Found on the Steno Museum Collections website. Described as “”Apparatus for electrical recording of lung volume / breath. Desktop m. angled control panel made of plastic and iron in shades of beige, brown and black. Spiral cable m. connector nozzle (transducer), display, indicator lights ‘wait’ – ‘test’ – ‘hours mvv’ tester ‘power’ – ‘zero’, ‘FVC’ – ‘peak flow’ – ‘mvv’, turning the regulator. On the button ‘end of test-override’. On top decal with cleaning instructions.” L: 31 cm, W 31 cm, H: 17.5 cm.
Advertisement from the back page of the British Journal of Anesthesia, volume 46, number 1, 1974.
The Monaghan M403 used a hot-wire sensor. The readout was digital, the rest its electronic circuitry was likely analog. From: The British Journal of Anesthesia, 1974, Vol 46, No.2, Page 1.
Hot wire anemometer? Photo is courtesy of Jim Sullivan, Supervisor, Pulmonary Diagnostic Laboratories at Memorial Sloan-Kettering Cancer Center.
Hot wire anemometer? Photo is courtesy of Jim Sullivan, Supervisor, Pulmonary Diagnostic Laboratories at Memorial Sloan-Kettering Cancer Center.
The diverse, quirky and mostly forgotten history of Pulmonary Function testing