Fine Particulate Sampler



Particulate air pollution is separated into three classifications; coarse, fine and ultrafine particles. Coarse particles have a diameter of between 10µm and 2.5µm and settle relatively quickly whereas fine (0.1 to 2.5µm in diameter) and ultrafine (<0.1µm in diameter) particles remain in suspension for longer.

Our Fine Particulate Sampler AI-102 is precisely designed ambient air sampler for fine dust sampling. The AI-102 is a passive instrument for sampling fine particles (PM2.5 fraction) and is based on impactor designs standardized by USEPA for ambient air quality monitoring. Ambient air enters the series samplers system through an Omni-directional inlet designed to provide a clean aerodynamic cut-point for particles greater than 10 microns. Particles in the air stream finer than 10 microns proceed to a second impactor that has an aerodynamic cut-point at 2.5 microns. The air sample and fine particulates exiting from the PM 2.5 impactor are passed through a 46.2 mm diameter PTFE filter membrane that retains the fine particulate matter. The sampling rate of the system is held constant at 1 m3/hr (16.67 LPM) by a suitable critical orifice. For air flow measurement and flow totalisation of air passed through total sampling duration a dry gas meter is provided in the instrument that gives actual flow rate up to 0.0001 m3/min flow resolution.


  • PM10 and PM2.5 Impactors of sampler based on designs standardized by USEPA.
  • Separation of cabinet into two sections ensures that temperature of PM 2.5 filter remains close to ambient temperature.
  • Brush-less pump with low noise.
  • Same instrument can be used for PM10 and PM2.5 sampling separately.
  • Lower sampling rate of 1m3/hr reduces filter choking even in areas having high FPM levels.
  • Critical Orifice maintains constant sampling rate of 1m3/hour.
  • Compact and portable for convenient field operation.
  • Oil free pump with low noise.


Technical specifications:

  • Sampling rate: Constant sampling rate of 1m3/hr.
  • Particle Size: Omni-directional air inlet with PM 10 separation through an impactor followed by PM 2.5 separation through a WINS Impactor.
  • Unaffected by voltage fluctuation and filter choking maintained by critical orifice system.
  • Filter Media: Filter holder designed to accept 46.2mm diameter PTFE filter paper.
  • Sample Volume: Dry Gas meter records the total air volume sampled.
  • Power Requirement: Single phase AC 220 Volts, 50 Hertz supply.
  • Sampler unaffected by +/- 10% fluctuation in supply.