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TETHYS

UV 400 / UV 400 ATEX

The UV400, based on a modular concept, allows to monitor simultaneously many different parameters for waste water or drinking water treatment plants as well as river monitoring stations. Each parameter corresponds to a specific optical module that can be

selected by the user while ordering the analyser, depending on the application.

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Mainly based on UV spectroscopy, well known for its stability and low operating cost, the UV400 can

measure parameters like organic matter, ammonia, nitrate, aromatics hydrocarbons (PAH), colour,

hydrogen sulphide and chlorophyll A. Complementary modules allows the measurement of phosphate

by colorimetric method and turbidity by a visible or infra-red laser diode

 

External probes can be added for physicochemical parameters like pH,ORP, dissolved oxygen,conductivity

and turbidity.

 

Thanks to its automatic cleaning system and its extremely long life time lamp, the maintenance is roughly limited to the periodic refill of the inexpensive cleaning solution and eventually reagents depending on the parameters.

 

A new web-based interface allows the control and the troubleshooting at distance using an internet browser on computer, tablet or i-phone.

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  • Most of the measurements (UV254, NH4, H2S, NO3, Colour, PO4, PAH, Chlorophyll A) are based on the UV-VIS spectroscopy that brings fast and stable measurements with a simple hydraulic circuit for a high reliability.

 

  • All the measurements are done within 5 seconds except PO4, NH4 and H2S that require about 3 minutes.

 

  • The patented flow cell allows very high level of suspended solid without clogging. The turbidity of the sample is automatically compensated by a dual-wavelength method.

 

  • The UV source is a xenon flash lamp specified for 109flashes that corresponds to more than 10 years of life time with one measurement every minute.

 

  • Physico-chemical measurements (pH, ORP, Dissolved oxygen, Conductivity) can be added to the internal measurements by using external probes. The dissolved oxygen probe is based on fluorescence method for a lowermaintenance and higher stability.

 

  • Three external turbidity probes (high, medium and low range) are also available  ifthe measurement need to be done in situ, for example before filtering.

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The UV400 ATEX has a IP 65 stainless steel enclosure with an air purge system Ex pz to work on hazardous areas classified  where a risk of explosive atmosphere is present like refineries or chemical plants. Two alarm contacts are provided if the pressure inside the enclosure drops below the adjustable setting points. This alarm can be used to switch off the power of the enclosure. A thermostatic vortex cooler can be installed as an option to maintain a moderate temperature inside the enclosure for outside use with high ambient temperature. After certification, a marking plate can fixed on the enclosure with the specified marking.

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When different streams need to be analysed, for example inlet and outlet of a plant, an optional

multiplexing system delivers relay contacts to control external electric-valves or external pumps

and UV400 models are equipped to achieve the same.

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Up to 6 different streams can be selected

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The measuring channels can be either duplicated (each one having its own 4-20mA output

or MODBUS register), or measured sequentially to fit with the maximum of 16 measuring channels

(a MODBUS register tells which stream is currently being measured).

 

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UV 500 / UV 500 ATEX

It allows to monitor simultaneously many different parameters for waste water treatment plants or rivermonitoring stations with an excellent stability and low operating cost.

​

The same spectrograph can measure organic matter, nitrate, colour, turbidity, phosphate, ammonia

andhydrogen sulphide. A complementary UV-visible fluorescence module allows the measurement

of aromatics hydrocarbons (PAH). Nephelometric turbidity by visible or infra-red laser diode is also available.

 

The full UV-visible spectrum can also be used to monitor specific chemical process making the UV500

aideal instrument for chemical plants. Different materials are available for the flow cell and hydraulic parts

depending on the matrix chemical compatibility.

​

External probes can be added for physicochemical parameters like pH, ORP, dissolved oxygen, conductivity

and turbidity.

​

Thanks to its automatic cleaning system and its extremely long life time lamp, the maintenance is roughly limited to the periodic refill of the inexpensive cleaning solution andeventually reagents depending on the parameters.

​

Advantages

 

  • A 2048 pixels high resolution spectrograph scanning wavelengths from 180 nm to 750 nm is the master part of the UV500. Direct absorbance measurement  for UV254, COD, BOD, TOC, NO3, Colour PO4 and Cr VI brings fast and stable measurements with a simple hydraulic circuit.  Factory predefined or local multi-point calibration allows to get readings of COD, BOD and TOC under the UV alternative method for compatible applications. UV spectroscopy brings faster results than conventional methods like COD, BOD, TOC with much less maintenance once the correlation is determined                                                                                            

  • An additional circuit allows the measurement of ammonia and hydrogen sulphide on the gas phase after a stripping step. This unique method allows measurements on extremely turbid or coloured samples like activated sludge as the gas phase is not affected. A fast Fourier transform (FFT) brings an exceptional selectivity and no interference has never been reported after years of operation on many different applications                                                       

  • The colour touch screen and intuitive interface available in 9different languages (Chinese, English, French, German,Hungarian, Italian, Portuguese, Spanish, Turkish) makes veryeasy to test or configure the analyser                                                                                                                                               

  • Many test functions allows to test and troubleshoot each element of the analysers (light signal, pumps, solenoidvalves, etc...) to setup quickly a maintenance diagnostic.                                                                                                                                                                                                                                                     

  • An acid resistant protection film on the screen assumes an efficient long term protection.

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When different streams need to be analysed, for example inlet and outlet of a plant, an optional multiplexing system delivers relay contacts to control external electric-valves or external pumps and UV400 models are equipped to achieve the same.

​

Up to 6 different streams can be selected

​

The measuring channels can be either duplicated (each one having its own 4-20mA output or MODBUS

register), or measured sequentially to fit with the maximum of 16 measuring channels

(a MODBUS register tells which stream is currently being measured).

 

The UV500 ATEX has a IP 65 stainless steel enclosure with an air purge system Ex pz to work on

hazardous areas classified  where a risk of explosive atmosphere is present like refineries

or chemical plants. Two alarm contacts are provided if the pressure inside the enclosure drops below

the adjustable setting points. This alarm can be used to switch off the power of the enclosure.

A thermostatic vortex cooler can be installed as an option to maintain a moderate temperature inside

the enclosure for outside use with high ambient temperature. After certification, a marking plate can

fixed on the enclosure with the specified marking.

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