Development of a Portable Respiratory Gas Analyzer for Measuring Indirect Resting Energy Expenditure (REE)

Figure 4

Pictures showing the calibration of the developed respiratory gas analyzer. (a) Setup for calibration of the oxygen and carbon dioxide sensors with standard gas containing oxygen levels of 12.33% and carbon dioxide of 2.99%. (b) Setup for calibration of the volume. By using a commercial calibration syringe, calibration was performed with the total volume of 500, 1000, 1500, 2000, 2500, and 3000 ml.

(a)

(b)