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. 2009 May 29;2(3):133–145. doi: 10.1007/s11869-009-0040-4

Fig. 1.

Fig. 1

Components of a: The IVL passive sampler used for collecting nitrogen dioxides and sulfur dioxide. b: The Ogawa passive sampler used for collecting ozone and ammonia: (1) Diffusive barrier end-caps, (2) inner and outer stainless steel screens, (3) reactive filters, (4) retainer rings, (5) over base pads, (6) sampler body