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6020L / 8800L Series

6020L / 8800L Series

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.

Our Advantage:
Rather than resorting to differential measurements, we are using direct measurements. This means no more 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.

We also are using wavelength modulation spectroscopy (WMS). This 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.

The absorption of wavelengths is measured in reference to two other absorption points to compensate for common frequency shift. This allows us to preform permanent wavelength tracking which results in excellent long-term repeatability to minimize analyzer verifications.

Finally, we are using a 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 and Sample System:
The Herriott sample cell has a multi-pass cell with an effective path length of ~33 feet (~10 meters). The sample cell is heated and controlled at 50°C ± 1°C by a wraparound heater. The sample system has 316 stainless steel tubing and fittings with a GenieTM filter along with flow control and precision sample cell pressure regulation.

Product Features:
  • Fully certified for hazardous area
  • Precision temperature control of the sample cell
  • 316 stainless steel sample system with GenieTM filter and pressure regulation
  • Display: IDEC 5.7-inch touchscreen
  • I/O: 1 x 4-20 mA, 2 x alarm contacts TIA-485/232, USB2, Ethernet (supports MODBUS)

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Teledyne Analytical Instruments • 16830 Chestnut St • City of Industry, CA 91748 • USA