1. Sampler: 37-mm, 5-µm pore size PVC filter and stainless steel support screen in 37-mm, cassette
filter holder (preferably, conductive).
2. Personal sampling pump, 1 to 2 L/min, with flexible connecting tubing.
3. Microbalance capable of weighing to 0.001 mg.
4. Static neutralizer; e.g. Po-210; replace nine months after production date.
5. Forceps (preferably nylon).
6. Environmental chamber or room for balance (e.g. 20 ± 1 °C and 50 ± 5% RH).