Dissolved Ammonia Monitor
Many refrigeration cooler systems use ammonia-based heat exchangers. These ammonia chillers are used in a variety of applications including breweries, dairies, and beverage manufacturers. Widely used in the 1960s, ammonia-water absorption refrigeration cooler systems fell in popularity due to low efficiencies and safety concerns: leaks in the heat exchanger can cause ammonia to escape into the water supply. However, the technology has now evolved to nearly double the efficiency of old systems, leading to their gain in popularity.
Concerns about the safety of using ammonia, especially where ammonia contamination of food products is a risk, can be allayed by using the ATi Q45N . Continuous monitoring of ammonia in water and waste water streams is becoming increasingly important for plant operations and process control yet conventional on-line monitors can be expensive, complex and labour-intensive. In the food and beverage industries, safety is allied with cost and efficiency as one of the paramount concerns.
If there is a leak of ammonia out of the cooling system into process water there are two problems; the previously mentioned risk of food contamination is one, a dramatic loss in efficiency of the cooler system is another. Cooling systems are expensive to run and by monitoring the ammonia content of the process water any potential drops in efficiency can be detected early to save money.
The Q45N Dissolved Ammonia Monitor from ATi uses reaction chemistry to convert ammonia in a solution to a stable monochloramine compound which is then measured with a unique amperometric sensor.
The Q45N monitoring package provides the measurement stability needed to avoid complicated automatic calibration systems and, thanks to this technology, the amperometric sensor provides excellent repeatability over long periods of time. As the measurement utilises chloramine conversion for measurement, the sample is inherently subjected to biocidal conditions, eliminating long term biofouling on the sensor.
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