Multiparameter function for water quality monitor
15 Jan 2000
The latest additions to the Aztec 1000 series of water quality monitors from Capital Controls can measure iron, aluminium, manganese, phosphate, ammonia and silica. Completely standardised, they can if required be switched from one parameter to another by simple menu selection.
Based on colorimetric techniques, the range features further development of Capital's `motorised syringe' optical sensor, using a stepper-motor controlled piston pump to deliver samples to the sensor.
The sensor now uses LED as the light source instead of a tungsten filament lamp - a change said to improve stability and eliminate the need for a wavelength filter.
Another improvement comes in terms of reagent consumption, which is less than 1ml per sample measurement. A single set of reagents will last for at least 30 days with the monitor operating at six measurements per hour, although a facility to measure one, two, three or four times an hour has been retained.
Available in one, two and three stream versions, all the compact colorimetric monitors use the same cabinet, electronics and display system as the company's earlier range of nitrate, fluoride and ammonia ion selective electrode monitors.
A range of menu screens can be accessed via four membrane buttons on the cabinet's face.
To meet the changing demands of the water industry, the monitors will also soon be available with remote interrogation via a modem.
