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LI-8815 AtmospherIQ™ CO2/H2O Gas Analyzer

ATMOSPHERIC BASELINE CO2 MEASUREMENTS FOR THE CURRENT ERA

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The LI-8815 can transform long-term atmospheric CO2 observatories with dependable data and unmatched support. Built with the proven OF-CEAS platform and backed by a 5-year no-questions-asked warranty, the LI-8815 is designed to make atmospheric CO2 monitoring more widespread than ever.

ATMOSPHERIC GAS MEASUREMENTS FOR CONTEMPORARY NEEDS

The optical bench tested by leading networks and proven in LI-COR Trace Gas Analyzers is now optimized for long-term monitoring networks. Performance evaluations show that the LI-8815 CO2 gas analyzer meets or exceeds requirements for leading networks.

CO2 Analysis SpecificationsWMO Compatibility GoalICOS Station SpecificationsLI-8815 Performance
Precision, 1 σShort Period±100 ppb / ±50 ppb*< 50 ppb (1 min)< 40 ppb (5 sec)
Long Period< 25 ppb (1 hour)< 10 ppb (1 hour)
Repeatability (1 σ), 10 min avg< 50 ppb< 45 ppb (8 hour)

* Southern hemisphere

Table 1. LI-8815 CO2 measurement performance meets or exceeds WMO goals and ICOS standards for CO2 gas analysis.
AtmospherIQ LI-8815 CO2 Allan Plot
Figure 1. CO2 stability data from an LI-8815 as it measured continuously flowing tank gas (400 ppm CO2) over a 48-hour period. The Allan deviation plot is the CO2 precision with 1-second averaging. Error bars represent 68% (±1σ) confidence intervals based on the number of averaged time series available at each τ.

ATMOSPHERIC GAS MEASUREMENTS WITH PEACE OF MIND

AtmospherIQ Gas Analyzers feature numerous patented technologies and innovations that ensure high-quality data and long-term operation. The combination of a high-finesse optical cavity, dense data grid created by fixed cavity resonance modes, and tightly controlled cavity temperature and pressure ensures that the AtmospherIQ optical bench satisfies the expectations for contemporary laser-based gas analyzers.

5-Year

Protection

Market-leading 5-year service agreement with loaner instruments included, if needed, comes standard with each analyzer. No questions asked.

Patented

Innovation

Patented technologies optimize the proven Optical Feedback – Cavity Enhanced Absorption Spectroscopy (OF-CEAS) platform for atmospheric monitoring.

Versatile

Pump Options

Vibration-isolated internal pump or optional external pump for versatility.

Battery

Backup

Backup battery power ensures continuous logging and elegant shutdown if main power is lost.

5-Year

Protection

Market-leading 5-year service agreement with loaner instruments included, if needed, comes standard with each analyzer. No questions asked.

Patented

Innovation

Patented technologies optimize the proven Optical Feedback – Cavity Enhanced Absorption Spectroscopy (OF-CEAS) platform for atmospheric monitoring.

Versatile

Pump Options

Vibration-isolated internal pump or optional external pump for versatility.

Battery

Backup

Backup battery power ensures continuous logging and elegant shutdown if main power is lost.

5-Year

Protection

Market-leading 5-year service agreement with loaner instruments included, if needed, comes standard with each analyzer. No questions asked.

Patented

Innovation

Patented technologies optimize the proven Optical Feedback – Cavity Enhanced Absorption Spectroscopy (OF-CEAS) platform for atmospheric monitoring.

Versatile

Pump Options

Vibration-isolated internal pump or optional external pump for versatility.

Battery

Backup

Backup battery power ensures continuous logging and elegant shutdown if main power is lost.

PLUG IN

A SIMPLE ADDITION TO ATMOSPHERIC MONITORING INFRASTRUCTURE

It is simple to add an AtmospherIQ Gas Analyzer to existing monitoring infrastructure.

  • Versatile data management and controls support communication with devices and data management infrastructure.
  • Support for custom software integrations to simplify remote data acquisition, instrument calibration, and system monitoring.
  • Built-in data storage automatically records all measurements, events, and performance excursions for robust data quality analysis and redundancy.
  • Low power operation dispels concerns about marginal main power supplies, with compatibility with global main power standards.
  • Backup battery power ensures continuous logging and elegant shutdown if main power is lost.
  • Simple tubing connections for easy addition to measurement infrastructure.
  • Analyzers mount in a standard 19″ instrument rack, occupying four rack units (4U) each.

LI-8815 Specifications

CO2 Measurements

  • Precision (1σ):
    • 40 ppb with 5-second averaging
    • 15 ppb with 5-minute averaging
    • 10 ppb with 1-hour averaging
  • Drift (1σ), 10 min avg, 8-hr: < 45 ppb
  • Response Time (T10-T90) from 0 to 400 ppm:
    • ≤ 2 seconds in Standard Configuration
    • ≤ 3 seconds in High Altitude Configuration
  • Range: 0 to 10,000 ppm

H2O Measurements

  • Range: 0 to 60,000 ppm
  • Precision (1σ):
    • 20 ppm at 10,000 ppm with 5-second averaging
    • 5 ppm at 10,000 ppm with 5-minute averaging

General

  • Measurement Technique: OF-CEAS (Optical Feedback – Cavity Enhanced Absorption Spectroscopy) direct molecule measurements
  • Measurement Rate: 1 sample per second (1 Hz)
  • Optical Cavity Volume: 6.4 cm3
  • Flow Rate:
    • 250 sccm nominal in Standard Configuration
    • 150 sccm nominal in High Altitude Configuration
  • Total Weight: 18.2 kg (including batteries)
  • Case Dimensions: 56 cm × 48.25 cm × 18 cm (D × W × H)
  • Operating Temperature Range: -25 °C to 45 °C
  • Operating Humidity Range: 0 to 85% RH (non-condensing, without solar load, under normal operating conditions)
  • Sample Line Humidity Range: 0 to 99% non-condensing
  • Operating Pressure Range:
    • 70 to 110 kPa in standard and reduced flow rate configuration
    • 50 to 110 kPa in high altitude configuration
  • Connectivity: Ethernet TCP/IP; RJ45 connector
  • Power Consumption:
    • Steady State Operation: 22 Watts at 25 °C without batteries charging
    • Warmup: Up to 100 W with batteries charging
  • Power Supply Adapter (included): Universal Power Adapter (Input: 100 to 240 VAC, 50-60 Hz; Output: 24 VDC)
  • Battery Life: 8 hours typical with 2 batteries
  • U.S. Patents: 8,659,758; 8,665,442; 8,885,167; 9,116,047; 9,194,742; 9,304,080; 9,581,492; 9,678,003; 9,759,654; 9,759,655; 9,989,729; 10,514,299; 10,527,492 and 11,441,944.

External pump

  • Dimensions: 17 cm × 27 cm × 18 cm (D × W × H)
  • Weight: 4.1kg

Specifications subject to change without notice.

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