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LI-7820 N2O/H2O Trace Gas Analyzer

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Measuring N2O and Other Trace Gases in Soil and Air Using LI-COR Trace Gas Analyzers

From soil flux measurements of N2O and CH4, to point-source detection systems, LI-COR Trace Gas Analyzers are the new standard for portable, precise gas measurements.

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Precise, stable N2O measurements

The LI-7820 N2O/H2O Trace Gas Analyzer provides consistent, highly precise nitrous oxide measurements. Equipped to traverse the most extreme and remote locations, the analyzer’s compact, portable design coupled with low power requirements allows for easy deployment and data collection.

LI-7820 N2O/H2O Trace Gas Analyzer

Key specifications

  • Response Time (T10-T90): N2O ≤ 2 seconds, 0 to 330 ppb
  • Precision (1σ):
    • 0.40 ppb at 330 ppb with 1 second averaging
    • 0.20 ppb at 330 ppb with 5 second averaging
  • Measurement Range: 0 to 100 ppm
See the full LI-7820 specs

Applications

  • Soil gas flux measurements
  • Atmospheric monitoring
  • Urban emissions monitoring
  • Mobile emissions monitoring
  • Sensor networks
  • Large area emissions monitoring

Uses in soil flux research

The LI-7820 is ideal for chamber-based measurements in soil gas flux research. The LI-7820 conveniently integrates into both survey and long-term systems, and data can be easily post-processed with SoilFluxPro Software. For CH4 and CO2 measurements, pair it with the LI-7810 CH4/CO2/H2O Trace Gas Analyzer or LI-870 CO2/H2O Analyzer.

For more information on LI-7820 integration with soil gas flux measurements, see the Soil Gas Flux Solutions page.

LI-7820 Preliminary Specifications

General

  • Measurement Technique: OF-CEAS (Optical Feedback-Cavity Enhanced Absorption Spectroscopy)
  • Measurement Rate: 1 sample per second (1 Hz)
  • Optical Cavity Volume: 6.41 cm3
  • Flow Rate: 250 sccm (nominally)
  • Total Weight: 10.5 kg (including batteries)
  • Case Dimensions: 51 cm L x 33 cm W x 18 cm H
  • Operating Temperature Range: –25 °C to 45 °C (without solar load, under normal operating conditions)
  • Operating Humidity Range: 0 to 85% RH (non-condensing, without solar load, under normal operating conditions)
  • Sample Line Humidity Range: 0 to 99.9% non-condensing
  • Operating Pressure Range: 70 to 110 kPa
  • Connectivity: Ethernet, Wi-Fi (not available in some countries)
  • Wi-Fi Compatibility: 2.4 GHz, 802.11 a/b/g/n/ac
  • Power Consumption:
    • Steady State Operation: 22 W at 25 °C
    • Warmup (10.5 to 33 VDC power supply, pins 3 and 4): Up to 100 W with batteries charging
    • Warmup (Universal power supply or 24 VDC power supply, pins 1 and 5): Up to 140 W with batteries charging
    • DC Power Source: 1.3 to 2.3 W (instrument powered off with batteries not charging)
  • Power Supply: Universal Power Adapter (Input: 100 to 240 VAC, 50-60 Hz; Output: 24 VDC)
  • Battery Life: 8 hours typical with 2 batteries

N2O Measurements

  • Measurement Range: 0 to 100 ppm
  • Response Time (T10-T90): N2O ≤ 2 seconds, 0 to 330 ppb
  • Precision (1σ):
    • 0.40 ppb at 330 ppb with 1 second averaging
    • 0.20 ppb at 330 ppb with 5 second averaging

H2O Measurements

  • Range: 100 to 60,000 ppm
  • Precision (1σ):
    • 45 ppm at 10,000 ppm with 1 second averaging
    • 20 ppm at 10,000 ppm with 5 second averaging

Specifications subject to change without notice.

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