USA drinking water gets better analysis

The Hach company of the USA has launched a series of new instrumentation in this third quarter of the year.

The company's ISE CSA610 on-line fluoride analyser offers constant fluoride monitoring for more precise management of drinking water. The instrument's low-reagent consumption, combined with its ability to calibrate automatically, enable it to run unattended for up to 30 days.

The CA610 measures fluoride concentrations ever 4.2 minutes, 24 hours/day and requires only 500ml of reagent over a 30-day period. Reagents and standards are fully enclosed in a case that is rugged, compact and corrosion-resistant - making it ideal for monitoring at remote locations.

USA turbidity innovations
Hach's new AquaTrend firmware has been created specifically to enable US water treatment plants comply with the EPA's latest requirement for turbidity monitoring, providing data logging every 15 minutes for a full 30 days - thus exactly meeting the EPA specification which requires water plants to monitor filters individually. Violations are based upon 2 consecutive readings at 15 minutes apart.

AquaTrend compresses and stores data automatically, thus eliminating the need for an on-site data logger or computer and for those customers who already use Hach firmware, upgrading to Version 4.0 is a simple procedure.

Ammonia accuracy
The company's new APA 6000 Low Range Ammonia Analyser has a high-sensitivity operating range - 0.02-2.00mg/L as N - and low reagent consumption for full-time monitoring in drinking water and power plants.

The APA 6000 uses a modified Phenate method to colourmetrically monitor free ammonia with laboratory accuracy - enabling water quality managers to control pH levels in boiler water and monitor ammonia levels in drinking water influent.

Using Hach's patented CSIA (Carrierless Sequential Injection Analysis), the APA 6000 Analyser can handle fresh samples every five minutes, using less than 1L per reagent, per month. Data is
displayed in a numerical or graphical format, with the capability for
showing units in terms of N or NH3.


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