6
EN
particle counter BQ21
Technical data
Parameter
Value
Model
BQ 21
Dimensions (length x
width x height)
188 mm x 52 mm x 35 mm
Weight
175 g
Interfaces
USB port for charger
Tripod thread
1/4 inch – 20 UNC
Operating conditions
0 °C to +40 °C with 20 to 80 % RH
Storage conditions
-10 °C to +50 °C with 10 to 90 % RH
Display
2 inch colour LCD with background
illumination
Functions
Alarm function, °C/°F switching
Data storage
5,000 data records on internal memory
Energy
Battery
Li-ion
Nominal voltage
3.7 V
Capacity
1500 mAh
Operating time
approx. 5 hours of continuous
operation
Charging time
approx. 3.5 hours with an alternating
current adapter
Automatic switch-off
3 min, 15 min or 30 min
Temperature measurement
Temperature range
0 °C to 50 °C (32 °F to 122 °F)
Temperature accuracy ± 1 °C (2 °F)
Humidity measurement
Humidity level
measuring range
0 % RH to 100 % RH
Humidity level
accuracy
±3.5 % RH at 20 % to 80 % RH
±5 % RH at 0 % to 20 % RH and 80 %
to 100 % RH
Parameter
Value
Particle counters
Channels (detectable particle
sizes)
2.5 μm, 10.0 μm
Flow rate
0.9 l/min controlled by internal
pump
Counter mode
Concentration
Counting efficiency
100 % for particles > 0.45 µm
(according to ISO 21501)
Zero count
1 count/5 minutes (according
to JIS B9921)
Start delay
5 seconds
Sample inlet
Isokinetic probe
Calibration
Using monodisperse latex
particles (PSL particles;
compliant with NIST)
Light source of the measuring
cell
Laser class 1 (class 3R laser
enclosed in a way to prevent
tampering, 780 nm, 1.5-3 mW,
classified according to
DIN EN 60825-1 and the
Technical Regulations of the
Occupational Health and Safety
Ordinance on Artificial Optical
Radiation (TROS))
Mass concentration
Channels
PM 2.5 / PM 10
Measuring range
0 to 2000 μg/m³
Resolution
1 μg/m³
Scope of delivery
•
1 x Particle counter
BQ 21
•
1 x USB connecting cable
•
1 x Charger
•
1 x Stand with screw
•
1 x Quick guide
