- 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.
CEM500 ONLINE GAS ANALYSER
ONLINE PROCESS ANALYZERS
CEM 500 / 500-L
CEM 400
EXM 500 / 500-L
EXM 400
- PROBES
CEM500 ONLINE GAS ANALYSER
The CEM500 is an extractive online gas analyser dedicated to Continuous Emission Monitoring.
Description
Features
Parameter Specifications
Accessories
Downloads
Description
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
Features
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…
Parameter Specifications
ONLINE GAS ANALYZER, CEM500 – PARAMETER SPECIFICATION
| PARAMETER | RANGE* (PPM) | RANGE* (MG/M3) | TYPICAL REPEATABILITY | DETECTION 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 ppm | 0 – 2500 mg/m3 | 1 ppm at 1000 ppm | 3 ppm |
| SO2 Sulfur Dioxide | 0-1000 ppm | 0 – 3000 mg/m3 | 2 ppm at 1000 ppm | 0.5 ppm |
| H2S Hydrogen Sulfide | 0-500 ppm | 0 – 750 mg/m3 | 0.5 ppm at 500 ppm | 0.5 ppm |
| NO2 Nitrogen Dioxide | 0-2000 ppm | 0 – 4000 mg/m3 | 10 ppm | |
| C6H6 Benzene | 0-100 ppm | 0 – 300 mg/m3 | ||
| C7H8 Toluene | 0-30 ppm | 0 – 100 mg/m3 | ||
| C8H10 Xylene | 0-30 ppm | 0 – 150 mg/m3 | ||
| NCL3 Nitrogen Trichloride | 0-100 ppm | 0 – 500 mg/m3 |
ONLINE GAS ANALYZER, CEM500 – GENERAL SPECIFICATION
| Data storage | 5000 measurements for all parameters |
| Interfaces | Interface 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) |
| Signals | 1 to 8 analog outputs 4-20 mA opto-isolated (option) 1 to 4 relay contacts programmable (option) |
| Display | LCD colour screen (TFT) with LED backlight 640×480 pixels |
| Power supply | 110-240 VAC/ 1000 VA / 50-60 Hz |
| Operating limits | 0 to 40 °C, less than 90% as relative humidity |
| CE standards | Electromagnetic compatibility and safety EN 61010-1, IEC 61010-1 / EN 61326, IEC 61326 |
| Enclosure | Stainless steel IP65 with coating |
| Dimensions | 345 x 525 x 260 mm |
| Weight | 30 kg |
| Sampling gas | Pressure : 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 gas | Pressure : 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) |
Accessories
ONLINE GAS ANALYZER, CEM500 – ACCESSORIES
SAMPLING PUMP PRODUCT CODE: PUMP500
Internal membrane pump with heated headBuilt-in inside the enclosure
Flow about 6 l/min
Heated version at 190 °C
Flow about 6 l/min
Heated version at 190 °C
INPUT MODULES PRODUCT CODE: IN4-20
4-20 mA input moduleIsolated 4-20 mA input
Impedance: 100 Ohm
Impedance: 100 Ohm
INPUT MODULES PRODUCT CODE:LOGIC500
Double logical inputs moduleInput no 1 : external pulse command for measurement
Input no 2 : measurements inhibition
Isolated 0 –24 V DC inputs
Impedance: >10 Kohm
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 moduleIsolated 4-20 mA output
Active output, Max load 500 Ohm
Active output, Max load 500 Ohm
OUTPUT MODULES PRODUCT CODE:RELAY500
4-20 mA output moduleContact rating: 2A/220V
COMMUNICATIONS PRODUCT CODE:WIFI500
Wifi InterfaceConnection to wireless WIFI network
Standard IEEE 802.11b
Secured data transfer by WEP keys
Standard IEEE 802.11b
Secured data transfer by WEP keys
COMMUNICATIONS PRODUCT CODE:ETHER500
Ethernet interfaceEthernet 10 base-T (IEEE 802.3)
Downloads
CEM500-L ONLINE GAS ANALYSER
The CEM500-L is an extractive online gas analyser for Continuous emission monitoring (CEMS).
Description
Features
Parameter Specifications
Accessories
Downloads
Description
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.
Features
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…
Parameter Specifications
ONLINE GAS ANALYZER, CEM500-L – PARAMETER SPECIFICATION
| PARAMETER | RANGE* (PPM) | RANGE* (MG/M3) | DETECTION LIMIT | REPEATABILITY |
|---|---|---|---|---|
| NH3 Ammonia | 0-10 ppm | 0 – 7 mg/Nm3 | 0.1 ppm | 0.01 PPM AT 10 PPM |
| NO Nitrogen Oxide | 0-80 ppm | 0 – 100 mg/Nm3 | 0.5 ppm | 0.2 ppm at 40 ppm |
| SO2 Sulfur Dioxide | 0-30 ppm | 0 – 100 mg/Nm3 | 0.05 ppm | 0.2 ppm at 30 ppm |
| H2S Hydrogen Sulfide | 0-200 ppm | 0 – 400 mg/Nm3 | ||
| NO2 Nitrogen Dioxide | 0-200 ppm | 0 – 400 mg/Nm3 | ||
| CS2 Carbon Disulfide | 0-20 ppm | 0 – 60 mg/Nm3 | ||
| C6H6 Benzene | 0-20 ppm | 0 – 60 mg/Nm3 | ||
| C7H8 Toluene | 0-5 ppm | 0 – 20 mg/Nm3 | ||
| C8H10 Xylene | 0-5 ppm | 0 – 20 mg/Nm3 | ||
| NCL3 Nitrogen Trichloride | 0-20 ppm | 0 – 100 mg/Nm3 |
ONLINE GAS ANALYZER, CEM500-L – GENERAL SPECIFICATION
| Data storage | 5000 measurements for all parameters |
| Interfaces | Internal WIFI and Internal Ethernet |
| Signals | 1 to 8 analog outputs 4-20 mA opto-isolated (option) 1 to 4 relay contacts programmable (option) |
| Display | LCD colour screen (TFT) with LED backlight 640×480 pixels |
| Power supply | 110-240 VAC/ 1000 VA / 50-60 Hz |
| Operating limits | 0 to 40 °C, less than 90% as relative humidity |
| CE standards | Electromagnetic compatibility and safety EN 61010-1, IEC 61010-1 / EN 61326, IEC 61326 |
| Enclosure | Stainless steel IP65 with coating |
| Dimensions | 345 x 525 x 260 mm |
| Weight | 25 kg |
| Sampling gas | Pressure : 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 gas | Pressure : 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) |
Accessories
ONLINE GAS ANALYZER, CEM500-L – ACCESSORIES
SAMPLING PUMP PRODUCT CODE: PUMP500
Internal membrane pump with heated headBuilt-in inside the enclosure
Flow about 6 l/min
Heated version at 190 °C
Flow about 6 l/min
Heated version at 190 °C
INPUT MODULES PRODUCT CODE: IN4-20-500
4-20 mA input moduleIsolated 4-20 mA input
Impedance: 100 Ohm
Impedance: 100 Ohm
INPUT MODULES PRODUCT CODE:LOGIC500
Double logical inputs moduleInput no 1 : external pulse command for measurement
Input no 2 : measurements inhibition
Isolated 0 –24 V DC inputs
Impedance: >10 Kohm
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 moduleIsolated 4-20 mA output
Active output, Max load 500 Ohm
Active output, Max load 500 Ohm
OUTPUT MODULES PRODUCT CODE:RELAY500
4-20 mA output moduleContact rating: 2A/220V
COMMUNICATIONS PRODUCT CODE:WIFI500
Wifi InterfaceConnection to wireless WIFI network
Standard IEEE 802.11b
Secured data transfer by WEP keys
Standard IEEE 802.11b
Secured data transfer by WEP keys
COMMUNICATIONS PRODUCT CODE:ETHER500
Ethernet interfaceEthernet 10 base-T (IEEE 802.3)
COMMUNICATIONS PRODUCT CODE:MTI133
Phone modemIndustrial modem 33,6 Kb/s V34+
DIN rail Mounting
Power supply 24V from the analyser
DIN rail Mounting
Power supply 24V from the analyser
Downloads
