HI-739 Fluoride High Range handheld colorimeter, Checker HC
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HI-739
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.
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.
1. ‘Zero’ the Checker®HC with your vial & 10ml water sample inside
2. Take the vial out and add your reagent
3. Place your vial into your Checker®HC
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.
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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 |