CO2 Transmitter and Switches for Duct Mounting
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Description
Duct mounted CO2 transmitters and switches of the EE85 series are designed for HVAC applications. The CO2 sensing element uses the Non-Dispersive Infrared Technology (NDIR). A patented auto-calibration procedure compensates for drift caused by the aging of the sensing element and guarantees outstanding long term stability. Installed into a duct a small flow of air will be established by convection through the probe into the transmitter housing and back into the duct. Inside the transmitter housing the air will diffuse through a membrane into the CO2 sensing element. The operation in closed loop air stream avoids pollution of the CO2 sensor. Measuring ranges of 0...2000/5000/10000ppm correspond to an analogue interface of 0 - 5/10V or 4 - 20mA. Selectively a switching output with adjustable switching point and hysteresis is available. The instruments can be easily positioned in the duct with the standard mounting flange. FEATURES » very simple installation » compact housing » auto-calibration » measuring range 0...10000ppm » analogue or switching output TYPICAL APPLICATIONS » building management for residental and office areas » ventilation control
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CO2 Transmitter and Switches for Duct Mounting
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