6020L Series

Tunable Diode Laser (TDL) Gas Analyzers



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.


  • Fully certified for hazardous area

  • Precision temperature control of the sample cell

  • User-specified range, 0-100 ppm to 0-100% CO2

  • Explosion proof design, CSA or ATEX certified versions (see options below)

  • Direct near infrared (NIR) detection without complex sample handling

  • Sample system with GenieTM  filter, flow control, precision sample cell pressure regulation and precision temperature control with heater jacket

  • Herriott sample cell with ~33 foot (~10 meter) effective path length

  • IDEC 5.7-inch touchscreen display

  • Analog Output: 1 x 4-20 mADC analog output (isolated)

  • Discrete Output: 2 x alarm contacts for concentration and valid data

  • Communications: TIA-232, TIA-485, RJ-45 Ethernet (supports MODBUS)

  • Power: 100 – 240 VAC, 47 – 63 Hz, 100 watts (optional 24 VDC power)​

  • Display: IDEC 5.7-inch touchscreen


​M​odel 6020L
​Model 6020L
​Typical Ranges
​0-10 ppm to 0-20%
​0-100 ppm to 0-100%
​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
​± 2% FS
​± 1% FS
​Response Time
​4 seconds
​+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
​IDEC 5.7-inch touchscreen
​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)
​100-240 VAC 47-63 Hz, 100W
(Optional) 24 VDC, 100W
​Approximately 25"W x 52"H x 12"D
(63.5 x 132.08 x 30.48 cm)



​File Size​

Model 6020L Brochure​​