Ion counter

From Glossary of Meteorology

ion counter

An apparatus that counts the number of unit charges of electricity that are contained in a sampled volume of the atmosphere.

The general procedure is to pass a sample of the atmosphere through a charged cylindrical condenser. The change in the potential across the condenser is a measure of the ionic charge contained in the sample volume. The change in potential depends upon such factors as the polarizing potential of the condenser, the mobility and charge of the ions, volume and length of the condenser, and sample flow rate. An ion counter is an ionization chamber in which there is no internal amplification by gas multiplication.

Copyright 2022 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.