Quantum Cascade
Multi Laser Analyzer H2O in Naturalgas, LNG, LPG

The challenge!
Natural gas is composed mostly of methane, but it also contains small amounts of ethane, propane, butane, pentane, carbon dioxide, oxygen, nitrogen, volatile organic compounds (VOCs), and sulfur compounds. Methane, a combination of hydrogen and carbon, is formed when plants and animals (organic matter) are trapped beneath the sedimentary layers of the earth.
the challenge!
Since natural gas is a mixture of different gasses with possible quickly change gas concentrations, natural gas sources are generally dirty, corrosive, and at high pressure, the reliable and accurate measurement moisture of is one of the most difficult applications.
The measurement of moisture content in natural gas is very important, from a technical perspective and in order to meet compliance to contractually agreed specifications.

Typical Applications:
• Natural gas dehydration processing
• Natural custody transfer and transmission, gas storage,
• Production of Liquefied Natural Gas (LNG)
• Carbon dioxide for enhanced oil recovery
• Carbon dioxide in carbon sequestration
• Metal heat treating furnace gases
• H2 recycle gas in reforming
• Refinery Platforming processes

The solution
Our innovative photoacoustic spectrometer is based on a patented Helmholtz resonance cell combi-ned with Laser Diode, Tunable Dio-de Laser, or Quantum Cascade La-ser suitable for trace gas and bulk gas detection.
The cuvette incorporate up-to 4 different laser sources this allows us to monitor up-to 8 different tar-get gases simultaneously *

The technology
Our innovative photoacoustic spectrometer powered by is based on patented enhanced Helmholtz resonance cell combined with Tune-able Diode Laser or Quantum Cascade Laser suitable for trace gas and bulk gas detection.
The Laser sources are specifically chosen to provide selective and interference-free measurements.

using NIR and MIR—IR spectroscopy
Our technology offers fast, high-resolution spectroscopy to detect and identify a range of molecules in the Near-IR and Mid–IR wavelength range. Coupled with Tunable Diode Laser (TDL) spectroscopy, a single instrument is now able to broaden insight and monitor both the near and mid-infrared range of spectroscopic light.
In Mid-IR a large choice of absorption peaks can be used. One example is shown below. The absorption peak in MIR is 50 times bigger than in NIR. The LOD is several ppb here.

Many advantages
• No Interference: selective laser sources
• Versatility: The design of the patented PAS cell is independent of the gas detected. To change the molecules detected, one requires just to swap or to tune the QCL to the wavelength of the specific absorption band of the new molecule.
• Zero-Background Technology. as there is no signal as long as there is no gas.
• Robustness: The photoacoustic cell platform does not have any moving parts and is not sensitive to environmental vibrations because of the high-frequency acquisition rate. There are no wavelength-specific optics or mirrors.
• High sensitivity: The PAS can detect ppb levels with a 10-cm path length.
• Fast sensitivity response: due to small internal volume
• Larger than 5 orders of magnitude measurements: 6 orders from ppb to a few %.
• Linearity of the PAS Signal: over the 5 orders of magnitude (i.e. ppm -%) without any deconvolution or interpolation. A calibration function is used outside this linear range.
• Specific measurements: for accurate and specific measurements in complex gas matrices.
• Use of Mid IR lasers (QCL): INNOV’s PAS technology use QCL laser in the Mid IR spectral range. It gives access to fundamentals rays (larger peaks) of most molecules and to the detection of large molecules.

Measurement TechniqueIR—Photoacoustic spectroscopy
Optional additional sensors*• Humidity sensor
• Pressure sensor
• Temperature sensor
• Mass Flow
Linearity*± 1 % of calibration full scale.
Measurements Reproducibility*± 1 % of the signal
Accuracy*± 2 % of the signal
Zero/span driftNegligible due to zero background technique
Instrument failure alarm*up to 4 Potential free configurable. Dedicated alarms available
Process alarm *up to 8 Potential free configurable
Sample Gas Temperature*-10°C to 80°C
Sample Pressure*0.7 to 2 bar
Humidity RangeHumidity Range
Sampling Gas Flow Rates*typical : 150 nL/min
Fluidic circuit:Immune to most Contaminants
Measurement Rate*2Hz continuous
Inputs and outputs*Modbus 4-20mA Digital Signal out RJ-45 for TCP/IP communications
USB portStandard USB port for data back-up
Power Supply100 – 240V 50-60 Hz (on-demand 24DC)
RFI protectionConform to EN 50270 : 2006 (Product type 2)
Area classification*ATEX IEXEx Zone 1 Exd IIC T5
Ambient conditions*-10 – +55°C non condensing

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