70
SPN FEB 2012 WaterTesting
THE COMPARATOR V PHOTOMETER OPTION
The choice on which system to use often comes down to one of two alternatives: a visual comparator or an electronic photometer based system. Each method has its own respective advantages and disadvantages.
Comparators use discs with continuous colour scales to take a measurement. When you add a chemical to the water (powder or tablet), a colour change is induced, enabling a visual match to be made and a reading taken. It’s an economic, consistent and reliable system. They are colour-stable, made of non-fade glass and will give good results for years. There is little to fail and kits are always ready to use. Moreover, there are over 400 different test discs commercially available to read an extensive list from alkalinity to zinc.
However there are disadvantages. The readings are subjective and can be affected by external influences. Comparators should be used in natural daylight so additional lighting may be needed. They rely on human colour analysis and not everyone is competent or accurate (8% of males suffer from some form of colour vision deficiency). Finally, although readings can be recorded, they must be noted by hand. There is no ability to print or store results electronically.
Photometers are electronic
instruments to measure parameters via the colourmetric principle. The units give a very accurate digital reading – clearly displayed on the screen. This removes potential subjectivity being imposed on the reading. They are easy to use and operated in any lighting conditions. Most photometers can also be battery operated. Many also enable results to be transferred to either a printer or a PC where they can naturally be stored for review or historic reporting.
Being electronic does mean the instruments need to be well maintained, kept clean and regularly calibrated. Check standards are now available to help verify the instrument’s calibration. Unfortunately, poorly maintained photometers will still give results – however meaningless they are.
www.swimmingpoolnews.co.uk
eXact Micro 10 photometer – reads combined chlorine with 0.01 precision and offers faster, safer precise water testing
for water quality parameters.
The eXact Micro 10 photometer offers faster, safer, easier, and more precise water testing. The eXact Micro 10 offers 10 modes which provide direct read capabilities for combined chlorine, free chlorine, total chlorine, cyanuric acid, total alkalinity, ozone, calcium hardness, phosphate, pH, chloride/salt, and percentage transmission which allows for testing of additional parameters.
The eXact Micro 10 is the first meter to read combined chlorine directly with 0.01 precision. In transmission mode, the unit reads 30 additional parameters with the use of a conversion table.
The photometer, available exclusively in the UK from Certikin International, was voted by readers of US publication Pool & Spa News as one of the ‘Top 50 Products of 2011’.
The annual readers’ choice award recognised the eXact Micro 10 for its “accurate and reliable on-site water testing results”.
Aimed at pool and spa professionals, the eXact Micro 10 directly reads free, total and combined chlorine, pH, total alkalinity, calcium hardness, cyanuric acid, salt, phosphate and ozone. In transmission mode, the unit reads 30 additional parameters with the use of a conversion table.
SWORD SCIENTIFIC GO ON STRENGTHENING INSTA TEST RANGE Speed and ease of use is a key issue for pool and spa owners, says Sword Scientific. Sword Scientific has given its pool and spa customers access to the LaMotte Pool and Spa test instruments from the United States which includes the Insta-Test strips, the multi-test ColorQ kits and the Pool MGR comparator system.
Sword has been strengthening the Insta-Test name and its brand awareness in the UK. A new iPhone application has also been launched. The application eliminates the need to determine slight colour variations visually and also has a manual entry option that allows any smart phone or online PC user to enter the test results from their test kit or test strip.
In seconds the programme can analyses the free chlorine, bromine, total chlorine, pH, alkalinity, total hardness, cyanuric acid, salt, biguanide or biguanide shock concentrations in the water and returns chemical treatment recommendations. spn
i FOR FURTHER INFORMATION
F CERTIKIN INTERNATIONAL ( 01993 778855 :
www.certikin.co.uk F GOLDEN COAST ( 01271 378100 :
www.goldenc.co F HANNA INSTRUMENTS ( 01525 850855 :
www.hannainst.co.uk F ITS EUROPE ( 01722 717911 :
www.sensafe.com F PALINTEST ( 0191 491 0808 :
www.palintest.com F SWORD SCIENTIFIC LTD (LAMOTTE) ( 01926 498203 :
www.sword-scientific.com F LOVIBOND TINTOMETER ( 01980 664800 :
www.lovibondwater.com
Contact
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100