Concept
LI-COR LI-7815 CO2/H2O trace gas analyser
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL2021/1/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | LI-COR LI-7815 | ||
| Definition | The LI-7815 CO2/H2O trace gas analyser is a high-precision, high-stability, laser-based gas analyser that uses Optical Feedback - Cavity-Enhanced Absorption Spectroscopy (OF-CEAS) to measure gases in air. OF-CEAS is a well-established spectroscopic technique that is described in published literature. The analyser reports and stores in its internal memory CO2 dry mole fractions in air corrected for both the spectroscopic interferences and dilution due to H2O. The LI-7815 has a sample rate of 1 Hz (1 sample per second). Optical cavity volume is 6.41 cubic centimetres, flow rate is 250, 150, or 70 sccm nominally in standard, high altitude, and reduce flow rate configurations respectively. Operating temperature range is -25 to 45 degC and humidity range is 0 to 85% RH. CO2 response time (T10 to T90) from 0 to 400 ppm is < 2 seconds in standard configuration or < 3 seconds in high altitude configuration. CO2 measurement range is 0 to 10,000 ppm. Precision is 0.1 ppm at 400 ppm with 1 second averaging, or 0.04 ppm at 400 ppm with 5 second averaging. Maximum drift is < 0.2 ppm per 24-hour period. H2O measurement range is 100 to 60,000 ppm. Precision is 45 ppm at 10,000 ppm with 1 second averaging, or 20 ppm at 10,000 ppm with 5 second averaging. | ||
| Date | 2024-03-21T10:48:58 | ||
| Identifier | SDN:L22::TOOL2021 | ||
| Note | accepted | ||
| Is Version Of | TOOL2021 | ||
| version | 1 | ||
| Broader | L05:382 |
atmospheric gas analysers | |
| Related | L35:MAN0200 |
LI-COR Biosciences | |
B75:ORG00327 |
LI-COR Biosciences UK Ltd | ||
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