The duration of time that people spend in the toilet and the risk to health posed by indoor air are the most issues that encourage researchers to conduct the study on indoor air. Indoor Air Quality (IAQ) is a terminology of air quality within and around buildings which is pertinent with health and comfort of indoor occupant. Special air quality control devices are effective in finding the source of pollution. These tools are used to detect areas that cause allergies or similar symptoms. They can successfully detect temperature, humidity, and different pollutants. So as the device presented by BEIA, a project partner from Romania.
The device is a Single Board, over which you can attach a plate dedicated to air quality sensors. It has dedicated slots for each sensor because they work differently. In this device, we used the following sensors for air quality:
CO2 – The range of this sensor is between 0 and 5000 ppm. This only worked on the 1st socket of the plate and its life last can exceed 5 years, but it needed calibration.
NH3 – The range of this sensor is between 0 and 100 ppm. It operates on sockets 1, 3, or 5, and the estimated service life is more than one year.
O2 – This sensor has very good accuracy (±0.1%), can be used on socket 1, 3, or 5, and its life period reaches 85% after two years.
Temperature, Humidity, and Pressure Sensor – The temperature sensor works between -40 and 85 ºC with an accuracy of ±1 ºC. The humidity sensor takes values between 0 and 100%, with an accuracy of ±3%. The pressure sensor has a range between 30 Pa and 110 kPa, its accuracy being ±0.1 kPa.
Data taken from these sensors will be transmitted using an additional WI-FI device using the MQTT protocol to a server, after which there will be stored in a database.