From Medical Instrumentation for Healthcare, by Cromwell L, Arditti M, Weibell FJ, Pfeiffer EA, Steele B, Labok J. Published by Prentice-Hall, 1976. Page 264.
Tag Archives: National Cylinder Gas
National Cylinder Gas Pulmonary Function Indicator, circa 1970’s
National Cylinder Gas Pulmonary Function Indicator, probably manufactured in the 1970’s. Used a hot-wire transducer to measure flow. Taken from an Ebay listing.
Spirometer, National Cylinder Gas Pulmonary Function Indicator, 1974
National Cylinder Gas (division of Chemtron) Pulmonary Function Indicator, 1974. Used a hot-wire transducer to measure gas flow.
From: Burton RM, Kozel WM, Penley RP, Ward GH, Chapman RS. Application and evaluation of portable field instruments for measuring Forced Expiratory Volume of children and adults in environmental health surveys. Environmental Health Perspectives, 1974; 8: 123-131. Page 125.