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Specifications

General Specifications

  • Measurement Technique: OF-CEAS (Optical Feedback-Cavity Enhanced Absorption Spectroscopy)
  • Measurement Rate: 1 sample per second (1 Hz)
  • Optical Cavity Volume: 6.41 cc
  • Flow Rate: 280 sccm nominally
  • Total Weight: 11.4 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)
  • Operating Pressure Range: 70 to 110 kPa
  • Connectivity: Ethernet and Wi-Fi (not available in some countries)
  • Wi-Fi Compatibility: 2.4 GHz, 802.11g

    Power Requirements

  • Pins 1 and 5: 24 VDC Input; 6 Amps
  • Pins 3 and 4: 10.5 to 33 VDC Input; 8 Amps
  • Power Consumption

  • During Steady State Operation: 22 Watts
  • During Warmup (10.5 to 33 VDC power supply, pins 3 and 4): Up to 90 Watts
  • During Warmup (Universal power supply or 24 VDC power supply, pins 1 and 5): Up to 140 Watts with batteries charging
  • Power Supply: Universal power adapter (Input: 100 to 240 VAC, 50 to 60 Hz; Output: 24 VDC)
  • Battery Life: 8 hours typical with 2 batteries

LI-7810 CH4/CO2/H2O
Specifications

  • Response Time (T10-T90): CH4 ≤ 2 seconds, 0 to 2 ppm
  • CH4 Measurements

  • Range: 0.1 to 50 ppm
  • Precision (1σ):
    • 0.60 ppb at 2 ppm with 1 second averaging
    • 0.25 ppb at 2 ppm with 5 second averaging
  • Max Drift: < 1 ppb per 24-hour period
  • CO2 Measurements

  • Range: 1 to 10,000 ppm
  • Precision (1σ):
    • 3.5 ppm at 400 ppm with 1 second averaging
    • 1.5 ppm at 400 ppm 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

LI-7815 CO2/H2O
Specifications

  • Response Time (T10-T90): CO2 ≤ 2 seconds, 0 to 400 ppm
  • CO2 Measurements

  • Range: 1 to 10,000 ppm
  • Precision (1σ):
    • 0.10 ppm at 400 ppm with 1 second averaging
    • 0.04 ppm at 400 ppm with 5 second averaging
  • Max Drift: < 0.02 ppm per 24-hour period
  • 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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