Specifications HI97741 Total Hardness and Iron, LR Mg Hardness Range 0.00 to 2.00 mg/L (as CaCO²) Resolution 0.01 mg/L Accuracy @25°C (77°F) ±0.11 mg/L ±5% of reading Method adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th ed. colorimetric method Ca Hardness Range 0.00 to 2.70 mg/L (as CaCO²) Resolution 0.01 mg/L Accuracy @25°C (77°F) ±0.11 mg/L ±5% of reading Method adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th ed. colorimetric method Total Hardness Range 0.00 to 4.70 mg/L (as CaCO²) Resolution 0.01 mg/L Accuracy @25°C (77°F) ±0.11 mg/L ±5% of reading Method adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th ed. colorimetric method Iron, LR Range 0 to 1.60 mg/L (as Fe) Resolution 0.01 mg/L Accuracy @25°C (77°F) ±0.01 mg/L ±8% of reading Method Adaptation of the TPTZ method. Measurement System Light Source light emitting diode Bandpass filter 525 nm Bandpass filter bandwidth 8 nm Bandpass filter wavelength accuracy ±1.0 nm Light Detector silicon photocell Cuvette type round 24.6 mm diameter (22 mm inside) Additional Specifications Auto logging 50 readings Display 128 x 64 pixel B/W LCD with backlight Auto-off after 15 minutes of inactivity (30 minutes before a READ measurement) Battery type / Life alkaline 1.5 V AA (3) / > 800 measurements (without backlight) Environment 0 to 50°C (32 to 122°F); 0 to 100% RH, non-serviceable Dimensions 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0") Weight 380 g (13.4 oz.) Ordering Information HI97741 is supplied with sample cuvettes (2), sample caps (2), plastic stoppers (2), 1.5V AA batteries (3), instrument quality certificate, and instruction manual. CAL Check standards and testing reagents sold separately HI97741C includes photometer, CAL Check standards, sample cuvettes (2), sample caps (2), plastic stoppers (2), 1.5V AA batteries (3), scissors, cuvette wiping cloth, CAL Check standard certificate, instrument quality certificate, instruction manual, and rigid carrying case. Reagents sold separately Reagents and Standards HI97741 HI97719-11 CAL Check standard cuvettes for hardness HI93719-01 hardness reagents for 100 tests HI93719-03 hardness reagents for 300 tests HI97746-11 CAL Check standard cuvettes for iron HI93746-01 iron reagents for 50 tests HI93746-03 iron reagents for 150 tests See page 10.128 for standard reagents; see page 10.129 for CAL Check kits; see page 10.66 for general accessories 10 Photometers 10.121 www.hannainst.com | portable
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