+44 (0)1525 850 855
Order before 4pm for same day dispatch Weekdays only

In Stock 2 Items available


The HI-739 pocket checker is a simple and accurate way to measure high ranges of fluoride in fresh water.

Checker®HC is supplied with reagents for 15 tests. Use code HI-739-26 (30 tests) for future purchases.

0.0 to 20.0 ppm
Ideal for water quality testing

£83.20 (exc.VAT)
£99.84 (tax incl.)
Full Description Specification Manuals

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
  • Not suitable for aquariums of any kind

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

Four steps. One click. Instant Readout.

Step 1  1. ‘Zero’ the Checker®HC with your vial & 10ml water sample inside

Step 2  2. Take the vial out and add your reagent

Step 3  3. Place your vial into your Checker®HC

Step 4  4. Press the button and read the results

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

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

Read More

Range0.0 to 20.0 ppm
Resolution0.1 ppm
Accuracy @ 25°C±0.5 ppm ± 5% of reading
Light SourceLED @ 575 nm
Light Detectorsilicon photocell
Environment0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type(1) 1.5V AAA
Auto-offafter two minutes of non-use and ten seconds after reading
Dimensions81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”)
Weight64 g (2.25 oz.)
Methodadaptation of SPADNS method