CO2 and temperature transmitter for duct mounting

Paul Boughton

The new EE850 CO2 and temperature transmitter from E+E Elektronik is suitable for applications in process control. The device allows highly accurate and reliable measurements of CO2 concentrations up to 10,000 ppm. The applied infrared measurement principle (dual wavelength non-dispersive infrared technology procedure) is particularly insensitive to pollution. The transmitter’s autocalibration function automatically compensates for aging effects.

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 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. The EE850 offers an additional option for a passive temperature sensor output with a 2-wire connection. An optional kit facilitates easy configuration and adjustment of the transmitter.