The LI7500A is LI-COR's open-path, high-speed, high-precision, nondispersive-infrared gas analyzer (IRGA). It accurately measures the in-situ densities of carbon dioxide and water vapor in turbulent air structures. In an eddy-covariance application, the LI7500A is used in conjunction with a CSAT3 Sonic Anemometer to determine CO2 and H2O fluxes. The primary components of the LI7500 are the sensor head and the electronics enclosure. The LI7500A, which replaces the LI7500, has added ports for other methods of data retrieval. Features CO2 and H2O open-path analyzer Measures CO2 and H2O surface fluxes using eddy-covariance techniques Includes SDM interface Draws 850 mA from 12-V source Manufactured by LI-COR Specifications Type: Absolute, open-path, nondispersive infrared gas analyzer Detector: Thermoelectrically-cooled lead selenide Bandwidth: 5, 10, or 20 Hz, software selectable Path Length: 12.5 cm (4.72 in.) Operating Temperature Range: -25 to 50C Outputs: RS-232 (20 Hz maximum), SDM (>40Hz) Power Requirements: 10.5 to 30 VDC Power Consumption: 30 W during warm-up, 10 W in steady state Producing Area:USA