YSI IQ S ENSOR N ET NitraVis 70x IQ TS - Manual (Page 6)

Overview
NitraVis 70x IQ TS
1 - 2 ba75950e02 11/2012
1.2 Fields of application
The range of application comprises control, feedback control and mon-
itoring.
Measuring location
Ultrasound cleaning
system
The ultrasound cleaning system ensures low maintenance and long-
term reliable measurement operation.
The ultrasound source integrated in the sensor excites the measure-
ment windows to produce vibrations in the ultrasound range. The
movement of the surface as a result of this prevents the growth of
pollution in almost all cases and, thus, ensures reliable measured
values during continuous operation.
Compressed air cleaning
(option)
The sensor is designed to be equipped with an additional compressed
air-driven cleaning system, which supports the ultrasound cleaning
system as necessary.
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 attenuates a light
beam that penetrates the measuring solution. The attenuation (absor-
bance) of the light beam is measured for different wavelengths. The
wavelength dependent distribution produces the absorbance spec-
trum.
The wavelength range where an absorbance occurs is characteristic of
the substance. The extent of the absorbance depends on the amount
of the substance.
The influence of typical interference matrix variants occurring at munic-
ipal waste water treatment plants can be eliminated by including the
entire absorbance spectrum.
With this measuring principle, measuring does not take place continu-
ously but at intervals.
NitraVis 701 IQ TS Aeration tank or inlet
NitraVis 705 IQ TS Outlet