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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
Bluetooth
Frequency range: 2.4 GHz
Max. transmission power: 10 dBm
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
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 BQ21
• 1 x USB connecting cable
• 1 x Charger
• 1 x Stand with screw
• 1 x Quick guide
