Sitohang, R., Aryeni, I., Maulidiah, H. M., Humaera, R., Toar, H., & Siregar, J. M. (2026). Formalin Detection System in Fish with HCHO Sensor and pH Sensor Using Fuzzy Logic Method. Journal of Applied Electrical Engineering, 10(1), 1–9. https://doi.org/10.30871/jaee.v10i1.11618