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2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

New EE80: CO₂, RH and Temperature Transmitter

for Building Control

The Carbon dioxide (CO₂) content in the air is an important parameter for assessing the quality of the air. Everyone knows the effects of high CO₂ concentration during “never-ending” meetings, even if the topics are very interesting: tiredness, sleepiness and headaches. With every breath we take we convert Oxygen (O₂) into CO₂ and by this increase the CO₂ content in the surrounding air. As guideline, the highest CO₂ content of „well ventilated“ air is typically below  800ppm CO₂, while the fresh outdoor air contains around 360ppm (it is typically 400 to 450 in urban areas).

Since a high CO₂ content in the air has a negative impact on comfort and performance, CO₂ measurement is becoming as common as temperature and humidity in buildings. Based on CO₂  measurement one control outside air ventilation to avoid under ventilation or excessive over ventilation that can waste energy.

The new transmitter series EE80 from E+E Elektronik is an ideal choice for building control applications. The EE80 measures the three most important physical quantities for air quality control and comfort: CO₂, relative humidity and temperature.  This is the first transmitter available that accurately measures all three parameters.

The CO₂ measurement principle in EE80 is based on the proven principal of infrared gas detection. The measuring range is 0...2000ppm. A patented self-calibration feature compensates for aging of the infrared source and assures a unique long-term stability for the CO₂ sensor. Relative humidity in the range of 10...90% RH is measured with the proven capacitive E+E humidity sensor . A built in, state-of-the-art microprocessor ensures high accuracy and excellent long term stability.

The EE80 Series transmitters include combination sensing for CO2, relative humidity and temperature.  There is also a CO2 and temperature version. The EE80 humidity sensor  utilizes  plug-in module.  As a result, humidity measurement capability can easily be added to any existing CO2 and temperature EE80.

Click picture to see full screen photo

Contact:

Ing. Werner Hentscholek,

E+E Elektronik GmbH 

Langwiesen 7,

A-4209 Engerwitzdorf, Austria

Tel: +43 7235-605-0, fax: +43 7235-605-8

E-mail: info@epluse.at