A1.7 - The effect of low humidity air flow on the SAW sensor module with ultra-thin CuPc layer

This contribution reports a stepwise airflow experiment in which the flow rate Q was changed between 25-1250 ml/min while moisture conditions were controlled by a fixed dew point of dp = -19.9°C,correspondingto RH ≈ 5.4%.To avoid scale domination by the carrier frequency, f and f0 were presented as deviations from their meanvalues, while Δf was analyzed directly in Hz.The Δf(t) plot with Q annotations shows distinct transient and quasi-steady responses for each air flow step.Mean Δf values extracted for each Q are summarized by a bar chart, showing an over all increase of Δf with increasing air flow rate.The presented figures provide a compact conference-ready representation of air flow influence on SAW response under controlled low level humidity.