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Hardness, Total RangeHardness 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 Resolution1 mg/L
Hardness, Total AccuracyHardness 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 MethodAdaptation of the EPA recommended method 130.1
Photometer/Colorimeter Light SourceLight emitting diode
Photometer/Colorimeter Light Detectorsilicon photocell with narrow band interference filter @ 466 nm
Bandpass Filter Bandwidth8 nm
Bandpass Filter Wavelength Accuracy±1.0 nm
Cuvette Typeround, 24.6 mm diameter (22 mm inside)
GLPdate, time of last calibration
Display128 x 64 pixel B/W LCD with backlight
Logging Typeautomatic logging
Logging Memory50 measurement
Battery Type/Life1.5V AA battery (3 pcs.) / > 800 measurements (without backlight)
Automatic Shut-OffAfter 15 minutes of inactivity (30 minutes before a READ measurement)
Environment0 to 50°C (32 to 122°F); relative humidity: 100% (IP67)
Weight380 g (13.4 oz.) with batteries
Dimensions142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0")
Ordering InformationHI97735 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.
NotesThe measurement of total hardness in water is important for drinking water, boilers and cooling towers, water purification, and agriculture.
