Experimental Assessment of a Variable Orifice Flowmeter for Respiratory Monitoring

Figure 6

(a) Sensor output during 4 hours of trial at 8 L⋅min⁻¹; (b) mean values of sensor output for each interval at 8 L⋅min⁻¹; (c) standard deviation of sensor output for each interval at 8 L⋅min⁻¹; (d) mean values of sensor output for each interval at 4 L⋅min⁻¹; (e) standard deviation of sensor output for each interval at 4 L⋅min⁻¹; (f) picture of the sensor at the end of the 4-hour trial. The formation of condensation within the sensor is evident.