Water engineers responsible for municipal or industrial water and wastewater will find the new versatile single or dual parameter CA-6 UV Family of Spectroscopic Analyzers from Electro-Chemical Devices can monitor any two selected parameters in separate measurement ranges for ammonia, nitrate or chemical oxygen demand.
Each model is easy to order with either a single parameter or dual parameters in the factory pre-calibrated measurement ranges. Everything needed comes in one box ready to install and start-up. A single technician can complete the installation process in 15 minutes by connecting the sample, waste and cleaning solution (reagent) lines and powering up the analyzer. Accessing the chosen factory pre-calibrated parameter data or customizing an analysis routine is easily done with user-friendly intuitive menus and a touch screen display.
Each parameter is analyzed based on the measurement of UV absorption in the sample. The absorbance of the solution or gas is measured through a quartz flow cell at a specific wavelength using a long-life Xenon lamp and photo detectors.
To measure Ammonia, a reagent is added to the liquid sample and converts the ammonia to gas for measurement by the CA-6’s UV sensor with a fast Fourier transform algorithm that provides a measurement equivalent to the level of Ammonia. A water temperature probe performs automatic temperature compensation for high accuracy.
In measuring the Nitrate found in turbid, organic rich wastewater, the CA-6 UV’s advanced self-cleaning design relies on the strong absorption of UV light by the chromophore N-O. Automatic internal linearization compensates for high concentrations of Nitrate. A second wavelength and detector compensates for dirty matter in the flow cell to ensure high accuracy and reliability.
For the measurement of COD 254 nm, the CA-6’s sensor detects UV light absorption by unsaturated organic molecules at the 254 nm wavelength. COD 254 nm levels in river water and municipal wastewater are closely correlated to the permanganate and dichromate water standard methods. Measurement is extremely responsive, less than 10 seconds and requires no reagents or calibration solutions.
The versatile CA-6 Analyzer is designed with four alarm relays. A single 4-20 mA analog output is included with 12-bit resolution. RS232 communications are provided for data download to a CSV file, with an optional RS485 MODBUS communication module available.