Teledyne’s 6020L and 8800L series of analyzers leverage the latest in Tunable Diode Laser Spectroscopy (TDLAS) to achieve ultra-low, fast and reliable analysis of hydrogen sulfide (H2S), carbon dioxide (CO2) and moisture (H2Ov). By tuning each 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.
Direct Measurements
Not resorting to differential measurements means no switching valves, less hassle disposing of scrubber media, lower cost of ownership, uncertainty of the CO2, CH4 and C2H4 interferences are zeroed and a much faster response/reading time.
Wavelength Modulation Spectroscopy (WMS)
WMS is a method used to significantly increase the sensitivity by reducing the low-frequency noise. The laser light’s intensity is modulated at a high frequency to create a periodic signal to the detector. The signal is then encoded and measured at a high frequency, eliminating the effect of low frequency noise.
Permanent Wavelength Tracking
The absorption of wavelengths is measured in reference to two other absorption points to compensate for common frequency shift. This results in excellent long-term repeatability to minimize analyzer verifications.
Zero Baseline
TDLAS technology uses non-absorbing adjacent wavelengths as a zero point. This is an easier analysis than detecting a small change in a large signal.
Herriott Sample Cell
Multi-pass cell with an effective path length of ~33 feet (~10 meters). The sample cell is heated and controlled at ± 50°C to 1°C by a wrap around heater.
Sample System
This has 316 stainless steel tubing and fittings with a Genie™ filter along with flow control and precision sample cell pressure regulation.
Typical Ranges – H2S
0-10 ppm to 0-20%
Typical Ranges – CO2
0-100 ppm to 0-100%
Certifications
North America Version: CSA Class 1 Div 1 Groups B, C and D T4 (T3 with opt. freeze-proof heater)
CSA Class 1 Div 2 Groups B, C and D T4 (T3 with opt. freeze-proof heater)
International Version: ATEX Zone 2 IIB+H2 T4
ATEX Zone 1 IIB+H2 T4 (pending)
Laser Specification
Class 1
Repeatability
± 2% FS
Linearity
± 1% FS
Response Time
4 seconds
Temperature
+4° to +140°F (-20° to +60°C) for most applications
Ingress Protection
NEMA-4/7 explosion-proof
Inlet Pressure
22 PSIG (1.5 bar G) nominal
Inlet Flow
2-4 SCFH (1-2 SLPM)
Wetted Materials
Tubing/Fittings: 316 stainless steel
Sample Cell: Nickel-plated aluminum
Display
IDEC 5.7-inch touchscreen
Outputs
Analog Outputs: 1 x 4-20 mADC (isolated)
Discrete Outputs: 2 x alarm contacts, concentration and valid data
Communications: TIA-232, TIA-485, RJ-45 Ethernet (supports MODBUS)
Power
100-240 VAC 47-63 Hz, 100W
(Optional) 24 VDC, 100W
Dimensions
Approximately 25″W x 52″H x 12″D
(63.5 x 132.08 x 30.48 cm)
