Kemtrak photometers are ideally suited to the needs of water & environmental monitoring.

Water & Environmental applications include:

• Water Color - APHA, Hazen & Pt/Co
• Chlorine / Chlorine dioxide
• Ozone

A commonly used color scale to evaluate the pollution levels in both water and waste water is the Platinum-Cobalt scale (Pt/Co scale or Apha-Hazen scale).

This test method is specific to the colour yellow and is based on dillutions of a standard platinum cobalt solutions as defined by ASTM designation D1209 "Standard test method for color of clear liquids (Platinum-Cobalt Scale), International Standard ISO 6271-1:2004(E) "Clear liquids - Estimation of color by the platinum cobalt scale" and BS5339:76 (1993) "Measurement of Color on Hazen Units / Platinum-Cobalt".

Additional application areas for the Pt-Co/Apha-/Hazen colour scale include polymer additives, resin solutions, and solvents such as hexane, glycerol, methanol, mineral oils etc.

The Kemtrak DCP007 is a maintenance free industrial photometric analyzer that can accurately monitor water color from highly polluted waters (>1000 Pt/Co units) down to clear liquids at <1 Pt/Co units.

The Kemtrak DCP007 uses a combination of long life,
solid state LED lamps with fiber optics that provide
a measurement with very high precision. Thanks
to a proprietary dual wavelength four channel
measurement technique, high concentration to ppm
trace analysis is no problem.

The Kemtrak DCP007 uses a reference wavelength to compensate for turbidity and/or fouling of the optical windows providing accurate measurements with low drift and long term calibration stability.

Hazen color information sheet

Application notes

Chlorine dioxide information sheet

Chlorine (Cl2) and chlorine dioxide (ClO2) are important chemicals for water purification, in disinfectants, and in bleach. They are used as biocides in many industrial water treatment applications including cooling towers, process water and food processing.

Chlorine dioxide has a strong absorption between 350 and 450nm that the Kemtrak DCP007 can measure – from ultra low parts per million concentrations when used for gas detection or disinfection, to high concentration solutions used for the bleaching of pulp (>10 g/L).

The Kemtrak DCP007 can be used to optimize the reaction efficiency of ClO2 generation, improve the control of vent-gas scrubbers to reduce emissions into the atmosphere and for monitoring the final concentration of chlorine dioxide product sent to the bleaching plant.

Chlorine dioxide is an aggressive chemical substance – all wetted parts of the Kemtrak DCP007 flow cell are manufactured from corrosion resistant materials, such as PCTFE, PVC, titanium and sapphire.

Ozone is a powerful oxidizing agent used to kill microorganisms in air and water sources. Many municipal drinking water systems kill bacteria with ozone instead of the more common chlorine.

Ozone strongly absorbs at wavelenghts below 400nm (UV) that theKemtrak DCP007 can easily measure. The Kemtrak DCP007 uses a reference wavelength to compensate for turbidity and/or fouling of the optical windows providing accurate measurements with low drift and long term calibration stability.