Harvard Apparatus multi-purpose spirometer, probably from 1970’s to 1980’s.
From: http://www.purplewave.com/cgi-bin/mnlist.cgi?110111/5215/4
Harvard Apparatus multi-purpose spirometer, probably from 1970’s to 1980’s.
From: http://www.purplewave.com/cgi-bin/mnlist.cgi?110111/5215/4
Collins GS1 Lung Analyzer. Manufactured about 1993. Photo provided by Richard Johnston