CEM500 ONLINE GAS ANALYSER

ONLINE PROCESS ANALYZERS

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CEM500 ONLINE GAS ANALYSER

The CEM500 is an extractive online gas analyser dedicated to Continuous Emission Monitoring.

The CEM500 is an extractive online gas analyser dedicated to Continuous Emission Monitoring.
This new model is based on a 2048 pixels CCD (charge-coupled device) giving a higher resolution (0.1 nm) and a longer lamp life time (3 years) It is based on UV spectroscopy that brings a higher sensitivity than infra-red and gives the possibility to measure several gases simultaneously. A high selectivity is achieved by a fast Fourier transform (FFT) on the absorbance spectrum for all the gases having a periodic structure like NH3, SO2, NO and others. All the internal gas circuit is heated at 190°C to admit directly hot and humid combustion gases. The CEM500 is presented in a IP65 wall mounted enclosure. This model may include a heated sampling pump as an option.

 

MAIN METHOD : UV SPECTROSCOPY
  • Several gases can be measured simultaneously thanks to the UV spectroscopy method by using different wavelengths and algorithms. For gases with a periodic absorption spectrum such as NH3, SO2, NO, CS2 or acetylene, an algorithm based on FFT (Fast Fourier Transform) guarantees a very good selectivity of measurement. The solid-state design due to the UV spectroscopy gives a high reliability of the measuring system with quite no maintenance.
  •  
  • The UV lamp is a xenon flash lamp with a high lifetime and without thermal effect that may generate measurement drift.
  •  
  • The gas flow cell has two quartz windows to transmit the UV light through the measured gas. The standard path length of the flow cell is 240 mm.
  •  
  • The spectrograph is based on a concave grating to minimize the optical parts and the spectrum is read on a 2048 pixel CCD with a resolution of 0.1nm.
  •  
  • A zero is done automatically on zero air or nitrogen with an adjustable period (if possible every 2 or 4 hours but once per day remains acceptable).
  •  
  • The absorbance spectrum is calculated from the reference spectrum acquired during the zero step.
USER-FRIENDLY INTERFACE

A colour touch screen display interface allows the user to easily navigate through a number of screens that are used to set and check all of the operating conditions of the instrument. A protective film limits the risk to damage the surface of the touch screen, especially against solvent and corrosive liquid.

COMMUNICATION

Recorded data and diagnostic files for each parameter can be downloaded to memory stick thanks to a USB port. This allows to collect easily these files on site without using a computer. The files are in text format and can be directly imported to Excel® for graphic charts.

MULTI-GAS CONFIGURATION

Several gases can be measured in a same analyser if the sample gas composition is compatible with the selected algorithms and wavelengths. The analyser gives high measurement selectivity thanks to the recognition of the specific UV absorption spectrum of gases by using proprietary algorithms. For Denox applications, special algorythms allow to measure NH3 in a 0-10 ppm range with high level of SO2 up to 1200 ppm like on coal power plants.

AUTOMATIC COMPENSATION

An internal measurement of temperature and pressure of the sample is performed. A ratio related to the ideal gas law is applied on the measured value to compensate the effects of temperature and pressure. More…

ONLINE GAS ANALYZER, CEM500 – PARAMETER SPECIFICATION

 

PARAMETERRANGE* (PPM)RANGE* (MG/M3)TYPICAL REPEATABILITYDETECTION LIMIT
NH3
Ammonia
0-10 ppm
0-100 ppm
0-1000 ppm
0 – 7 mg/m3
0 – 70 mg/m3
0 – 700 mg/m3
0.05 ppm at 10 ppm
0.1 ppm at 100 ppm
0.5 ppm at 1000 ppm
0.1 ppm
NO
Nitrogen Oxide
0-2000 ppm0 – 2500 mg/m31 ppm at 1000 ppm3 ppm
SO2
Sulfur Dioxide
0-1000 ppm0 – 3000 mg/m32 ppm at 1000 ppm0.5 ppm
H2S
Hydrogen Sulfide
0-500 ppm0 – 750 mg/m30.5 ppm at 500 ppm0.5 ppm
NO2
Nitrogen Dioxide
0-2000 ppm0 – 4000 mg/m3 10 ppm
C6H6
Benzene
0-100 ppm0 – 300 mg/m3  
C7H8
Toluene
0-30 ppm0 – 100 mg/m3  
C8H10
Xylene
0-30 ppm0 – 150 mg/m3  
NCL3
Nitrogen Trichloride
0-100 ppm0 – 500 mg/m3  

 

ONLINE GAS ANALYZER, CEM500 – GENERAL SPECIFICATION

 

Data storage5000 measurements for all parameters
InterfacesInterface RS232 (MODBUS, AK)
USB port (for memory stick)
Internal WIFI interface IEEE 802.11 B (OPTION)
Internal Ethernet 10 BASE-T interface IEEE 802.3 (option)
Signals1 to 8 analog outputs 4-20 mA opto-isolated (option)
1 to 4 relay contacts programmable (option)
DisplayLCD colour screen (TFT) with LED backlight 640×480 pixels
Power supply110-240 VAC/ 1000 VA / 50-60 Hz
Operating limits0 to 40 °C, less than 90% as relative humidity
CE standardsElectromagnetic compatibility and safety
EN 61010-1, IEC 61010-1 / EN 61326, IEC 61326
EnclosureStainless steel IP65 with coating
Dimensions345 x 525 x 260 mm
Weight30 kg
Sampling gasPressure : 0 – 2 Bar Absolute (0 – 2000 hPa Absolute)
Flow : 0.1 to 10 l/min
Temperature : ambiant to 400 C
Fittings : Swagelok, stainless steel 316 for tube OD ¼” (6.4 mm)
Zero gasPressure : 0 – 2 Bar Absolute (0 – 2000 hPa Absolute)
Flow : 0.1 to 10 l/min
Fittings : Swagelok, stainless steel 316 for tube OD ¼” (6.4 mm)

ONLINE GAS ANALYZER, CEM500 – ACCESSORIES

 

SAMPLING PUMP PRODUCT CODE: PUMP500
Internal membrane pump with heated head
Built-in inside the enclosure
Flow about 6 l/min
Heated version at 190 °C
INPUT MODULES PRODUCT CODE: IN4-20
4-20 mA input module
Isolated 4-20 mA input
Impedance: 100 Ohm
INPUT MODULES PRODUCT CODE:LOGIC500
Double logical inputs module
Input no 1 : external pulse command for measurement
Input no 2 : measurements inhibition
Isolated 0 –24 V DC inputs
Impedance: >10 Kohm
OUTPUT MODULES PRODUCT CODE:OUT4-20-500
4-20 mA output module
Isolated 4-20 mA output
Active output, Max load 500 Ohm
OUTPUT MODULES PRODUCT CODE:RELAY500
4-20 mA output module
Contact rating: 2A/220V
COMMUNICATIONS PRODUCT CODE:WIFI500
Wifi Interface
Connection to wireless WIFI network
Standard IEEE 802.11b
Secured data transfer by WEP keys
COMMUNICATIONS PRODUCT CODE:ETHER500
Ethernet interface
Ethernet 10 base-T (IEEE 802.3)
DOWNLOAD CEM500 ONLINE GAS ANALYSER DETAIL

Brochures/ Data Sheet

Dimensional Drawing

CEM500-L ONLINE GAS ANALYSER

The CEM500-L is an extractive online gas analyser for Continuous emission monitoring (CEMS).

The CEM500-L is an extractive online gas analyser for Continuous emission monitoring (CEMS).
It is specifically dedicated to the new low level emission Regulations known as 50/30/5/3 (50 mg/Nm3 NOx, 30 mg/Nm3 SO2, 5 mg/Nm3 particles, 5 μg/Nm3 mercury) and also to chemical processes requiring low values of H2S. This new model is based on a multi-path flow cell of 1200 mm coupled to a high resolution spectrograph (0.1 nm) using an ultra-sensitive 2048 pixels CCD (charge-coupled device). It gives a high sensitivity and a longer lamp life time (3 years). The uv spectroscopy brings a higher sensitivity than Infra-red spectroscopy and also gives the possibility to measure several gases simultaneously on the same Spectrograph.

 

OPTICAL PRINCIPLE – MAIN METHOD : UV SPECTROSCOPY
  • Several gases can be measured simultaneously thanks to the UV spectroscopy method by using different wavelengths and algorithms. For gases with a periodic absorption spectrum such as NH3, SO2, NO, CS2 or acetylene, an algorithm based on FFT (Fast Fourier Transform) guarantees a very good selectivity of measurement. The solid-state design due to the UV spectroscopy gives a high reliability of the measuring system with quite no maintenance.
  •  
  • The UV lamp is a xenon flash lamp with a high lifetime and without thermal effect that may generate measurement drift.
  •  
  • The gas flow cell has two quartz windows to transmit the UV light through the measured gas. The standard path length of the flow cell is 1200 mm.
  •  
  • The spectrograph is based on a concave grating to minimize the optical parts and the spectrum is read on a 2048 pixel CCD with a resolution of 0.1nm.
  •  
  • A zero is done automatically on zero air or nitrogen with an adjustable period (if possible every 2 or 4 hours but once per day remains acceptable).
  •  
  • The absorbance spectrum is calculated from the reference spectrum acquired during the zero step.
NO INTERFERENCE WITH CO, CO2 AND CH4

The major emission gases like CO, CO2, and CH4 have no UV absorption, therefore they don’t interfere with the measured gases. H2O has a weak absorption in the UV range but at different wavelengths than combustion gases like NH3, NO, NO2 or SO2. Consequently, H2O, with an usual concentration between 5% and 20%, is not disturbing the measurements.

LOW MAINTENANCE AND HIGH RELIABILITY

The design has been specially oriented for low maintenance and high reliability on the measurements. The UV xenon lamp is specified for a lifetime of 109 flashes. Therefore, the lifetime is about 3 year with continuous measurements or 10 years with one measurement per minute. This reduces considerably the maintenance and the risk of wrong measurement due to aged lamps or its replacement.

MULTI-GAS CONFIGURATION

Several gases can be measured in a same analyser if the sample gas composition is compatible with the selected algorithms and wavelengths. The analyser gives high measurement selectivity thanks to the recognition of the specific UV absorption spectrum of gases by using proprietary algorithms. More…

ONLINE GAS ANALYZER, CEM500-L – PARAMETER SPECIFICATION

 

PARAMETERRANGE* (PPM)RANGE* (MG/M3)DETECTION LIMITREPEATABILITY
NH3
Ammonia
0-10 ppm0 – 7 mg/Nm30.1 ppm0.01 PPM AT 10 PPM
NO
Nitrogen Oxide
0-80 ppm0 – 100 mg/Nm30.5 ppm0.2 ppm at 40 ppm
SO2
Sulfur Dioxide
0-30 ppm0 – 100 mg/Nm30.05 ppm0.2 ppm at 30 ppm
H2S
Hydrogen Sulfide
0-200 ppm0 – 400 mg/Nm3  
NO2
Nitrogen Dioxide
0-200 ppm0 – 400 mg/Nm3  
CS2
Carbon Disulfide
0-20 ppm0 – 60 mg/Nm3  
C6H6
Benzene
0-20 ppm0 – 60 mg/Nm3  
C7H8
Toluene
0-5 ppm0 – 20 mg/Nm3  
C8H10
Xylene
0-5 ppm0 – 20 mg/Nm3  
NCL3
Nitrogen Trichloride
0-20 ppm0 – 100 mg/Nm3  

 

ONLINE GAS ANALYZER, CEM500-L – GENERAL SPECIFICATION

 

Data storage5000 measurements for all parameters
InterfacesInternal WIFI and Internal Ethernet
Signals1 to 8 analog outputs 4-20 mA opto-isolated (option)
1 to 4 relay contacts programmable (option)
DisplayLCD colour screen (TFT) with LED backlight 640×480 pixels
Power supply110-240 VAC/ 1000 VA / 50-60 Hz
Operating limits0 to 40 °C, less than 90% as relative humidity
CE standardsElectromagnetic compatibility and safety
EN 61010-1, IEC 61010-1 / EN 61326, IEC 61326
EnclosureStainless steel IP65 with coating
Dimensions345 x 525 x 260 mm
Weight25 kg
Sampling gasPressure : 0 – 2 Bar Absolute (0 – 2000 hPa Absolute)
Flow : 0.1 to 10 l/min
Temperature : ambiant to 400 C
Fittings : Swagelok, stainless steel 316 for tube OD ¼” (6.4 mm)
Zero gasPressure : 0 – 2 Bar Absolute (0 – 2000 hPa Absolute)
Flow : 0.1 to 10 l/min
Fittings : Swagelok, stainless steel 316 for tube OD ¼” (6.4 mm)

ONLINE GAS ANALYZER, CEM500-L – ACCESSORIES

 

SAMPLING PUMP PRODUCT CODE: PUMP500
Internal membrane pump with heated head
Built-in inside the enclosure
Flow about 6 l/min
Heated version at 190 °C
INPUT MODULES PRODUCT CODE: IN4-20-500
4-20 mA input module
Isolated 4-20 mA input
Impedance: 100 Ohm
INPUT MODULES PRODUCT CODE:LOGIC500
Double logical inputs module
Input no 1 : external pulse command for measurement
Input no 2 : measurements inhibition
Isolated 0 –24 V DC inputs
Impedance: >10 Kohm
OUTPUT MODULES PRODUCT CODE:OUT4-20-500
4-20 mA output module
Isolated 4-20 mA output
Active output, Max load 500 Ohm
OUTPUT MODULES PRODUCT CODE:RELAY500
4-20 mA output module
Contact rating: 2A/220V
COMMUNICATIONS PRODUCT CODE:WIFI500
Wifi Interface
Connection to wireless WIFI network
Standard IEEE 802.11b
Secured data transfer by WEP keys
COMMUNICATIONS PRODUCT CODE:ETHER500
Ethernet interface
Ethernet 10 base-T (IEEE 802.3)
COMMUNICATIONS PRODUCT CODE:MTI133
Phone modem
Industrial modem 33,6 Kb/s V34+
DIN rail Mounting
Power supply 24V from the analyser
DOWNLOAD CEM500-L ONLINE GAS ANALYSER DETAIL

Brochures/ Data Sheet

Dimensional Drawing

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