Chlorine Dioxide (Rapid) Photometer Kit with CAL Check

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SKU HI97779C

The HI97779 is an advanced portable photometer for the measurement of chlorine dioxide in water. This meter offers a superior optical system that utilizes a reference detector and narrow band interference filters for extremely fast and repeatable measurements. Features CAL Check to verify meter performance, tutorial mode for step-by-step instructions and no warm up time before taking a measurement.

Kit includes CAL-Check standards, cuvettes, cuvette cleaning cloth, batteries and thermoformed carrying case.


- Stable Light Source
- Large Cuvette Size
- High Efficiency Light Source
- Intuitive Dot Matrix Display
- High Quality Filters
- Auto-off Protection
- Greater Light Yield

CAL Check Functionality

Hanna's exclusive CAL Check feature allows for performance verification and calibration of the meter using NIST traceable standards. Our CAL Check standard vials are developed to simulate a specific absorbance value at each wavelength to verify the accuracy of subsequent readings.


- Chlorine Dioxide Range: 0.00 to 2.00 mg/L (as ClO2)
- Chlorine Dioxide Resolution: 0.01 mg/L
- Chlorine Dioxide Accuracy: +/- 0.10 mg/L +/- 5% of reading at 25 C
- Chlorine Dioxide Method: adaptation of Standard Methods for the Examination of Water and Wastewater, 23rd Edition, 4500 ClO2 D
- Photometer/Colorimeter Light Source: LED with 525 nm bandpass filter
- Photometer/Colorimeter Light Detector: silicon photocell
- Bandpass Filter Bandwidth: 8 nm
- Bandpass Filter Wavelength Accuracy: +/- 1.0 nm
- Cuvette Type: round 24.6 mm diameter (22 mm inside)
- GLP: yes
- Display: 128 x 64 pixel B/W LCD with backlight
- Logging Memory: 50 readings
- Battery Type/Life: 1.5 V AA Alkaline (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); 0 to 100% RH (IP67)
- Weight: 380 g (13.4 oz.)
- Dimensions: 142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0")

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