Teledyne Analytical Instruments Teledyne Analytical Instruments

Teledyne Analytical
Instruments
LGA 4000 Analyzer
Teledyne Analytical Instruments
Overview
 Theory of Operation
 Electromagnetic Spectroscopy
 Laser Tunable Diode
 Wavelength Selection
 LGA 4000 In-situ Analyzer
 LGA 4000 Extractive Analyzer
 Instrument Specifications
 Applications
Teledyne Analytical Instruments
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Theory of Operation
 Electromagnetic Spectroscopy
E2
photon
Electron Movement
DE = hn
Energy level transition
E1
Nuclei Rotation
Molecules absorb EM radiation
 Raise energy level of electrons at certain wavelengths
 Each molecule has unique frequency response
Nuclei Vibration
Teledyne Analytical Instruments
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Theory of Operation
 Emit EM radiation through sample gas
 Measure absorbance A = log10 (Io/It)
L
I
I
0
t
Gas
 Beer Lambert Relationship
– A=ε•b•c
– ε=molar absorption
– b=path length
– c=gas concentration
Teledyne Analytical Instruments
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Theory of Operation
 Diode Laser Absorption
Spectroscopy
– “Monochromatic” bandwidth
– Bandwidth 0.0001nm
– Adjust laser temperature, current
Teledyne Analytical Instruments
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Theory of Operation
 Laser spectral scan is larger than gas absorption spectral line width
 Reference signal is compared to sample gas signal
 Calculation of T=Tb/Ta provides accurate concentration measurement
Teledyne Analytical Instruments
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Theory of Operation
Teledyne Analytical Instruments
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Theory of Operation
 Spectral analysis of background
gases and sample gas
 Frequency must be found such that
only sample gas is attenuated
Teledyne Analytical Instruments
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LGA 4000 In-Situ Analyzer
Teledyne Analytical Instruments
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LGA 4000 In-Situ Analyzer
Teledyne Analytical Instruments
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LGA 4000 Extractive Analyzer
Teledyne Analytical Instruments
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Analyzer Specifications
In-Situ System
Extractive System
 Optical Path Length: <= 15m
 Optical Path Length: 0.5m or 1.1m
 Response Time: <= 1s
 Response Time: <= 5s (T90)
 Linear Accuracy: <= +/-1% FS
 Gas Temperature: -30 to 140C
 Span Drift: <= +/- 1% FS
 Gas Pressure 0.5 to 3 Bara
 Calibration: 2/year
 Enclosure: IP65
 Explosion Proof: Expxmd IICT5
 Power: 24VDC/110VAC/220VAC
 Ambient Temperature: -30 to 60C
Teledyne Analytical Instruments
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Applications
Gas
LDL
Range
Gas
LDL
Range
O2
0.01% Vol.
0-1% Vol., 0-100% Vol.
CO
40 ppm
0-8000 ppm, 0-100% Vol.
CO2
20 ppm
0-2000 ppm, 0-100% Vol.
H2O
0.03 ppm
0-3 ppm, 0-70% Vol.
H2S
2 ppm
0-200 ppm, 0-30% Vol.
HF
0.01 ppm
0-1 ppm, 0-10000 ppm
HCL
0.01 ppm
0-7 ppm, 0-8000 ppm
HCN
0.2 ppm
0-20 ppm，0-1% Vol.
NH3
0.1 ppm
0-10 ppm, 0-1% Vol.
CH4
10 ppm
0-200 ppm, 0-10% Vol.
C2H2
0.1 ppm
0-10 ppm, 0-70% Vol.
C2H4
1.0 ppm
0-100 ppm, 0-70% Vol.
Teledyne Analytical Instruments
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