The Wright Peak Flow Meter (0974)
Info
Medical instrument to measure the maximum expiratory flow rate. Among others used for the treatment of astma patients. Made by Airmed Ltd from 1959 onwards.
The dial goes from 60 to 1000 liters per minute. Reset is done by pressing the small knob next to the moutpiece.
The box is from cardboard and has a pink color.
References/Links/More Info
Welsh Museum of Health & Medicine