Hoskin EnvironmentalSampling and monitoring instruments for air, water, weather and soil for the environmental, agricultural, mining and research markets.
Hoskin GeotechnicalMaterials and Product testing for soil, asphalt, petroleum, concrete, mining, cement, and research industries.
Hoskin InstrumentationSensors, transducers and instrumentation for industry, manufacturing, research and development and factory automation.
The LI-7200RS Enclosed CO2/H2O Gas Analyzer is designed for high-speed CO2 and water vapor gas exchange measurements. It combines the performance of a closed path analyzer with the ruggedness and low power demands of an open path instrument.
Ask us about this item
Specifically designed for long-term eddy covariance measurements, the LI-7200RS combines the ruggedness of a field–ready instrument with the precision needed for flux measurements.
The LI-7200RS uses non-dispersive infrared spectroscopy to measure CO2 and water vapor densities in air. It transmits infrared radiation through temperature-controlled optical filters, then through the closed sample path to a thermally regulated lead selenide detector. Some of the infrared radiation is absorbed by CO2 and water vapor in the sample path. Gas densities are computed from the ratio of absorbed radiation to a reference.
Using a patented configuration, the analyzer also measures temperature and pressure of the sampled air at high speeds—synchronously with the gas measurements. These data are combined to compute wet and dry mole fractions at speeds up to 20 measurements per second.
The accumulation of dust, pollen, chemical residues, and other contaminants on the optics of an unfiltered enclosed gas analyzer can lead to measurement drift and cause gaps in datasets. This is not a significant problem if an instrument is filtered and regularly maintained. If an instrument is unfiltered or not maintained, however, there is risk that contaminants will affect measurements.
Innovations in optics and electronics ensure that the LI-7200RS collects more accurate and dependable data—even as contaminants begin to accumulate on the optics.
Data from 13 instruments at 5 sites—with exposure to different levels of contamination—consistently show that the LI-7200RS provides more stable water vapor measurements than the original LI-7200 (Figure 1). CO2 measurements (not shown) are similar to or slightly better than those of the LI-7200.
Specifications subject to change without notice.
Whether you require monitoring or testing instrumentation, rentals or service, we are where you need us to be across Canada.
Copyright - 2024 - Hoskin Scientific
