CO2 Transmitters With Insensitive Infrared Measurement Principle

The new CO₂ transmitter series EE850 and EE820 from E+E Elektronik (Austria) allows 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 aging 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 analogue 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.

The EE820 CO₂ transmitter is designed for particularly demanding applications. The robust, functional housing with a special integrated filter allows for use of the EE820 in polluted environments such as agricultural establishments, stables, incubators, or greenhouses. Excellent temperature compensation means the EE820 can even be used outdoors.

* non-dispersive infrared technology