The URG Annular Denuder System (URG-3000C), "ADS", collects both acidic and basic gases with little or no interference from sampling artifacts and concentrates samples for characterization by state-of-the-art analytical methods. The ADS is an efficient system which is currently being used in a wide range of research, industry and government studies.



Measurement Capabilities

  • Designed to Meet USEPA's Compendium Method IP-9 and Compendium Method IO-4.2, Determination of Atmospheric Fine Particles and Gases in Ambient Air Using Annular Denuder Technology
  • Accurate Method for Measuring Gases (HNO3, HONO, NH3, SO2, and HCl) and Particles (NO3-, SO4=, and NH4+)
  • Single Day Sampler
  • Concentrates Samples for Characterization by Ion Chromatography



  • 10Lpm Flow Rate
  • 2.5 µm Cutpoint
  • Available as 115VAC or 220VAC


Temperature Regulated Sampling Box:

  • 49.5" x 7" x 7" (125.7 x 17.8 x 17.8 cm)
  • 28 lb (12.7 kg)

Computerized Sampling Pump (Seven Day Programmable):

  • 18" x 14.5" x 11" (45.7 x 36.8 x 27.9 cm)
  • 40 lb (18.1 kg)

Ordering Information

URG-3000C: Simultaneous Collection of Particles and Gas