Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector6230110.17816/kazmj62301Research ArticleTowards determining the degree of air ionisation in physiotherapy roomsPonizovskyV. M.info@eco-vector.comPopovP. A.info@eco-vector.comKüntzelA. A.info@eco-vector.comPerm Regional Clinical Hospital1511197152677782802202128022021Copyright © 1971, Ponizovsky V.M., Popov P.A., Küntzel A.A.1971<p>To determine the concentration of positive or negative ions in 1 cm3 of air, a Brown electrometer, a stopwatch, an anemometer, a small fan and a thin-walled metal cylinder 5 cm in diameter and 4 cm long, which is fixed to the electrometer measuring electrode. In the middle of the cylinder, a brass grid with a spacing of 1 mm between the strands is fitted.</p>Kazan Medical archiveКазанский медицинский архив