Respirometer is device used to measure the rate of respiration. This device works in measuring Tidal volume in per minute volume measurement. Technical features are smaller inner dial records 0-1 liter and larger outer dial records 0-100 liters. The dial layout hasseparate small fractional liter and large full liter dials offset with connections of 22mm male BS/ISO taper, inlet and outlet, dial Diameter: 35mm (1.4 in), overall dimensions od70 mm x 60 mm (2.75 in x 2.35 in) and weighing 130 g (4.6 oz).