¹ Department of Physics, Faculty of Mathematics and Natural Sciences, University State of Surabaya, Indonesia

* Correspondence: nugrahaniprimary@unesa.ac.id

Polyaniline (PANI) is widely used as a gas-sensing Material because it has an active group that can interact with various chemical compounds. This study examined the responses of PANI thin layers to the aromas of ginger oil and clove oil to understand how the chemical properties of the target molecules Influence sensor performance. The test results showed that the sensor had high stability and repeatability in both samples. In ginger oil, the interaction between gingerol–zingiberene with the amine and amine groups of PANI resulted in an average response time of 34.33 ± 0.47 s and a recovery time of 35.33 ± 0.47 s (at a volume of 1 ml). Meanwhile, clove oil showed a faster response time (30.67 ± 0.47 s) but stronger interactions during the recovery phase. A Relative Standard Deviation (RSD) below 2% throughout the test cycle indicates that the adsorption-desorption mechanism is reversible and consistent. These results confirm that the chemical properties of the target molecule determine the response’s kinetic profile, while the PANI microstructure provides crucial stability in the design of reliable scent sensors.