About

A gaseous sampling attachment is a device used to collect representative air samples for monitoring pollutants like sulfur oxides (

SOxcap S cap O sub x

), nitrogen oxides (

NOxcap N cap O sub x

), ammonia (

NH3cap N cap H sub 3

3

), and ozone (

O3cap O sub 3

3

). It is typically an accessory for other air samplers and works by drawing a small amount of air through a liquid absorbent or solid adsorbent for analysis. These attachments often include features like thermoelectric or ice-based cooling to prevent evaporation of the absorbing solution, flow control, and multiple inlet/outlet ports for concurrent sampling of various gases.

• Gaseous pollutant monitoring: Designed to capture pollutants such as
  

  SOxcap S cap O sub x
  ,
  

  NOxcap N cap O sub x
  ,
  

  NH3cap N cap H sub 3

  3
  , and
  

  O3cap O sub 3

  3
  .
• Sampling method: Collects gases by passing them through a liquid medium (absorption) or on a solid adsorbent.
• Cooling system: Employs thermoelectric cooling or an ice bath to maintain the desired temperature of the absorption solution, ensuring a more accurate sample by preventing gas evaporation.
• Flow control: Features allow for precise control of the air flow rate, which is often lower for gaseous sampling compared to particulate sampling (typically a few liters per minute).
• Interface compatibility: Can be attached to other air sampling systems, such as dust samplers, via a suction port and mounting hardware.
• Portability: Some designs include an icebox or impinger tray that can be removed and taken directly to the lab for safer handling of the samples.
• Multi-port design: Can often sample up to four gases simultaneously with independent flow control for each gas.