The Burntec CO2000 USB Datalogging meter records CO2, Humidity and Temperature which can then be downloaded for viewing and printing on a PC.
Carbon dioxide (CO2) is a gaseous component of the earth's atmosphere. The concentration of CO2 in natural ambient air is about 0.04% or 400ppm.
With each breath, humans convert oxygen (O2) in carbon dioxide (CO2). Although carbon dioxide is invisible and odorless, an increased CO2 content makes it apparent because humans will notice increased fatigue and reduced concentration.
CO2 Levels and Guidelines
|250 ~ 350ppm||Background (normal) outdoor air level|
|350 ~ 1,000ppm||Typical level found in occupied spaces with good air exchange.|
|1,000 ~ 2000ppm||Levels associated with complaints of drowsiness and poor air|
|2,000 ~ 5,000ppm||Level associated with headaches, sleepiness and stagnat, stale, stuffy air. Poor concentration, loss of attention, increased heart rate and slight nausea may also be present|
|5,000 ppm||Exposure may lead to serious oxygen deprivation resulting in permanent brain damage, coma and even death|
CO2 Regulatory exposure limits:
|ASHRAE Standard 62-1989||1000ppm. CO2 concentration in occupied building should not exceed 1000ppm|
|OSHA||5000ppm. Time weighted average over five year 8-hour work days should not exceed 5000ppm|
|Building bulletin 101 (Bb101)||1500ppm. UK standards for schools say that CO2 at averaged over the whole day (i.e 9am to 3.30pm) should not exceed 1500ppm|
|Germany, Japan, Australia, UK||5000ppm. 8 hours weighted average in occupational exposure limit is 5000ppm.|
CO2 in School Classrooms
In the UK, Building Bulletin 101 (BB101) provided the regulatory framework for the adequate provision of ventilation in UK schools based on Part L and F of Building Regulations.
Regarding CO2 concentrations, the recommended ventilation performance standard can be summarised as follows:
Supplied with Meter, USB cable, Software and Manual.