Automated potable water analysis
October 2001
Analytical Instrumentation & Environmental Monitoring
The Tytronics Sentinel was the first on-line analyser dedicated to the monitoring of wastewater. It is used extensively to detect the presence of fluoride, chlorine, ammonia, manganese, phosphate, nitrate, alkalinity, hardness, aluminium and iron. As an example, it is used at Alusaf Hillside to monitor the amount of fluoride in the wastewater from the aluminium processing plant to safeguard the environment.
Supplied by Protea Automation Solutions, Tytronics' sample technique provides one of the simplest and most reliable methods of capturing a reproducible volume of sample. The sample inlet uses large-bore tubing that alleviates downtime clearing blockages caused by suspended solids. The inlet system uses an internal fast loop ensuring that a fresh and representative sample is available for analysis. Sample capture volumes can range from 8 to 30 ml, which allows the instrument to be used for ppb as well as ppm levels of measurement.
The chemical parameters that can be measured cover an impressive wide field - colour, iron, manganese, phosphate, nitrate, fluoride, alkalinity, aluminium, hardness, ammonia, nitrate, copper, and free and/or total chlorine. The Sentinel can be expanded to analyse up to six separate sample streams per analyser. The colorimetric system uses dual wavelength optical configuration and an autoblank feature to compensate for background colour and turbidity. The Sentinel also has the facility to compensate for electronic drift on each analysis cycle and allows for automatic slope calibration.
The Sentinel is a fully automated, on-line system, reducing possible human error, and compensating for all temperature and pH variations. It is provided in an IP 65 enclosure and provided with RS232 interface facility for external data access.
Protea Automation Solutions
(011) 719 5700
pas@protea.co.za
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