UV500 ATEX

The UV500 ATEX, based on a modular concept, allows to monitor one or several parameters for process water, cooling water or waste water. The special enclosure and air purge system allows to use it on hazardous areas classified “Ex” like refineries and chemical plants.

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Measures: Multi-Parameter

Industries: Brewing, Chemical, Data Centre, Discharge Licence Compliance, Environmental Monitoring, Food, Wastewater, Water

Measure. Monitor. Repeat.

For better insights, better decision-making and better process performance.

Key Benefits

Supports integration of external probes for pH, ORP, dissolved oxygen, and conductivity.
Automatic cleaning system reduces manual maintenance.
Long-life lamp ensures minimal downtime and extended operational lifetime.
Parameters can be selected individually through specific optical modules or software during ordering.

UV500 ATEX

Key Benefits

Modular UV500 ATEX allows monitoring of one or multiple water parameters.
Suitable for process water, cooling water, and waste water.
Designed for hazardous areas classified “Ex” (refineries, chemical plants).
Uses UV spectroscopy for stable, low-cost measurements.
Measures aromatics hydrocarbons (PAH), hydrogen sulphide, organic matter, and ammonia.
Optional colorimetric modules enable measurement of phosphate and chromium VI.

Product Description
Technical Data

Main method : UV-visible spectroscopy

All the measurements (PAH, H2S, UV254, NH4, PO4, Colour) are based on 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 H2S, NH4 and PO4 that require about 3 minutes.
The UV source is a xenon flash lamp specified for 10^9 flashes that corresponds to more than 10 years of life time with one measurement every minute.
Three external turbidity probes (high, medium and low range) are also available if the measurement need to be done in situ, for example before filtering.

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Patented clogging-free flow cell

1: spectrograph,
2 : beam splitter,
3 : patented water flow cell,
4&5 : xenon lamps,
6 : gas flow cell ,
7 : gas pump,
8 : stripping pot,
9 : temperature probe

UV double wavelength absorbance principle

1: spectrograph,
2 : beam splitter,
3 : patented water flow cell,
4&5 : xenon lamps,
6 : gas flow cell ,
7 : gas pump,
8 : stripping pot,
9 : temperature probe

UV fluorescence principle

1: spectrograph,
2 : beam splitter,
3 : patented water flow cell,
4&5 : xenon lamps,
6 : gas flow cell,
7 : gas pump,
8 : stripping pot,
9 : temperature probe

Turbidity by laser diode principle

1: spectrograph,
2 : beam splitter,
3 : patented water flow cell,
4&5 : xenon lamps,
6 : gas flow cell,
7 : gas pump,
8 : stripping pot,
9 : temperature probe

Hydrogen sulphide and ammonia : a unique method

The hydrogen sulphide and ammonia measurement are based on the UV absorption of the hydrogen sulphide gas or ammonia gas after a stripping phase. Consequently, the turbidity or colour of the sample has absolutely no influence and measurements can even be carried on activated sludge.

The ammonia gas has a typical periodic absorption spectrum that is analysed using a fast Fourier transform (FFT) that brings an exceptional selectivity. No interference has never been reported after years of operation on many different applications. A small quantity of hydrochloric acid is added to the sample for hydrogen sulphide, or NaOH solution for ammonia.

1: stripping pot,
2 : temperature probe,
3 : gas flow cell,
4 : gas pump,
5 : xenon flash lamp,
6 : spectrograph

User-friendly interface

The colour touch screen and intuitive interface available in 8 different languages (Chinese, English, French, German, Italian, Portuguese, Spanish, Turkish) makes very easy to test or configure the analyser. Many test functions allows to test and troubleshoot each element of the analysers (light signal, pumps, solenoid valves, etc...) to setup quickly a maintenance diagnostic.

Communication

Additional parameters are available like status code, error code, calibration values and pumps run time. Basic 4-20 mA output modules can be plugged on the main board for each measuring channel, in the limit of 12 modules. A USB port enables to download on any USB key the last 5000 recorded measurements as well as a diagnostic file containing the configuration and useful information for remote troubleshooting. The new web interface makes possible to drive remotely the analyser from any computer, tablet or i-phone with a web browser. For this, an optional Wi-Fi or Ethernet module is added inside the analyser to connect it to an existing network with an internet gateway. The recorded measurements file can be imported to Excel for graphs or other treatments. The software of the analyser can be upgraded by connecting a USB key.

Low maintenance and high reliability

The design has been specially oriented for low maintenance and high reliability on the measurements. To avoid deposits on the optical windows and tubing, the UV500 ATEX has a built-in automatic cleaning system that injects a 5% sulphuric solution normally once day. An auto-zero is performed at the same time to avoid any drift of the measurement. The patented flow cell limit the risk of clogging inside the flow cell. The level of the cleaning solution as well as reagents for H2S, NH4 or PO4 can be controlled at distance to plan the refill.

Parameter	Standard Range	Other Ranges on Request	Typical Repeatability (Low <10% FS)	Accuracy on Standard Solution
UV254	0-200 Abs/m	0-600 Abs/m, 0-2000 Abs/m	+/- 0.05 Abs/m, +/- 0.15 Abs/m, +/- 0.5 Abs/m	+/- 2%
COD by UV correlation	0-100 mg/l COD	0-2000 mg/l COD, 0-20,000 mg/l COD	+/- 0.05 mg/l, +/- 1 mg/l, +/- 10 mg/l	+/- 2%
BOD by UV correlation	0-100 mg/l BOD	0-1000 mg/l BOD, 0-10,000 mg/l BOD	+/- 0.05 mg/l, +/- 0.5 mg/l, +/- 5 mg/l	+/- 2%
TOC by UV correlation	0-100 mg/l TOC	0-1000 mg/l TOC, 0-10,000 mg/l TOC	+/- 0.05 mg/l, +/- 0.5 mg/l, +/- 5 mg/l	+/- 2%
Nitrate (NO3)	0-100 mg/l NO3	–	+/- 0.1 mg/l	+/- 2%
Colour	0-100 Pt/Co	0-1000 Pt/Co	+/- 0.1 Pt/Co, +/- 2 Pt/Co	+/- 2%
PAH (aromatics)	0-10 mg/l C6H6	–	+/- 0.01 mg/l	+/- 2%
Oil in Water	0-100 ppm OIW	0-1000 ppm OIW	+/- 0.1 ppm, +/- 1 ppm	+/- 2%
Phosphate	0-2 mg/l P-PO4	0-20 mg/l P-PO4	+/- 0.01 mg/l, +/- 0.1 mg/l	+/- 2%
Hydrogen sulphide	0-20 mg/l H2S	–	+/- 1 mg/l	+/- 5%
Chromium VI	0-2 mg/l Cr VI	–	+/- 0.04 mg/l	+/- 2%
Turbidity (TSS by correlation)	0-10 NTU	0-100 NTU, 0-1000 NTU	+/- 0.01 NTU, +/- 0.1 NTU, +/- 1 NTU	+/- 2%
pH	0-14	–	+/- 0.01 pH	+/- 2%
ORP	+/- 2000 mV	–	+/- 1 mV	+/- 2%
Dissolved Oxygen (DO)	0-25 mg/l O2	–	+/- 0.1 mg/l O2	+/- 2%
Conductivity	0-2000 μS	–	+/- 1 μS	+/- 2%
Temperature	0-80°C	–	+/- 0.1 °C	+/- 2%