LI-7810CH4/CO2/H2OTrace Gas Analyzer
When methane matters most
The LI-COR LI-7810 CH4/CO2/H2O Trace Gas Analyzer provides exceptionally stable and precise methane measurements in a design that is both surprisingly portable and affordable. CH4 measurements drift less than 1 ppb per 24-hour period with 0.25 ppb precision (1σ, with 5-second averaging) at 2000 ppb CH4 in dry air at STP.
Achieve the long-term stability and precision needed for atmospheric monitoring, with the flexibility of design for deployments in mobile monitoring or soil flux research.
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Exceptionally stable and precise measurements
When methane matters the most, the LI-7810 provides CH4 measurements with high precision and stability and good CO2 and water vapor measurements.
LI-7810 Long-Term Outdoor CH4 Stability
LI-7810 7-Day CH4 Precision with Allan Deviation Plot
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Choosing your analyzer
The LI-7810 Trace Gas Analyzer is ideal for applications that require long-term CH4 monitoring, or where precision and stability over time is critical. The LI-7810 is also able to provide a CO2 measurement. The CO2 measurements provided by the LI-7810 are appropriate for chamber-based CO2 flux measurements, such as with the Smart Chamber. Learn more about using the LI-7810 for soil gas flux here.
For applications that demand long-term CO2 monitoring and exceptionally precise and stable CO2 measurements, consider the LI-7815.
The LI-7810 is not designed for eddy covariance applications—which requires higher frequency measurements, but as a closed path analyzer it can be used for pCH4 measurements. If you need higher frequency measurements for the eddy covariance method, consider our eddy covariance solutions.
LI-7810 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 in Standard Configuration
- 150 sccm nominally in High Altitude Configuration
- 70 sccm nominally in Reduced Flow Rate Configuration with installed kit
- Total Weight: 10.5 kg (including batteries)
- Case Dimensions: 51 cm × 33 cm × 18 cm (L × W × 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 in Standard and Reduced Flow Rate Configurations
- 50 to 110 kPa in High Altitude Configuration
- Connectivity: Ethernet and 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 Watts at 25 °C without batteries charging
- Warmup: Up to 65 W without batteries charging; up to 100 W with batteries charging
- Off: Up to 2.3 W when powered from pins 3 and 4 without batteries charging; up to 0.2 W when powered from pins 1 and 5 without batteries charging
- Power Supply Requirements:
- Pins 1 and 5 (24 VDC Input): Minimum 6 A at 24 V
- Pins 3 and 4 (10.5 to 33 VDC Input): Minimum 14 A at 10.5 VDC; 6 A at 24 VDC
- Power Supply: Universal Power Adapter (Input: 100 to 240 VAC, 50-60 Hz; Output: 24 VDC)
- Battery Life: 8 hours typical with 2 batteries
- Pollution Degree: 2
- Over-voltage Category: II
- Class 1 Laser Product
CH4 Measurements
- Response Time (T10-T90): all from 0 to 2 ppm
- ≤ 2 seconds in Standard Configuration
- ≤ 3 seconds in High Altitude Configuration
- Range: 0 to 100 ppm
- Precision (1σ):
- 0.60 ppb at 2 ppm with 1 second averaging
- 0.25 ppb at 2 ppm with 5 second averaging
- Maximum Drift: < 1 ppb per 24-hour period
CO2 Measurements
- Range: 0 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: 0 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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