UV500 ATEX

Online Water Analyser

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-mining3G : category 3 for GazPZ : pressurisedIIA : propaneT1 : 450°C
 3D : category 3 for Dust IIB : ethyleneT2 : 300°C
   IIC : Acetylene, hydrogenT3 : 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

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.


Online water analyzer, UV500 ATEX - Parameter specification

ParameterStandard range
Other ranges on request
Typical Repeatability
For low values (<10% FS)
Accuracy
On standard solution
UV2540-200 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 correlation0-100 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 correlation0-100 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 correlation0-100 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%
Nitrate0-100 mg/l NO3+/- 0.1 mg/l NO3+/- 2%
Colour0-100 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 Water0-100 ppm OIW
0-1000 ppm OIW
+/- 0.1 ppm OIW
+/- 1 ppm OIW
+/- 2%
Phosphate0-2 mg/l P-PO4
0-20 mg/l P-PO4
+/- 0.01 mg/l P-PO4
+/- 0.1 mg/l P-PO4
+/- 2%
Hydrogen sulphide0-20 mg/l H2S+/- 1 mg/l H2S+/- 5%
Chromium VI0-2 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%
pH0-14+/- 0.01 pH+/- 2%
ORP+/- 2000 mV+/- 1 mV+/- 2%
Dissolved oxygen0-25 mg/l O2+/- 0.1 mg/l O2+/- 2%
Conductivity0-2000 µS+/- 1 µS+/- 2%
Temperature0-80°C+/- 0.1 °C+/- 2%

 

Online water analyzer, UV500 ATEX - General specification

Sample flowRecommended : 0 - 5 L/MIN
0 – 0.5 l/min for NH4 or H2S
Sample pressure0 - 4 Bar (0 - 1 Bar with sampling peristaltic pump)
0 - 0.5 Bar for NH4 or H2S
Sample temperature0 °C to 80 °C
0 - 30 °C for NH4 or H2S
Wet parts materialQuartz, Polypropylene, Polyethylene, FPM (viton), PMMA (+ pharmed and glass for NH4 or H2S) H2S)
Measuring time5 sec (Except PO4, NH4, H2S, Cr(VI) : 3min)
Measurement interval1 min to 720 min (Except PO4, NH4, H2S, Cr(VI) : 4min.)
Memory5000 lines of measurements (up to 16 channels) with date and time
ConsumptionCleaning 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 intervalRecommended: 6 months to 1 year (except for refilling)
Power supply100-240v AC 50/60 Hz 150 VA
ScreenColour TFT LCD 640x480 pixels with LED backlight
CommunicationRS232, Modbus
RS485, Modbus
USB
CertificationsCE, EN 61010-1, EN 61326
EnclosureStainless Steel IP65
Ambient Temperature-20°C to 60°C
Dimensions850 x 725 x 270 mm (HxLxD)
Weight50 to 70 kg depending on the configuration

 

Online water analyzer, UV500 ATEX - Accessories

Basic unit

UV500 ATEXBasic 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

PSampling 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)
SPECTRO500UV-Visible spectrograph
Range: 180 – 750 nm
Resolution 0.29 nm
2048 pixels
ABS500Flow 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-500Organic 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-500Organic matter Medium range
medium range: 0 – 600 Abs/m
CO-H-500Colour high range
Range: 0 – 1000 Pt-Co unit
COD-L-500Organic matter low range
Low range: 0 – 200 Abs/m
(equivalent to 100 mg/l COD on river water)
CO-L-500Colour 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-500Phosphate high range
High range: 0 – 20 mg/l P (60 mg/l PO4)
Sampling peristaltic pump included
PO4-L-500Phosphate Low range
Low range: 0 – 2 mg/l P (6 mg/l PO4)
Sampling peristaltic pump included
CR6-500Hexavalent chromium (VI)
Range: 0 – 2 mg/l Cr VI
Measurement possible until 5 mg/l Cr VI

Measurement by nephelometry

IRTURB-H-500Internal turbidity sensor high range
High range: 0 – 1,000 NTU
Nephelometric method by laser diode at
650 nm (850 nm on request)
IRTURB-L-500Internal turbidity sensor low range
Low range: 0 – 10 NTU
Nephelometric method by laser diode at 650
nm (850 nm on request)
IRTURB-M-500Internal 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
STRIP500Stripping system
Include xenon lamp, flow cell, glassware, air pump, air filter and solenoid valve
NH4-500Ammonia
Range: 0 – 100 ppm NH4+
H2S-500Hydrogen sulfide
Range: 0 – 20 ppm H2S

Input modules

IN4-20-5004-20 mA input module
Isolated 4-20 mA input
Impedance: 100 Ohm
LOGIC500Double 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)

PH500pH/ORP module
pH Range: 0 – 14
ATC input for platinum RTD 100 Ohm or 1000 Ohm
ORP Range: -2000 mV to +2000 mV
ELPHpH on-line electrode
Range: 0 – 14
5 meters of cable (10 meters in option)
Built-in ATC RTD 100 Ohm
ELORPORP on-line electrode
Range: -2000 mV to +2000 mV
5 meters of cable (10 meters in option)
Built-in ATC RTD 100 Ohm
COND500Conductivity module
Range: 0 – 100 µS to 0 – 100 mS
ATC input for platinum RTD 100 Ohm
ELCONDConductivity 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
ICONDInductive 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

OUT4-20-5004-20 mA output module
Isolated 4-20 mA output
Active output, Max load 500 Ohm
RELAY500Relay 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

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