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Mini Particle Counter BQ21 Trotec PM10/PM2.5
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Trotec BQ21 mini particle counter for measuring PM10 and PM2.5 emissions in sensitive environments. 2-inch color screen with temperature, humidity and real-time color bargraph. Sound alarms based on integrated WHO thresholds. 5,000 record internal memory, Bluetooth transfer to mobile app and PC cloud synchronization. Portable format with tripod thread for regular checks in workplaces, schools and care centers.
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On this order
Estimated delivery
from Wednesday 1 April
Order within 12h 21min
Easy returns
Return possible until 1 May 2026
Mini Particle Counter BQ21 – TROTEC
Compact unit dedicated to emission measurements for monitoring fine dust and climate data in sensitive environments: workplaces, schools, nurseries, care centers and offices.
Main objective: protect people and preserve equipment by ensuring compliance with regulatory limit values.
Complete PM measurements and climate parameters
The BQ21 measures PM10 and PM2.5 fractions according to PM (Particulate Matter) classification, with display in µg/m³ or particle count. It simultaneously displays temperature and relative humidity on its 2-inch color screen. A color bar graph illustrates the particle exposure level in real time.
Integrated WHO alarms and clear display
WHO recommended thresholds are pre-programmed: in case of exceedance, the device emits an audible alarm and highlights the alert via the color interface to enable immediate corrective actions.
Memory, connectivity and advanced analysis
Field ergonomics and continuous monitoring
Portable format equipped with tripod thread and included stand for prolonged measurements. Auto-shutoff function to save energy. Designed for regular controls closest to emission sources.
Understanding the measured particles:
PM10 (type E): respirable particles from construction sites, craft activities, infiltration through open windows.
PM2.5 (type A): alveolar particles from engines, industrial processes, brakes and tires.
For comparison, a human hair measures approximately 50–70 µm, much thicker than these fine dust particles.
Key advantages of the BQ21
About the Trotec brand
Trotec specializes in the manufacturing and distribution of air treatment and precision measurement equipment. Recognized for its innovation and Made in Germany quality, the brand offers a complete range including dehumidifiers, humidifiers and environmental measurement devices. Trotec emphasizes sustainability, energy efficiency and performance to provide reliable solutions for professionals and individuals.
Compact unit dedicated to emission measurements for monitoring fine dust and climate data in sensitive environments: workplaces, schools, nurseries, care centers and offices.
Main objective: protect people and preserve equipment by ensuring compliance with regulatory limit values.
Complete PM measurements and climate parameters
The BQ21 measures PM10 and PM2.5 fractions according to PM (Particulate Matter) classification, with display in µg/m³ or particle count. It simultaneously displays temperature and relative humidity on its 2-inch color screen. A color bar graph illustrates the particle exposure level in real time.
Integrated WHO alarms and clear display
WHO recommended thresholds are pre-programmed: in case of exceedance, the device emits an audible alarm and highlights the alert via the color interface to enable immediate corrective actions.
Memory, connectivity and advanced analysis
- Capacity of 5,000 recordings in internal memory
- Data transfer via Bluetooth to the free MultiMeasure Mobile app (Android/iOS)
- Digital or graphical display of measurements
- Long-term logging and on-site reporting
- Integrated measurement organizer and client module
- Recording with photo and measurement matrices associable to images
- Cloud synchronization with MultiMeasure Studio Professional on PC
Field ergonomics and continuous monitoring
Portable format equipped with tripod thread and included stand for prolonged measurements. Auto-shutoff function to save energy. Designed for regular controls closest to emission sources.
Understanding the measured particles:
PM10 (type E): respirable particles from construction sites, craft activities, infiltration through open windows.
PM2.5 (type A): alveolar particles from engines, industrial processes, brakes and tires.
For comparison, a human hair measures approximately 50–70 µm, much thicker than these fine dust particles.
Key advantages of the BQ21
- PM10/PM2.5 measurement in µg/m³ or particle count
- 2" color screen with simultaneous display + color bar graph
- Integrated WHO thresholds and automatic audible alarm
- Memory 5,000 results, Bluetooth export
- MultiMeasure Mobile: Logging, graphs, reporting, organizer, client module
- Recording with photo, measurement matrices, cloud sync to PC
- Tripod thread + included stand, automatic shutoff
About the Trotec brand
Trotec specializes in the manufacturing and distribution of air treatment and precision measurement equipment. Recognized for its innovation and Made in Germany quality, the brand offers a complete range including dehumidifiers, humidifiers and environmental measurement devices. Trotec emphasizes sustainability, energy efficiency and performance to provide reliable solutions for professionals and individuals.
| Brand | Trotec |
| SKU | 1473746389 |
| EAN/GTIN | 4052138095812 |
| MPN | 3510205095 |
| Category | Emission Measurement |
| Condition | New |
Dimensions and weight
Length: 188 mm
Width: 52 mm
Height: 35 mm
Weight: 175 g
Display and interface
2-inch color LCD screen with backlight
USB port for charger
Tripod thread: 1/4 inch – 20 UNC
Operating conditions
Operation: 0 °C to +40 °C with 20 to 80 % RH
Storage: -10 °C to +50 °C with 10 to 90 % RH
Main functions
Alarm function
°C/°F switching
Adjustable auto shut-off: 3 min, 15 min or 30 min
Delayed start: 5 seconds
Temperature and humidity measurement
Temperature range: 0 °C to 50 °C (32 °F to 122 °F)
Temperature accuracy: ±1 °C (2 °F)
Humidity range: 0 % RH to 100 % RH
Humidity accuracy: ±3.5 % RH from 20 % to 80 % RH, ±5 % RH from 0 % to 20 % RH and 80 % to 100 % RH
Particle measurement
Channels: PM 2.5 and PM 10
Detectable sizes: 2.5 μm and 10.0 μm
Measurement range: 0 to 2000 μg/m³
Resolution: 1 μg/m³
Flow rate: 0.9 l/min managed by internal pump
Counting mode: Concentration
Counting efficiency: 100 % for particles > 0.45 μm (according to ISO 21501)
Zero count: 1 count / 5 minutes (according to JIS B9921)
Sample inlet: Isokinetic probe
Calibration: By monodisperse latex particles (PSL particles according to NIST)
Light source: Class 1 laser (encapsulated class 3R laser, 780 nm, 1.5-3 mW, compliant with DIN EN 60825-1 and TROS regulation)
Connectivity
Frequency range: 2.4 GHz
Max. transmission power: 10 dBm
Battery and autonomy
Type: Li-ion
Nominal voltage: 3.7 V
Capacity: 1500 mAh
Autonomy: approximately 5 hours of continuous operation
Charging time: approximately 3.5 hours with power adapter
Data recording
Internal memory capacity: 5,000 records
Product information
Brand: Trotec
Model: BQ 21
Supplier reference: 3510205095
EAN code: 4052138095812
Classification: EQUIPMENT
Length: 188 mm
Width: 52 mm
Height: 35 mm
Weight: 175 g
Display and interface
2-inch color LCD screen with backlight
USB port for charger
Tripod thread: 1/4 inch – 20 UNC
Operating conditions
Operation: 0 °C to +40 °C with 20 to 80 % RH
Storage: -10 °C to +50 °C with 10 to 90 % RH
Main functions
Alarm function
°C/°F switching
Adjustable auto shut-off: 3 min, 15 min or 30 min
Delayed start: 5 seconds
Temperature and humidity measurement
Temperature range: 0 °C to 50 °C (32 °F to 122 °F)
Temperature accuracy: ±1 °C (2 °F)
Humidity range: 0 % RH to 100 % RH
Humidity accuracy: ±3.5 % RH from 20 % to 80 % RH, ±5 % RH from 0 % to 20 % RH and 80 % to 100 % RH
Particle measurement
Channels: PM 2.5 and PM 10
Detectable sizes: 2.5 μm and 10.0 μm
Measurement range: 0 to 2000 μg/m³
Resolution: 1 μg/m³
Flow rate: 0.9 l/min managed by internal pump
Counting mode: Concentration
Counting efficiency: 100 % for particles > 0.45 μm (according to ISO 21501)
Zero count: 1 count / 5 minutes (according to JIS B9921)
Sample inlet: Isokinetic probe
Calibration: By monodisperse latex particles (PSL particles according to NIST)
Light source: Class 1 laser (encapsulated class 3R laser, 780 nm, 1.5-3 mW, compliant with DIN EN 60825-1 and TROS regulation)
Connectivity
Frequency range: 2.4 GHz
Max. transmission power: 10 dBm
Battery and autonomy
Type: Li-ion
Nominal voltage: 3.7 V
Capacity: 1500 mAh
Autonomy: approximately 5 hours of continuous operation
Charging time: approximately 3.5 hours with power adapter
Data recording
Internal memory capacity: 5,000 records
Product information
Brand: Trotec
Model: BQ 21
Supplier reference: 3510205095
EAN code: 4052138095812
Classification: EQUIPMENT
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