TETHYS

UV500 ATEX Online Water Analyser

OVERVIEW
Parameter Specification
Accessories
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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. Based on UV spectroscopy, well known for its stability and low operating cost, the UV500 ATEX can measure parameters like aromatics hydrocarbons (PAH), hydrogen sulphide, organic matter, ammonia. Each parameter corresponds to a specific optical module or software that can be selected by the user while ordering the analyser, depending on the application.A colorimetric module allows the measurement of phosphate or chromium VI.Probes can be added for physicochemical parameters like pH, ORP, dissolved oxygen and conductivity.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.

Ex pz protection according to EN94/9/EC

The UV500 ATEX has a IP 65 stainless steel enclosure with an air purge system Ex pz to work on hazardous areas classified "zone 1 or Zone 2" 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. The analyser is designed to work up to 60°C of ambient temperature to avoid the use of vortex cooler. Depending on the certification needed a marking plate can be fixed on the enclosure with the marking below as an example :

II 3G Ex [pz] IIC T3

II : non-mining	3G : category 3 for Gaz	PZ : pressurised	IIA : propane	T1 : 450°C
	3D : category 3 for Dust		IIB : ethylene	T2 : 300°C
			IIC : Acetylene, hydrogen	T3 : 200°C
				T4 : 135°C
				T5 : 100°C
				T6 : 85°C

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.

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

Note: Click on image to view it large.

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.

UV500 ATEX Dimensional Drawing

Online water analyzer, UV500 ATEX - Parameter Specification

Parameter	Standard range Other ranges on request	Typical Repeatability For low values (<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 COD +/- 1 mg/l COD +/- 10 mg/l COD	+/- 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 BOD +/- 0.5 mg/l BOD +/- 5 mg/l BOD	+/- 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 TOC +/- 0.5 mg/l TOC +/- 5 mg/l TOC	+/- 2%
Nitrate	0-100 mg/l NO3	+/- 0.1 mg/l NO3	+/- 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 C6H6	+/- 2%
Oil in Water	0-100 ppm OIW 0-1000 ppm OIW	+/- 0.1 ppm OIW +/- 1 ppm OIW	+/- 2%
Phosphate	0-2 mg/l P-PO4 0-20 mg/l P-PO4	+/- 0.01 mg/l P-PO4 +/- 0.1 mg/l P-PO4	+/- 2%
Hydrogen sulphide	0-20 mg/l H2S	+/- 1 mg/l H2S	+/- 5%
Chromium VI	0-2 mg/l Cr VI	+/- 0.04 mg/l Cr VI	+/- 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	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%

Online water analyzer, UV500 ATEX - General Specification

Sample flow	Recommended : 0 - 5 L/MIN 0 – 0.5 l/min for NH4 or H2S
Sample pressure	0 - 4 Bar (0 - 1 Bar with sampling peristaltic pump) 0 - 0.5 Bar for NH4 or H2S
Sample temperature	0 °C to 80 °C 0 - 30 °C for NH4 or H2S
Wet parts material	Quartz, Polypropylene, Polyethylene, FPM (viton), PMMA (+ pharmed and glass for NH4 or H2S) H2S)
Measuring time	5 sec (Except PO4, NH4, H2S, Cr(VI) : 3min)
Measurement interval	1 min to 720 min (Except PO4, NH4, H2S, Cr(VI) : 4min.)
Memory	5000 lines of measurements (up to 16 channels) with date and time
Consumption	Cleaning solution (5% sulfuric acid): 220 ml/day Reagent per measurement : 2 ml per measurement / NaOH 10% for NH4: 2 ml per measurement / HCl 10% for H2S: 2 ml per measurement
Maintenance interval	Recommended: 6 months to 1 year (except for refilling)
Power supply	100-240v AC 50/60 Hz 150 VA
Screen	Colour TFT LCD 640x480 pixels with LED backlight
Communication	RS232, Modbus RS485, Modbus USB
Certifications	CE, EN 61010-1, EN 61326
Enclosure	Stainless Steel IP65
Ambient Temperature	-20°C to 60°C
Dimensions	850 x 725 x 270 mm (HxLxD)
Weight	50 to 70 kg depending on the configuration

ONLINE WATER ANALYZER, UV500 ATEX - ACCESSORIES

Basic unit

UV500 ATEX

Basic unit (no measurement included)
Color graphic display 640x480 pixels with touch screen
Built-in data logger, memory 5000 measurements for each parameter
12 sockets for input and output modules (not included, refer to options)
7 available glands for inputs / outputs
RS232 included (Sub-D 9 ways female connector) with 2 meters cable for RS485 PC included for communication with MODBUS protocol
USB port included for USB key connection
Automatic cleaning system with 2-liter tank
Power supply 90-260 VAC 47-63 Hz with power cord 2 meters
Enclosure IP65 / Nema4x stainless steel 316 850x725x270 mm (HxWxD) / 50 to 70 kg Mounting lugs for wall
3G certification type II Ex [pz] IIC T4 (Consult us)

Sampling pump

P	Sampling peristaltic pump for unpressurized water Built-in on the left side of the enclosure, Flow of about 600 ml/min Discontinuous operating to increase tube lifetime

Spectrograph (required for UV254, COD, BOD, TOC, NO3, Colour, PO4, Cr VI, NH4 and H2S measurements)		Absorbance for cell and xenon lamp (required for UV254,COD, BOD, TOC, NO3, Color, PO4, Cr VI measurements)
SPECTRO500	UV-Visible spectrograph Range: 180 – 750 nm Resolution 0.29 nm 2048 pixels	ABS500	Flow cell and xenon lamp for absorbance measurements Optical path: 1 or 3 gold 10 mm Lamp lifetime: 1 E 9 flashes Wet materials: PMMA, Viton, Quart

Configuration and calibration for measurements by absorbance (require SPECTRO500 and ABS500 modules)

COD-H-500	Organic matter high range high range: 0 – 2,000 Abs/m (equivalent to approx. 20,000 mg/l COD on municipal waste water)	NO3-500 Nitrate	Nitrate Range: 0 – 100 mg/l NO3 (0 – 25 mg/l N of NO3) Measurement possible until 250 mg/l NO3 (60 mg/l N-NO3)
COD-M-500	Organic matter Medium range medium range: 0 – 600 Abs/m	CO-H-500	Colour high range Range: 0 – 1000 Pt-Co unit
COD-L-500	Organic matter low range Low range: 0 – 200 Abs/m (equivalent to 100 mg/l COD on river water)	CO-L-500	Colour low range Range: 0 – 100 Pt-Co unit

Measurement by UV fluorescence (required for PAH and OIW measurements)

PAH-500Poly-aromatic hydrocarbons
	Range: 0 – 10 ppm phenol Range: 0 – 100 ppm OIW (equivalent to approx. 0 – 100 ppm oil with 10% aromatic ratio)

Measurement module by colorimetric method (require SPECTRO500 and ABS500 module)

PO4-H-500	Phosphate high range High range: 0 – 20 mg/l P (60 mg/l PO4) Sampling peristaltic pump included	PO4-L-500	Phosphate Low range Low range: 0 – 2 mg/l P (6 mg/l PO4) Sampling peristaltic pump included
CR6-500	Hexavalent chromium (VI) Range: 0 – 2 mg/l Cr VI Measurement possible until 5 mg/l Cr VI

Measurement by nephelometry

IRTURB-H-500	Internal turbidity sensor high range High range: 0 – 1,000 NTU Nephelometric method by laser diode at 650 nm (850 nm on request)	IRTURB-L-500	Internal turbidity sensor low range Low range: 0 – 10 NTU Nephelometric method by laser diode at 650 nm (850 nm on request)
IRTURB-M-500	Internal turbidity sensor medium range Low range: 0 – 100 NTU Nephelometric method by laser diode at 650 nm (850 nm on request)

Measurements by optical method

	The spectrograph option SPECTRO must be included
STRIP500	Stripping system Include xenon lamp, flow cell, glassware, air pump, air filter and solenoid valve
NH4-500	Ammonia Range: 0 – 100 ppm NH4+
H2S-500	Hydrogen sulfide Range: 0 – 20 ppm H2S

Input Modules

IN4-20-500	4-20 mA input module Isolated 4-20 mA input Impedance: 100 Ohm
LOGIC500	Double logical inputs module Input no 1 : external pulse command for measurement Input no 2 : measurements inhibition Isolated 0 – 48 V DC inputs Impedance: >10 Kohm

Measurements by electrode (external)

PH500	pH/ORP module pH Range: 0 – 14 ATC input for platinum RTD 100 Ohm or 1000 Ohm ORP Range: -2000 mV to +2000 mV
ELPH	pH on-line electrode Range: 0 – 14 5 meters of cable (10 meters in option) Built-in ATC RTD 100 Ohm
ELORP	ORP on-line electrode Range: -2000 mV to +2000 mV 5 meters of cable (10 meters in option) Built-in ATC RTD 100 Ohm
COND500	Conductivity module Range: 0 – 100 µS to 0 – 100 mS ATC input for platinum RTD 100 Ohm
ELCOND	Conductivity on-line electrode Range: 0 – 10 mS Cell constant k=1.0 cm-1 (medium range) 5 meters of cable (10 meters in option) Built-in ATC RTD 100 Ohm
ICOND	Inductive conductivity online probe Range: 0 – 100 mS 3 meters of cable Built-in temperature compensation at 2.2%/°C Requires a IN4-20-500 module instead of COND500 module

Output Modules

OUT4-20-500	4-20 mA output module Isolated 4-20 mA output Active output, Max load 500 Ohm
RELAY500	Relay module Contact rating: 2A/220V

Recommanded consumables for 2 years :

P-ACI-HD1 : Head of cleaning pump (x1)
P-RGT-HD1 : Head of reagent pump (x1) (only for NH4 or H2S)
T-PHAR-1 : Tubing 6.4x9.6 mm (if optional sampling pump) (x2 to x8 depending on sampling pump use)
Cleaning solution and reagents (if any) are not provided

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. Mainly based on UV spectroscopy, well known for its stability and low operating cost, the UV500 ATEX can measure parameters like aromatics hydrocarbons (PAH), hydrogen sulphide, organic matter, ammonia, phosphate and turbidity. Each parameter corresponds to a specific optical module that can be selected by the user while ordering the analyser, depending on the application. 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 web-based interface allows the control and the troubleshooting at distance though an ATEX Wi-Fi or Ethernet connection using a standard browser on a computer or tablet.