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HI-97745 Free and Total Chlorine, Hardness, Iron Low Res, pH portable photometer

HI-97745 Free and Total Chlorine, Hardness, Iron Low Res, pH portable photometer

HI-97745 Free and Total Chlorine, Hardness, Iron Low Res, pH portable photometer

HI-97745 Free and Total Chlorine, Hardness, Iron Low Res, pH portable photometer

£412.80 (exc. VAT) £495.36 (inc. VAT)

HI-97745 is an advanced portable photometer for the measurement of free and total chlorine, total hardness, iron – low res, and pH in water. This meter offers a superior optical system that utilises a reference detector and narrow band interference filters for extremely fast and repeatable measurements.

  • No warm up time before taking a measurement
  • Tutorial mode for step-by-step instructions
  • Uses either powder or cost saving liquid reagents
  • HI-97745 Free and Total Chlorine, Hardness, Iron Low Res, pH portable photometer information

    Hanna's extended description

    The HI-97745 has an innovative optical system that offers superior performance in accuracy, repeatability, and the short amount of time it takes to perform a measurement. This compact, waterproof meter is extremely user friendly with a tutorial mode that walks the user graphically, step by step, in performing a measurement. The use of a backlit dot matrix LED allows the use of virtual keys which makes the operation of the meter very intuitive including selecting different methods, reviewing GLP data, recalling the last 50 measurements, and customising the meter to user preferences.

    HI-97745 is waterproof including the cuvette holder that is designed with ridges to protect the optical path from getting scratched by the cuvette and a protected battery compartment that holds three AA batteries. The compact design fits comfortable in the hand for use in the field or on a table for benchtop use. The LCD is 71 mm (2.75") by 37 mm (1.6") and is backlit for easy viewing under all conditions.

    Stable Light Source:

    The internal reference system of the HI-97745 photometer compensates for any drifts due to power fluctuations or ambient temperature changes. With a stable source of light the readings are fast and stable between your blank (zero) measurement and sample measurement.

    High Efficiency Light Source:

    LED light sources offer superior performance compared to tungsten lamps. LEDs have a much higher luminous efficiency, providing more light while using less power. They also produce little heat, which could otherwise affect electronic stability.

    High Quality Filters:

    Improved optical filters ensure greater wavelength accuracy and allow a brighter, stronger signal to be received. The end result is higher measurement stability and less wavelength error.

    Greater Light Yield:

    A focusing lens collects all of the light that exits the cuvette, eliminating errors from imperfections and scratches that may be present in the glass. The use of the convex lens reduces the need for indexing cuvettes.

    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.

    Multiple Measurement Methods:

    Users can select the use of powder reagents supplied in packets or the use of low cost liquid reagents supplied in a dropper bottle.

    Built-in Reaction Timer:

    Waiting the proper reaction time is of key importance when performing colorimetric measurements. The countdown timer displays the time remaining until a measurement will be taken, ensuring consistent results between sample measurements and users.

    Large Cuvette Size:

    The sample cell of the HI-97745 fits a round, glass cuvette with a 25 mm path length. The relatively long path length of the sample cuvette allows the light to pass through more of the sample solution, ensuring accurate measurements even in low absorbance samples.

    Intuitive Dot Matrix Display:

    The HI-97745 is designed with a backlit, graphic LCD. With virtual keys, a battery status indicator, and error messages. Users will find the meter interface intuitive and easy to read. A dedicated help key provides information relating to the current meter operation, and can be used at any stage in the setup or measurement process to show contextual help.

    Auto-off Protection:

    The meter uses three common AA batteries that allow for about 800 measurements to be taken. The auto-off feature automatically shuts off the meter after 15 minutes of inactivity in order conserve battery life.

    Advanced optical system

    LED that generates very little heat.

    8 nm narrowband interference filter that is accurate to +/- 1 nm and offers 25% increase in light efficiency.

    Reference detector that modulates the voltage to LED for consistent light output.

    A concave focusing lens that reduces errors from imperfections in the cuvette.


    Specifications list


    pH Range 6.5 to 8.5 pH
    pH Resolution 0.1 pH
    pH Accuracy ±0.1 pH @ 25°C
    pH Method adaptation of Phenol Red method
    Chlorine Range (all ranges) 0.00 to 5.00 mg/L (as Cl2)
    Chlorine Resolution 0.01 mg/L
    Chlorine Accuracy ±0.03 mg/L ±3% of reading
    Chlorine Method adaptation of the USEPA method and Standard Method 4500-CL G Method
    Total Hardness Range 0.00 to 4.70 mg/L ppm (as CaCO3)
    Resolution 0.01 mg/L
    Accuracy ±0.11 mg/L ±5% of reading @ 25°C
    Method adaptation of the standard method for the examination of Water andWastewater, 18th ed, calmagite colorimetric method
    Iron Low Range 0 to 1.60 mg/L ppm (as Fe)
    Resolution 0.01 mg/L
    Iron Accuracy ±0.11 mg/L ±8% of reading @ 25°C
    Iron Method adaptation of the TPTZ method
    Measurement system Light Source Light emitting diode
    Photometer/Colorimeter Light Detector silicon photocell with narrow band interference filter @ 525 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 (x3) / > 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, floating case)
    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 HI-97745 is supplied with cuvettes (2), caps (2), plastic inserts for cuvettes (2), 1.5V AA batteries (3), instruction manual, and instrument quality certificate. Also available as a kit: HI-97745C is supplied with CAL-Check standards, cuvettes (2), caps, (2), plastic inserts for cuvettes (2), scissors, cuvette cleaning cloth, 1.5V AA batteries (3), instruction manual, and instrument quality certificate.

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