Found at Zeepreventorium.org. Described as a Mijnhardt spirometer from the late 1960’s. Given the gauges and columns at a guess this system probably performed helium dilution FRC tests as well as spirometry.
Found at Zeepreventorium.org. Described as a Mijnhardt spirometer from the late 1960’s. Given the gauges and columns at a guess this system probably performed helium dilution FRC tests as well as spirometry.