Spirometry Flow can be measured using either the Spirometer Amplifier (FE141) or the Spirometer Pod (ML311) with a suitable flow head.
The Spirometer Amplifier offers a number of advantages over the Pod when recording data for research purposes. The amp contains a precision differential pressure transducer. This makes the amplifier less susceptible to temperature drift than the pod (0.05% full scale per degC). The amp has a greater number of amplification ranges, +/- 20mV to +/-500mV in 5 steps, offering better resolution and more accuracy in the calculated Volume values. Additionally, the amplifier has a wider range of Low Pass filtering options (1, 10 and 100Hz) and has greater long term stability than the pod.