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Hardness, Total Range Hardness LR: 0 to 250 mg/L(as CaCO3); Hardness MR: 200 to 500 mg/L (as CaCO3); Hardness HR: 400 to 750 mg/L (as CaCO3)
Hardness, Total Resolution 1 mg/L
Hardness, Total Accuracy Hardness LR: ±5 mg/L ±4% of reading , Hardness MR: ±7 mg/L ±3% of reading, Hardness HR: ±10 mg/L ±2% of reading
Hardness, Total Method Adaptation of the EPA recommended method 130.1
Photometer/Colorimeter Light Source Light emitting diode
Photometer/Colorimeter Light Detector silicon photocell with narrow band interference filter @ 466 nm
Bandpass Filter Bandwidth 8 nm
Bandpass Filter Wavelength Accuracy ±1.0 nm
Cuvette Type round, 24.6 mm diameter (22 mm inside)
GLP date, time of last calibration
Display 128 x 64 pixel B/W LCD with backlight
Logging Type automatic logging
Logging Memory 50 measurement
Battery Type/Life 1.5V AA battery (3 pcs.) / > 800 measurements (without backlight)
Automatic Shut-Off After 15 minutes of inactivity (30 minutes before a READ measurement)
Environment 0 to 50°C (32 to 122°F); relative humidity: 100% (IP67)
Weight 380 g (13.4 oz.) with batteries
Dimensions 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0")
Ordering Information HI97735 is supplied with cuvettes (2), caps (2), plastic inserts for cuvettes (2), 1.5V AA batteries (3), instruction manual, and instrument quality certificate. Kit : HI97735C is supplied with CAL-Check standards, cuvettes (2), caps (2), plastic inserts for cuvette, (2), scissors, cuvette cleaning cloth, 1.5V AA batteries (3), instruction manual, and instrument quality certificate.
Notes The measurement of total hardness in water is important for drinking water, boilers and cooling towers, water purification, and agriculture.
