Airoptic
GasEye Extractive
The GasEye Extractive is a versatile gas analyzing tool for industrial process applications. A process gas sample is continuously fed into the analyzer where it is analyzed in real-time utilizing laser absorption spectroscopy.
It can be configured to operate in the near-infrared (NIR), mid-infrared (MIR), and infrared (IR) wavelength range thereby allowing to analyze the majority of gases of interest in the industrial process monitoring.
GasEye Extractive hydrogen sulfide analyzer is assembled in a wall-mounted IP65 enclosure.
Example Applications
- Safety monitoring
- Process Control
- Custody transfer
Example Industries
- Chemical industry
- Petrochemical industry
- Food industry
Features
- Process temperature: 0 – 1350°C
- Real time sensing: response time below 0.2 second
- High selectivity: automatic compensation for interference effect from other constituents in the gas sample
- High sensitivity: detection limits down to ppb range
- In-situ monitoring: direct in the process, no sample preparation
- Maintenance free: equipped with a self-calibrating feature, no field calibration necessary
- Robustness: IP65 enclosure, suitable for outdoor and indoor installations and harsh environments
- Insensitive to dust and smoke in the measured process: up to 50 g/m3
- ATEX version available
Operating principle
GasEye Extractive is a laser spectrometer that uses single line molecular absorption spectroscopy. A semiconductor laser emits a beam of infrared light which passes through the process and impinges the detector on the receiver side. When the target gas is present the light intensity changes and this can be used to determine the concentration of the measured specimen. The wavelength of the radiation emitted by the laser is chosen to match the specific absorption line wavelength of the gas. The laser continuously scans this single absorption line with a very high spectral resolution. The measurement is free of cross-interferences since the laser light is absorbed very selectively by only one specific line in the scanned spectral range.
Influences on the measurement
Temperature
The influence of temperature on the measured absorption line is compensated by internal algorithms. The temperature measurement is used to apply a correction of the temperature on the observed line strength. The temperature measurement is done with an internal sensor.
Pressure
The influence of pressure on the measured absorption line is compensated by internal algorithms. For known pressure values, the GasEye Extractive spectrometer adapts the line shape. The pressure measurement is done with an internal sensor to provide complete mathematical compensation of the pressure influence including the density effect (depending on specific application and target gas).
Interferences
The GasEye Extractive can measure the desired gas components very selectively. It may happen that the absorption line of the measured gas is influenced by the presence of other gases. This influence is compensated by the full shape of the detected signal curve analysis and applying algorithms that corrects the discrepancies accordingly.
Extractive Versions
GasEye Extractive 19″ RACK analyzer is assembled in a standard 19-inch rack 4U version.
The system may also be equipped with auxiliary nitrogen purging. Nitrogen purging is not mandatory for normal operation however in some cases may be used to improve measurement performance when very low levels are to be detected and at the same time, significant changes of ambient methane may be encountered.
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Safety information
GasEye Extractive is classified as a Class 1 laser product. The emitted laser radiation is invisible (near infrared) and not hazardous to an unprotected eye. GasEye Extractive has warning labels placed at positions specified in the EN 60825-1:2014-11 norm.
Electric characteristics
Power input: 24 VDC nominal (19.5 – 30 VDC)
Power consumption: < 75VA with vacuum pump
Mechanical specification
Degree of protection: IP20 to EN 60529
Gas connection: 6 mm tubing
Dimensions: 177 x 440 x 650 mm
Weight: 35 kg for the model with multipass cell, vacuum pump, and safety valves
Materials: Housing: aluminum
Internal process cell: Stainless steel 316
Windows: sapphire
Climatic conditions
Ambient temperature: 5ºC to 40ºC
Ambient pressure: 800 – 1200 hPa
Ambient humidity: RH < 90%, non-condensing
Measurement conditions
Sample gas pressure: 0.05-5 barg
Sample gas temperature: ambient
Sample gas flow: 0.5-20 Ndm3/min
Safety
Low Voltage Directive (LVD) 2014/35/EU
PN-EN 60825-1:2014-11- Safety of laser products – Part 1: Equipment classification and requirements
PN-EN 61010-1:2011- Safety requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements
EMC Directive 2014/30/EU
EN 61326-1:2013-6 – Electrical equipment for measurement, control and laboratory use –
EMC requirements – Part 1: General requirements
RoHS Directive 2011/65/EU
GasEye Extractive wall-mounted analyzer is as easily installed as classic wall-mounted equipment assembled in a …
Measurement conditions:
- Precision: +/- 1% of the measured value or LOD and response time 30 sec
- Accuracy: +/- 2% of the measured value or LOD and response time 30 sec
- Conditioning of the sample: dry, free from oils and particles
- Calibration: factory calibration using certified gas
- Zero drift and span drift: irrelevant
- Sample pressure: 0.05 – 0.3 barg
- Sample temperature: 0°C to 200°C (depends on application)
Climatic conditions:
- Ambient temperature: -30°C to 60°C
- Ambient pressure: 800 – 1200 hPa
- Ambient humidity: RH < 90%, non-condensing
Dynamic performance:
- Ready for measurement: 30 minutes after switching on
- Response time (T90): customizable 3-120 sec
Electrical inputs and outputs
- Inputs:
4 x Analog inputs, (4-20 mA, process temperature and pressure, 2 x AUX) – easy user selection via DIP switch between active/passive mode.
1 x RTD
8 x Digital inputs - Outputs:
4 x Analog outputs, (4-20 mA, gas concentration, process transmission, 2 x AUX) active or passive – easy user selection via DIP switch between active/passive mode
8 x Digital outputs (NAMUR) - Optional:
Modbus TCP/IP,
Modbus RTU - Remote control:
Ethernet for remote operation and diagnostics
Mechanical specification (Figure 2):
- Gas connection: connector 6 mm Swagelok
- Dimensions: 650 x 460 x 230 mm
- Weight: < 60 kg
- Material: Housing: SS 1.4301 (AISI 304)
Internal process cell: SS 1.4404 (AISI 316L)
Cell window: sapphire
Security:
- Low Voltage Directive (LVD) 2014/35/EU
- PN-EN 60825-1:2014-11 – Safety of laser devices – Part 1: Equipment classification and requirements
- PN-EN 61010-1:2011 – Safety requirements for electrical equipment for measurement, control and use in the laboratory – Part 1: General requirements
- EMC Directive 2014/30/EU
- EN 61326-1:2013-6 – Electrical apparatus for measurement, control, and laboratory use. EMC requirements – Part 1: General requirements
- RoHS Directive 2011/65/EU