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    Product description

    This pocket photometer is specially designed for the determination of calcium in seawater. It is much more accurate than test kits and test strips and the results are digitally displayed. It is light as a feather and therefore useful for measuring the calcium content in the sea and saltwater aquariums. No more messing around with test strips and comparing colors, digital measurement is much more accurate. This photometer is very easy to read and moreover it measures according to the well-known Zincon method.

    • Economic, fast and precise measurements
    • Very clear digitally readable display
    • Very easy to use with just one control button
    • Practically no maintenance
    • Automatic switch-off after 10 minutes


    Measuring range

    200 to 600 mg / l (= ppm) Calcium (Ca)


    ± 6% of the reading value


    1 mg / l (ppm)

    Light source

    led at 610 nm


    adaptation of the Zincon method


    1 battery of 1.5 V type AAA


    0 to 50 ° C, maximum 95% RH, non-condensing

    Measurements and weight

    81.5 x 61 x 37.5 mm / 64 g

    The HI758 comes with 2 measuring cuvettes with a cap, a 1.5 V AAA battery, reagents for 25 tests, one 1 ml syringe, a small syringe and a manual.


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    HI758 Checker photometer for Calcium in Salt Water
    € 69,-
    HI758 Checker photometer for Calcium in Salt Water
    2 In stock: Ordered on working days before 17:00, shipped the same day.
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