HI97701 Free Chlorine Portable Photometer with CAL Check — HI97701 Free Chlorine Portable Photometer with CAL Check HI97739 High-Range Fluoride Portable Photometer HI97739 High-Range Fluoride Portable Photometer —

HI97761Chlorine Total ULR portable photometer

275.00  + PVM

SKU: HI97761 Categories: ,

Available on backorder

HI97761 is an advanced portable photometer for theultra low level measurement of total chlorine in water and has a range up to 0.500 mg/L (ppm). This meter has a superior optical system that utilizes 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
  • CAL Check for performance verification and calibration

Also available as a KIT :HI97761C 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.



photometer optical system
  • ED 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

    Stable Light Source:

    • The internal reference system of the HI97762 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.


    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 HI97761 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 HI97762 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.

    Total Chlorine ULR Range 0.000 to 0.500 mg/L (as Cl2)
    Total Chlorine ULR Resolution 0.001 mg/L
    Total Chlorine ULR Accuracy ±0.020 mg/L ±3% of reading
    Total Chlorine ULR Method Adaptation of the USEPA method 330.5
    Photometer/Colorimeter 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 (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 HI97761 is supplied with cuvettes (2), caps (2), plastic inserts for cuvettes (2), 1.5V AA batteries (3), instruction manual, and instrument quality certificate.


    Kit : HI97761C 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.


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