 1 USB-C port for PC connectivity Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing Power Supply USB Type C (5 VDC; 500 mA) USB Type C (5 VDC; 500 mA) Dimensions 205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “) Weight Approximately 850 g (1.87 lbs.) Ordering Information HI2640 Dissolved Oxygen Benchtop Meter includes HI764080 dissolved oxygen electrode, 1.5 m USB-C to C USB-C cable, quality certificates, and QR code for manual download. HI2641 Dissolved Oxygen + Logging Benchtop Meter includes HI764080 dissolved oxygen electrode, HI7041S refill electrolyte solution, DO membrane caps (2), o-rings (2), electrode holder, 1.5 m USB-C to C USB-C cable, quality certificates, and QR code for manual download. * temperature limits will be reduced to actual probe limits † standard mode only See page 6.38 for DO solutions and accessories • Clark type digital polarographic probe with easy-to-replace membrane cap · Covers all ranges from 0.00 to 45.00 mg/L (ppm); 0.0 to 300.0% saturation • Accuracy ±1.5% of reading ±1 digit • One or two-point calibration (HI7040), 0% (solution) and 100% (water saturated air) • Data logging (HI2641 only) · Manual log-on-demand · Manual log-on-stability · Interval logging • Automatic Temperature Compensation from 0 to 50 °C • GLP data · Records date, time, calibration standards, pressure value, and salinity value • Pressure compensation from -500 to 4000 meters (-1640 to 13,123’) • Salinity compensation from 0 to 40g/L Features at a Glance 6 Dissolved Oxygen 6.17 www.hannainst.com | benchtop
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