Analytical Instrumentation & Environmental Monitoring


Water turbidity monitor

July 2005 Analytical Instrumentation & Environmental Monitoring

Consumers and the general public are becoming increasingly conscious of the quality of drinking water, as well as environmental water in rivers and dams. This has resulted in stricter legislation for water quality and the Government's promise of quality drinking water for everyone.

One of the best ways to quantify the quality of water is to use a continuous turbidity monitoring system. The Hach Accu 4 is of the latest generation of turbidity monitoring equipment. By using a 4-beam method of measurement, it mathematically eliminates the errors caused by fouling and ageing of components, and compensates for any colour affected in the water being monitored.

The calibration of the Accu-4 remains stable for several years because the LEDs have a life expectancy of 10 years. The calibration can quickly and easily be verified with the patented 'Cal-Cube', which is a highly stable glass secondary standard, not affected by light, ageing or temperature.

The zero point calibration of the instrument is electronically checked once every minute, ensuring unsurpassed low range accuracy. Built-in diagnostic software automatically alarms the operator if there is a component malfunction, and if the unit needs cleaning. All this makes the Accu-4 a preferred turbidity monitor for all potable water applications - including soft drink production.

For more information contact Steve Herbst, PREI Instrumentation, 011 448 2172, prei@hixnet.co.za, www.eprei.co.za



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