Field Of Application; Measuring Principle Of The Uv/Vis Sensor - wtw CarboVis 700/5 IQ Set Operating Manual

Overview
Compressed-air
cleaning
1 - 2
1.2

Field of application

The CarboVis 700/5 IQ Set is an online measuring system for in-situ
determination of carbon sum parameters in waste water treatment
plants. The range of application comprises control, feedback control
and monitoring. The CarboVis 700/5 IQ Set can be used in the inlet or
outlet.
The CarboVis 700/5 IQ Set is equipped with a compressed-air
operated cleaning system for the sensor. It works effectively and
without side-effects. The cleaning system is maintenance free and
wear free.
1.3

Measuring principle of the UV/VIS sensor

The UV/VIS sensor operates according to the measuring principle of
UV/VIS spectrometry.
Any substance contained in a measuring solution weakens a light
beam that penetrates the measuring solution. The weakening
(absorbance) of the light beam is measured for different wavelengths.
The wavelength dependent distribution produces the absorbance
spectrum.
The wavelength range where an absorbance occurs characterizes the
substance. The amount of the substance determines the extent of the
absorbance.
The influence of typical interference matrix variants occurring at
municipal waste water treatment plants can be eliminated by including
the entire absorbance spectrum.
With this measuring principle, measuring does not take place
continuously but at intervals.
CarboVis 700/5 IQ Set