Benedict Roth Recording Spirometerbmr

  For determination of basal metabolism, by measurement of oxygen consumption. The 6 litre capacity float is fitted with chain compensated counter balance. A thermometer is fitted on the float. Movements of the float are recorded by means of gravity writing ink pen, adjustable by a lever at the bottom. The recording cylinder 12"x6" is of the lift-off type, and is driven by an electrical unit, giving two speeds viz. one rev. in 20 minutes and one rev. in 4 minutes. Speed is chaneged through a lever.