Abstract
Selection of the optimum condensation particle (nucleus) counter (CPC) for any application requires knowledge of the performance characteristics of available, usually commercial, instruments. Performance characteristics are a result of the design of a CPC. This paper describes the designs of three commercial CPCs that use continuous-flow, evaporation/condensation configurations. The paper reviews available data describing the performance of TSI 3010, 3022A, and 3025A CPCs. Data reported by a variety of investigators include detection efficiency as a function of monodispersed NaCl and Ag particles with diameters of 3–100 nm, effect on lower detection efficiency of ambient temperature from 0 to 40 °C, response time for step increase and step decrease of aerosol concentration, effect on detection efficiency of relative humidities of 0–50%, and effect on indicated concentration when feeding high-concentration aerosol to the CPCs. The reference standard is usually a Scheibel–Porstendörfer (1983) aerosol generator with an aerosol electrometer measuring the concentration of singly charged monodispersed aerosol exiting from a differential mobility analyzer. One set of such data has been obtained for Mo(CO) 6 aerosol. Limited data compare the CPCs' detection efficiency with an alternating gradient cloud chamber (NaCl aerosol) and an automatic diffusion battery (WO x aerosol).
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