COMPANY : HARVARD, ENGLAND
These Douglas bag sets offer flexibility and convenience in outdoor metabolic and respiratory studies, various types of muscular exercise and conventional pulmonary function tests. The one-way air valves have a mica disc construction that minimizes resistance. The aluminum alloy tubing valves are equipped with a heavy polyethene washer and have strong, positive action. The polyvinyl chloride gas collection bags have electrically welded seams. They are lighter, tougher and more flexible than other bags and significantly reduce errors caused by gas permeability. A transparent plastic absorbent indicator canister, offered as an accessory, can be connected into the circuit at any desired point and used with a color-indicating CO2 absorbent, see page F65.
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