Tunable Laser Diode
Teledyne’s LGA-4000Z series leverages the latest in Tunable Diode Laser Absorption Spectroscopy (TDLAS) to achieve an ultra-fast gas measurement in-line without resorting to extraction and sample conditioning. By tuning the laser to a specific absorption wavelength, based on the gas of interest, the attenuation of the light through a sample cell and the detector can be correlated to the concentration of each gas, per Beer-Lambert Law. The laser provides a narrow absorption band which minimises the effect of interfering compounds in the process.
LGA-4000Z
Certifications
ATEX and IECEx Zone 1 IIC T6
Response Time
Typically < 1 second (application-dependent)
Power
24 VDC 10 W
Repeatability
± 1% FS
The LGA-4000Z consists of a transmitter, receiver and connection box. The transmitter drives the tunable diode to emit a laser of a certain wavelength to pass through the environment being measured until it reaches the receiver. The receiver then performs a photo-electrical conversion, signal processing and spectrum data analysis to obtain the measuring result. The connection box, containing the I/O Interface, makes the connection of the power cable and the signal cable convenient.
| Gas | Min Range | Max Range | Detection Limit |
|---|---|---|---|
| Acetylene (C2H2) | 0-50 ppm | 0-100% | 0.5 ppm |
| Ammonia (NH3) | 0-10 ppm | 0-100% | 0.5 ppm |
| Carbon Dioxide (CO2) | 0-1000 ppm | 0-100% | 40 ppm |
| Carbon Monoxide (CO) | 0-1000 ppm | 0-100% | 40 ppm |
| Ethylene (C2H4) | 0-100 ppm | 0-100% | 1 ppm |
| Hydrochloric Acid (HCl) | 0-100 ppm | 0-50% | 0.1 ppm |
| Hydrofluoric Acid (HF) | 0-20 ppm | 0-50% | 0.05 ppm |
| Hydrogen Sulfide (H2S) | 0-100 ppm | 0-100% | 5 ppm |
| Methane (CH4) | 0-200 ppm | 0-100% | 10 ppm |
| Oxygen (O2) | 0-1% | 0-25% | 0.01% |
| Water/Moisture (H2O) | 0-100 ppm | 0-100% | 0.1 ppm |