
Connecting the Air Sensor Module
Instrument Guide | 101
Air Sensor Tubing Length and Bubble Size
The response of the air sensor module is highly dependent on the bubble size and
flow rate, and requires a minimum tubing length between the sensor outlet and the
pump inlet. Table 12 lists recommended tubing lengths for various flow rates and
bubble sizes.
Table 12. Recommended air sensor tubing lengths
Flow Rate Bubble Size 1/8" ID FEP Tubing Length
(air sensor to pump inlet)
1 ml/min 15–25 μl ≥6"
5 ml/min 50–100 μl ≥6"
10 ml/min 200 μl ≥6"
100 ml/min 1.05–1.4 ml ≥42"
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