Practical Comparison of Air Quality Sensors for Indoor CO2 Evaluation
Name
Karl Hendrik Bachmann
Abstract
Due to the COVID-19 crisis, the need for CO2 sensors and other indoor air quality systems has increased in recent years. The aim of the bachelor's thesis is to find the most accurate sensor among budget friendly, widespread hobby sensors CCS811, BME680 and SCD41, thereat evaluating the accuracy of volatile organic compound sensors in the measurement of so-called eCO2. To this end, a Wi-Fi connected measuring device made of a sensor and an ESP32 microcontroller was created, which sent data to the Cumulocity IoT platform. A total of ten devices were used to gather four weeks’ worth of data from four different locations – bedroom, office, classroom, and seminar room. Based on the work, SCD41 is the best performing sensor in terms of measurement accuracy at a competitive price.
Graduation Thesis language
Estonian
Graduation Thesis type
Bachelor - Computer Science
Supervisor(s)
Alo Peets, Jakob Mass
Defence year
2022