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HANNA Fluoride High Range handheld colorimeter


The HI-739 pocket checker is a simple and accurate way to measure high ranges of 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 de-mineralises and increases the rate at which it re-mineralises in the early stages of cavities.

A 1994 World Health Organisation 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.


Key features:

  • Accurate and easy to use
  • Adaptation of SPADNS method
  • ±0.5 ppm ±5% of reading
  • 0.1 ppm resolution
  • Designed to work with Hanna reagents
  • Large easy to read digits
  • Auto shut-off


Ideal for:

  • Water testing
  • Quick on the spot analysis



Supplied with:

  • 2 sample cuvettes with caps
  • Reagents for 15 tests (re-ordering information HI-739-26 x 30 tests)
  • Syringe with tip
  • Pipette
  • 1 x 1.5V AAA battery
  • Instructions

Also available: HI-739-11 Calibration Set.

Battery powered – Allows use away from a power source. Batteries are included with all battery operated products.

Use HI-739-26 Reagents with Hi-739 Fluoride High Range Handheld Colorimeter, Checker®HC, 30 tests.

Use HI-739-11 Calibration Sets with Hi-739 Fluoride High Range Handheld Colorimeter, Checker®HC.


Specifications list


Range 0.0 to 20.0 ppm
Resolution 0.1 ppm
Accuracy @ 25°C ±0.5 ppm ± 5% of reading
Light Source LED @ 575 nm
Light Detector silicon photocell
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type (1) 1.5V AAA
Auto-off after two minutes of non-use and ten seconds after reading
Dimensions 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”)
Weight 64 g (2.25 oz.)
Method adaptation of SPADNS method