The compact MiniWRAS is the only portable instrument on the market that allows simultaneous and precise real-time monitoring of both micron-sized and nanoparticles. Designed and specifically built for indoor air quality monitoring, the MiniWRAS is a fit for purpose, state-of-the-art system that combines optical and electrical particle detection in one single device.
Applications include nanoparticle and PM monitoring (e.g. PM₂.₅), monitoring Indoor Air Quality (IAQ) in buildings, IAQ in vehicles, aeroplane cabins, cockpits, buses, and trains, nanoparticle source identification, workplace monitoring, and R&D testing in industry.
How it works
The Mini Wide-Range Aerosol Spectrometer uses a simple laser scatter detection module to detect particles from 0.253 – 35 µm, plus a Faraday Cup Electrometer (FCE) to detect nanoparticles (10 – 193 nm). The FCE is much smaller than a CPC/SMPS+C and does not require a supply of butanol, making it the better choice for portable nanoparticle instruments like the 1371 MiniWRAS.
Servicing
Datasheet
Mini Wide-Range Aerosol Spectrometer (Model 1371)
Specifications
- Measured parameters: dust fractions acc. to EN 481 (inhalable, thoracic, respirable)
- PM₁₀, PM₂.₅, PM₁, number concentration and size distribution, dust mass 0 – 100 000 µg/m3
- Particle size range 10 nm – 35 µm (10 – 193 nm electrical, 0.253 – 35 µm optical)
- Size channels: 41 (10 electrical and 31 optical)
- Particle number: 3 000 – 500 000 p/cm3 (electrical)
- 0 – 3 000 000 p/L (optical)
- Reproducibility: > 97% of total measuring range (optical)
- Detection principle optical light scattering at single particles;
- Detection volume aerodynamically focused, no border zone error
- Optical cell diode laser 660 nm
- Detector fast signal processing with 2 µs pulse length, 2 x 16 raw data channels
- Time resolution: 6 s, 31 channels (storage interval 1 min)
- Detection principle: electrical electrical mobility spectrometer with Faraday Cup Electrometer
- Detector sensitivity: 0.25 fA
- Time resolution 60 s, 10 channels 6 s each (storage interval 1 min)
- Volume flow: 1.2 L/min, ± 3% constant due to self-regulation
- Internal rinsing: air flow rate 0.4 L/min, protects laser optics, reference air for self-test
- Operation GRIMM MiniWRAS software (wireless or data cable)
- Interfaces Bluetooth, USB, RS-232
- Analog input external sensor for temperature and relative humidity
- Power supply in: 100 – 240 VAC, 47 – 63 Hz, out: 18 VDC, 2.5 A
- Battery Li-ion battery, 14.4 VDC, 4.8 Ah for 8 h operation
- Dimensions (h x w x d) 34 x 31 x 12 cm (13.4 x 12.2 x 4.7 in)
- Weight 7.6 kg (16.8 lbs)
- Operating conditions +4 to +40°C (39 – 104°F), RH < 95%, non-condensing
