The Hanna Fluoride High Range Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector to precisely determine ion concentration. Professional instrumentation offers greater resolution and accuracy but can cost hundreds of dollars. The Hanna Fluoride High Range Checker® uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.
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The HI739 Checker® HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure fluoride.
Fluoride is one of the very few chemicals that have been shown to cause significant effects in people through drinking water. Fluoride has beneficial effects on teeth at low concentrations in drinking water, but excessive exposure to fluoride in drinking water, or in combination with exposure to fluoride from other sources, can give rise to a number of adverse effects.
Water fluoridation is the controlled addition of fluoride to a public water supply to reduce tooth decay. Fluoridated water operates on tooth surfaces: in the mouth, it creates low levels of fluoride in saliva, which reduces the rate at which tooth enamel demineralizes and increases the rate at which it remineralizes in the early stages of cavities. A 1994 World Health Organization expert committee suggested a level of fluoride from 0.5 to 1.0 mg/L, depending on climate. Bottled water typically has unknown fluoride levels, and some domestic water filters remove some or all fluoride.
Designed as a more accurate alternative to chemical test kits, the HI739 provides quick, accurate results in four easy steps:
* To zero, mix 2 ml of Reagent A and 8 ml of Reagent B; gently invert 5 times, and wait 1 minute before inserting in the meter and pressing the button.
0.0 to 20.0 ppm
±0.5 ppm ± 5% of reading
adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, SPADNS method.
1.5V AAA / 10,000 hours of continuous use
0 to 50°C (32 to 122°F); RH max 95% non-condensing
after ten minutes of non-use
Photometer/Colorimeter Light Source
LED @ 610 nm
Photometer/Colorimeter Light Detector
154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
196 g (6.91 oz.)
HI739 Checker® is supplied with (2) sample cuvettes with caps, fluoride HR reagent starter kit for 15 tests (1 bottle of fluoride HR reagent A, 1 bottle of fluoride HR reagent B), (2) 1 mL syringe with tip, pipette, battery, and instructions.