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Water Care and Treatments:

Chlorine Testing......By Hanna Instruments.....
 

Chlorine will be found in all water as it is the most commonly used water disinfectant in the water industry today. Chlorine present in water binds with bacteria leaving only a part of the original chlorine (the free chlorine) to continue its disinfection action. Free Chlorine reacts with ammonium ions and organic compounds to form chlorine compounds known as combined chlorine. Combined chlorine and free chlorine taken together are known as Total Chlorine.
 

There are a number of ways of testing for Chlorine, but all rely on DPD standard chemistry, which is by measuring the colour developed in a water sample after adding a DPD reagent to the sample.

Chemical Test Kit.....(Colourimetric Test Kits)....

The most basic method of testing is to use a colour comparison chemical test kit, whereby the operator compares the colour developed within the sample to a colour chart or coloured cube. Click Here for further information and ordering.....



Colour Wheel Comparator.....(Checker Disk Test Kit)....

A step up from the chemical test kit in terms of accuracy is to use a colour wheel comparator, which provides a better resolution and resulting accuracy, but still depends on the operators visual interpretation of the Colour seen. Click Here for further information and ordering.....

Colorimeter or Photometer.....

The most accurate way of measuring the colour is to use an electronic version of the operators eye, and these are known as photometers or colorimeters. These shine a fixed wavelength light through the sample and then the meter measures the amount of light that has been absorbed - from this the meter can very accurately (to 0.01mg/l) measure the chlorine present and provide a digital readout of the result. Click Here for further information and ordering.....


An important note to remember when deciding on a Chlorine tester is that whilst the colour changing kits are the lower end of budget we don't all see colours in the same way.....But the final choice would be down to a How much you want to spend VS How accurate you want the result......
 

 

Chlorine Chemical Test Kit

Chlorine Colour Wheel Comparator Kit Colorimeter Photometer

Also See our Digital Meters for testing other water parameters:

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ERK Ltd
 

Please contact us if we can help in any matter <info@koicarp.net>
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