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 (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 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 municipal waste water treatment plants can be eliminated by including the entire absorbance spectrum.
To measure the organic load of water, the parameters TOC, DOC, COD and BOD are used. Reducing the organic load of wastewater is one primary importance to a WWTP. Many organic compounds have characteristic UV absorption spectrums. The intensity of the light attenuation can, therefore, be correlated with the organic load.
The new optical system design ensures the highest measurement accuracy, repeatability and stability. The drift-free sensor guarantees reliable data over extended periods of time, without the need for routine maintenance.
Using the full UV-VIS spectral wave length range from 200 to 720 nm provides the best measurement results and optimum compensation of interferences like turbidity. The CarboVis and NiCaVis sensors measure the total spectrum range from ultraviolet to long wave visible light – UV range and the VISible range. The CarboVis sensor can be placed at the influent and effluent of a plant allowing for accurate, real-time monitoring data. Data determination of measured values by spectral processing of the scanned UV-VIS spectrum.
The integrated, advanced ultrasonic cleaning system reduces manual window cleaning to an absolute minimum. High performance materials including Titanium and PEEK are used to withstand harsh conditions for extreme durability over the entire sensor lifespan.
Advantages for the user at-a-glance:
• Online measurement of COD, BOD, TOC, TSS and Nitrate.
• Patent pending optics for highest accuracy, stability and reliability.
• The best results and compensation is achieved by using the full UV-VIS range from 200 – 720 nm.
• Advanced ultrasonic cleaning system guarantees minimal maintenance.
• The Titanium and PEEK materials are used for extreme durability
SPECIFICATIONS
Measuring Principle: Spectral Measurement in the UV/VIS Range 200 – 720 nm
NO3-N:
0.1 to 100,0 mg/l inlet, aeration
0.01 to 25,00 mg/l outlet
Accuracy: ±3% of measured value ±0.5 mg/l (with Check algorithm, in standard solution)
Suspended Solids (Option) TS:
0 to 10.00 g/l inlet
Aeration 0 to 900.0 mg/l outlet
Materials Housing: Titan 3.7035, PEEK
Window: Sapphire glass
Pressure Resistance: 1 bar
Ambient Conditions Housing: Al Mg Si 1, anodised
Window: Sapphire glass
Flow velocity: ≤3 m/s
pH range: pH 4 to pH 12
Salt content of medium: < 5000 mg/l (Chloride)
Dimensions: 802 x 59.9 mm; length x max. diameter
Weight Approx.: 4 kg
Guarantee: 2 years for defects of quality
Ordering Information:
481 044 NitraVis® 701 IQ Optical nitrate probe with spectral processing of UVVIS range, for measurement in inlet/BNR part of municipal wastewater treatment plants, with integrated ultrasonic cleaning. Supplied with multifunctional slide and Shock Absorption-Rings, without connection cable (SACIQ order separately).
481 045 NitraVis® 701 IQ TS Double sensor Optical nitrate/TSS probe with spectral processing of UVVIS range, for measurement in inlet/BNR part of municipal wastewater treatment plants, with integrated ultrasonic cleaning. Supplied with multifunctional slide and Shock Absorption-Rings, without connection cable (SACIQ order separately).
481 046 NitraVis® 705 IQ Optical nitrate probe with spectral processing of UVVIS range, for measurement in the effluent of municipal wastewater treatment plants, with integrated ultrasonic cleaning. Supplied with multifunctional slide and Shock-Absorption-Rings, without connection cable (SACIQ order separately)
481 047 NitraVis® 705 IQ TS Double sensor Optical nitrate/TSS probe with spectral processing of UVVIS range, for measurement in the effluent of municipal wastewater treatment plants, with integrated ultrasonic cleaning. Supplied with multifunctional slide and Shock-Absorption-Rings, without connection cable (SACIQ order separately)
481 05 NiCaVis® 705 IQ Double sensor Optical nitrate and COD/TOC/DOC/BOD/SAC probe, with spectral processing of the UVVIS range, for measurement in the effluent of municipal wastewater treatment plants, with integrated ultrasonic cleaning. Supplied with multifunctional slide and Shock-Absorption-Rings, without connection cable (SACIQ order separately)