PM 10 and PM 2.5 (CAAQMS)

Veritcal View
PM 10 and PM 2.5 (CAAQMS)
Working Principle / Technology Beta Attenuation
Measuring Range 0-10, 0-100, 0-1000 μg/ Nm3
Sampling Time Continuously sampling
Sample flow rate 16.5 Liters/minute
Filter Tape size Manual Calibration Performed check with Zero and Span filters
Span Check 14C (carbon-14), 60 µCi ±15 µCi (2.22 MBq)
Beta Source -30° to +55° C
Operating Temperature Range 0 to 90% RH, non-condensing
Operating Humidity Range 0-1 V, 4-20mA
Analog Output RS 232 / RS 485
Digital Output

PM 10 and PM 2.5 

Vasthi PM 10 and PM 2.5  Particulate Matter Monitors works Principle of Particulate matter10 analyzer uses the technology: Ambient particulate matter, Beta –ray detector for measuring the concentration Particulate matter whose aerodynamic equivalent diameter is smaller than 2.5/10μm on rolled filter tape. The instrument adopts low-radiation C14 as the radioactive source. The emitted β-ray passes through the filter membrane with contaminants and will be received by the detector. The detector[1] is composed of a photo-multiplier tube (or Geiger detector), plastic scintillator, and counter. The thickness can be analyzed quantificational according to β-ray energy that the detector received, and then the PM 10 and PM 2.5 concentration in the air can be calculated received, and then the pm 2.5 and pm 10 concentration in the air can be calculated.


  • Completely Indigious Design
  • 7" TFT Touch Display
  • In-built Data Storage 
  • Error indication like flow, pressure, filter paper, detector error indication
  • User-friendly Calibration check with know concentration
  • In-built Datalogger to push the data to cloud-based server 
  • E-mail alerts for error indications. 
  • Digital Outputs 
What is working Principle of V-air 9009 series

V-air9009 series will work on Beta Attenuation technology

What is National Standard & UE EPA approved / compliance Technology for measuring Particulate Matter

Betaray Attenuation technology

How much time it take for one measurement

Usually for Europe states pollution level very low so they a. collect the sample continuously for 40 minute at 16.5 Liters / minute and make average. For Indian conditions we can measure as per user required time or pollution possibilities

How frequently we need change filter tap

45 days @ 1 hour per sample

Get in Touch

Have a question about our Device? Don’t hesitate to contact us directly using the form on this page or by visiting our office.


Ph. +91 7337418685

Manjeera Trinity Corporate,
Plot No-112, Survey No:1050,
JNTU, Hitech city Rd, KPHB Colony
Kukatpally, Hyderabad-500072

© 2021  Vasthi Instruments. All rights reserved