Able to accurately measure CO<sub>2</sub> concentrations up to 10,000 ppm, EE850/EE820 series apply dual wavelength NDIR (non-dispersive infrared) procedure that is insensitive to pollution. Also, autocalibration function automatically compensates for aging effects. Multi-point CO2 and temperature factory adjustment procedure leads to optimal CO2 measurement accuracy over entire working temperature range, and measured values are available as analog current or voltage outputs.
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