Measurement of Temperature, CO₂ Concentration, and Humidity in Food Spoilage Gas Using an Electroplated SnO₂ Resistive Sensor
DOI:
https://doi.org/10.26877/lpt.v5i2.594Keywords:
SnO₂ sensor, electroplating, food spoilage, CO₂ concentrationAbstract
Food spoilage is accompanied by changes in environmental parameters, including temperature, carbon dioxide (CO₂) concentration, and relative humidity, which can influence the electrical response of metal oxide semiconductor sensors. This study aimed to fabricate an SnO₂ resistive sensor by electroplating and evaluate its electrical response to environmental variations during food spoilage. The SnO₂ sensing layer was deposited on a Cu substrate by electroplating at 6.0 V and an electrolyte temperature of 40 °C, followed by thermal oxidation. The fabricated sensor was tested in a sealed chamber containing a food sample undergoing natural spoilage, while temperature, CO₂ concentration, relative humidity, and sensor resistance were simultaneously monitored. The results showed that the sensor resistance generally decreased with increasing temperature, CO₂ concentration, and relative humidity. Regression analysis revealed a strong relationship between sensor resistance and temperature (R² = 0.8729), whereas relative humidity showed a moderate relationship (R² = 0.5669). The resistance response to CO₂ concentration also exhibited a distinct nonlinear trend associated with the progression of food decomposition. These findings indicate that temperature and CO₂ concentration exert a stronger influence on the electrical response of the electroplated SnO₂ sensor than relative humidity. The fabricated sensor therefore demonstrates potential as a low-cost resistive sensing platform for monitoring environmental changes associated with food spoilage.
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Data Availability Statement
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Copyright (c) 2026 Ridlo Hajatulloh, Moh. Toifur, Aliaman Aliaman, Indra Budi Setiawan, Okimustava Okimustava, Eko Susanto (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
This journal publishes articles under the Creative Commons Attribution 4.0 International License (CC BY 4.0).
