Test & Measurement

CO2 transmitter dismisses pollution problems

14th July 2014
Mick Elliott

The new CO2 transmitter series EE850 and EE820 from E+E Elektronik allow highly accurate and reliable measurements of CO2 concentrations up to 10,000 ppm. The applied infrared measurement principle (dual wavelength NDIR procedure) is particularly insensitive to pollution. The transmitter’s autocalibration function automatically compensates for ageing effects.

The multi-point CO2 and temperature factory adjustment procedure leads to excellent CO2 measurement accuracy over the entire working temperature range. The measured values are available as either analog current or voltage outputs. An optional kit facilitates easy configuration and adjustment of the transmitters.

The EE850 CO2 and temperature transmitter for duct mounting is ideal for applications in building management or process control. A mounting flange enables easy installation of the sensing probe directly into the ventilation duct.

The CO2 sensing cell is well protected inside the transmitter. For CO2 measurement, a small amount of air flows through the divided probe, into the transmitter housing, and back into the duct. The temperature sensor is located inside the probe. The EE850 offers an additional option for a passive temperature sensor output with a 2-wire connection.

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