You are using a version of Internet Explorer (version 8 and / or older) or the compatibility mode, which does not support some functionalities of the site you're viewing. This page can be displayed correctly you therefore may not. In order to use the full functionality of the site is a current Internet Explorer or another browser (eg: Google Chrome, Firefox) necessary.
HomeProductsProduct categoriesSensor technologyDigital IQ sensors (online) > IQ optical spectral probes (UV-VIS) for nitrate and carbon parameters

Digital optical UV-VIS spectral sensor for nitrate and carbon parameters like COD

WTW sensors - optical UV-VIS spectral sensors (nitrate, COD) NiCaVis® 705 IQ

NiCaVis® 705 IQ: Sensor with integrated ultrasonic cleaning for the reagent-free measurement of nitrate and carbon parameters in the wastewater treatment system drain

  • Reagent-free measurement of NO3, COD, BOD, TOC, DOC, SAC, UVT
  • No wear parts
  • Extremely robust thanks to titanium and PEEK

The optical measuring method of these sensors allows continuous measuring of carbon and nitrogen parameters directly in the medium. With this procedure, the information of the entire spectrum is evaluated, which allows the simultaneous determination of multiple parameters. At the same time, cross sensitivities of individual parameters among each other and interference such as turbidty are eliminated.


Model Description Order no.
Sensor with integrated ultrasonic cleaning. Multifunctional slide and shock-absorption-rings, without connecting cable (order SACIQ separately).
NiCaVis® 705 IQ Spectral UV-VIS probe for measuring nitrate, CODtot, CODdiss., TOC, BOD, DOC, SACtot., SACdiss. and UVT254 in the drain/outlet 481052

Technical Data

Model NiCaVis® 705 IQ
Measuring method Spectral measurement in the UV-VIS range of 200-720 nm
(optimized for municipal wastewater treatment plants)
Measuring range 0.00 ... 50.00 mg/l NO3-N
0.0…800.0 mg/l COD (tot/diss)
0.0…500.0 mg/l TOC
0.0…500.0 mg/l DOC
0.0…500.0 mg/l BOD
0.0…600.0 m-1 SAC 254 (tot/diss)
0.0…100.0 % UVT 254
Cleaning Maintenance-free WTW ultrasonic cleaning
Material Housing: Titanium, PEEK
Measuring window: Saphire glass
IQ SENSOR NET system 282/284 and 2020


Model Description Order no.
DIQ/CHV Dual IQ/Cleaning Head Valve for system 282/284 472007
MIQ/CHV PLUS Modules IQ/Cleaning Head Valve for system 2020 480018
Cleaning Air Box - 115 VAC Air pressure compressor, 115 VAC 480017
Cleaning Air Box - 230 VAC Air pressure compressor, 230 VAC 480019
VIS FT-1 Flow measuring cell for operation with automatic compressed air cleaning 480080
VIS FT-1/RS Spare parts set for VIS FT-1 480081
VIS Set Brushes/5mm 2 cleaning brushes for gap width 1 mm 481031
VIS/CT 2 cleaning brushes for gap width 5 mm 481032
VIS/CV Cleaning cards 481071
SET/AP Multifunctional slide 481074
VIS/CS Compressed air cleaning set: 15 m compressed air hose including fittings 481075


Are you interested
in signing up for the free
WTW newsletter?

WTW Newsletter Registration

Any Question?
We advise
you gladly!

WTW Contact

Related Videos