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Utilizing proprietary technologies of Tunable Diode Laser Absorption Spectroscopy (TDLAS), FPI delivers the LGA system to satisfy in-situ mesurements with high accuracy, fast response, strong reliability and virtually maintenance free.
FPI LGA system is applicable to almost all industrial process, especially well proven in harsh conditions in combination of high temperature, pressure, dust, corrosives and contaminants.
Based on the Tunable Diode Laser (TDL) technology, LGA-4000 is a highly reliable laser gas analysis system that monitors various toxic and hazardous substances (HF, NH3, H2S, HCI) from stack emission with high accuracy, strong reliability and is virtually maintenance-free.
Leveraging an installed base of over 8,000 units, the LGA system has been extensively used for combustion and safety control, process optimization, energy recovery, scientific research as well as environment monitoring. To date, these units have been employed in metallurgy, refinery, petrochemical, natural gas, power plant, waste incineration, cement and other situations where gas measurement is needed.
Principle
TDLAS technology utilizes the principle that laser en-ergy is absorbed selectively by gas to form an absorption spectrum. Laser beams of specific wavelengthsis emitted by semiconductor laser, and when passesthrough the gas, the attenuation of the laser intensityis related with measured gas. The concentration canbe obtained by measuring intensity attenuation.
| Components | O₂, CO, CO₂, H₂O, H₂S, HF, HCl, HCN, NH₃, CH₄, C₂H₆, C₂H₄, CH₃I |
| Accuracy | HF: 0.02ppm; HCl, NH₃, C₂H₂: 0.1ppm; H₂O, HCN: 0.3ppm; CH₄: 0.4ppm; C₂H₆, CH₃I: 0.6ppm; CO, CO₂: 10ppm; H₂S: 20ppm; O₂: 100ppm, at room temperature and pressure with reference to a one-meter optical range. |
| Range | HF: (0~5)ppm; C₂H₆, NH₃: (0~10)ppm; HCN: (0~30)ppm; CH₄: (0~40)ppm; HCl, H₂O: (0~50)ppm; C₂H₆, CH₃I: (0~60)ppm; CO, CO₂: (0~1000)ppm; H₂S: (0~2000)ppm; O₂: (0~1)%Vol, customized. |
| Linearity | ≤±1%F.S. |
| Span Drift | ≤±1%F.S./6 months |
| Response Time | ≤1s |
| Preheating Time | ≤15min |
| Working Temperature | -30~60°C |
| Storage Temperature | -40~80°C |
| Purge Gas | Instrument air, industrial N₂: (0.3~0.8)Mpa |
| Enclosing Rate | IP65 |
| Explosion–Proof | Ex d IIC T5 |
| Power Supply | 24V DC, 220V AC is optional |
| Consumption | ≤20W |
| Analog Outputs | 2 way 4~20mA |
| Relay Outputs | 3 way 24V DC/1A |
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