4
EN
particle measuring device BQ30
Information about the device
Device description
The air quality monitor serves to detect the mass concentration
of the particle fractions PM2.5 and PM10 as well as the
CO
2
concentration and to measure important climate data such
as the relative humidity and temperature of the air.
Nowadays we humans are almost permanently subjected to an
increased particulate matter pollution – be it near heavily
frequented roads, industrial areas or even in living areas. But
over time the concentration of the CO
2
content also increases
noticeably – particularly in closed or poorly ventilated living
spaces and buildings and with reference to the number of
persons located there.
Ordinary things and tasks such as cooking, vacuuming, candle
or tobacco smoke can be the source of emissions – just like the
emissions from heat sources (e.g. stoves and fireplaces) – and
as such have a direct negative effect on the indoor climate and
consequently the well-being. For an increased concentration of
fine particulates and CO
2
in the air can not only affect the overall
well-being, but also be responsible for difficulties in
concentrating and insomnia as well as for various allergic
reactions. On a long-term basis, the exposure to fine
particulates increases the risk of developing cardiovascular and
respiratory diseases, even pulmonary cancer.
Fundamentally, a distinction is made between the two particle
fractions PM10 and PM2.5 for measuring. PM10 includes all
particles with a maximum diameter of 10 µm and PM2.5 means
all particles with a diameter of less than 2.5 µm These particles
are invisible to the naked eye. As small as they are – especially
the particles of the size PM2.5 – they can reach the pulmonary
alveoli. Yet more minute particles of less than 1 µm can even
reach blood vessels.
To detect the data, the particle measuring device sucks in air for
an adjustable amount of time and determines the mass
concentration of the contained particles.
Particles sized 2.5 μm and 10.0 μm are treated equally during
this process.
The detected values for all active particle sizes are
simultaneously displayed on a colour display. Additionally, the
air contamination is indicated on a colour scale. With respect to
the mass concentration of particle size PM2.5 you can define
limit values preset in the device which, when exceeded, trigger
an acoustic alarm signal. Additionally, a six-level colour display
indicating the respective alarm levels helps you to quickly
assess the current state of the particle concentration ranging
between good and highly critical (see table Alarm limit values
for particle concentration).
The device is equipped with an integrated measuring cell with
laser (class 3R laser, 780 nm, 1.5-3 mW). Owing to the tamper-
proof enclosure it is classified as laser class 1 (DIN EN 60825-1)
according to the Technical Regulations of the Occupational
Health and Safety Ordinance on Artificial Optical Radiation
(TROS) devised by the German Federal Institute for Occupational
Health and Safety. Maintenance and repair work may only be
carried out by trained expert staff observing the legal
regulations.
Alarm limit values for particle concentration PM2.5
Air quality
Value in μg/m
3
Indicator scale
Good
0 to 35 μg/m
3
Green
Normal
35 to 75 μg/m
3
Yellow
Low contamination 75 to 150 μg/m
3
Orange
Moderate
contamination
150 to 200 μg/m
3
Red
High contamination 200 to 250 μg/m
3
Purple
Severe
contamination
> 250 μg/m
3
Dark purple
Alarm limit values for particle concentration PM10
Air quality
Value in μg/m
3
Indicator scale
Good
0 to 75 μg/m
3
Green
Normal
75 to 150 μg/m
3
Yellow
Low contamination 150 to 300 μg/m
3
Orange
Moderate
contamination
300 to 400 μg/m
3
Red
High contamination 400 to 500 μg/m
3
Purple
Severe
contamination
> 500 μg/m
3
Dark purple
Alarm limit values for CO
2
concentration
Air quality
CO
2
value in ppm
Indicator colour
measured result
1
Good
0 to 800 ppm
Green
Normal
800 to 1500 ppm
Orange
Poor
1500 to 9999 ppm
Red
1
In the CO
2
measuring mode the measured results is indicated
in the respective indicator colour.
