Spirometer, LSE Vanguard DS-601, circa 1980

Spirometer_LSE_Vanguard_DS601

Used a disposable pneumotach (plastic body with filter paper mesh).  Manufactured by the LSE corporation in the 1980’s.  There was an optional strip chart recorder for volume-time curves.  Numerical results were displayed one at a time on the digital front panel by pressing a button to step through them.  Taken from: http://www.ebay.com/itm/like/271258328169?lpid=82

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