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All Journal Jurnal Simetris Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Prosiding SNATIF JURNAL CRANKSHAFT JURNAL TUNAS PENDIDIKAN Jurnal Muria Pengabdian Masyarakat Media Elektrik Jurnal ANDARA (Pengabdian Kepada Masyarakat)
Hera Setiawan
Universitas Muria Kudus
Computer Science & IT Control & Systems Engineering Education Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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IoT-BASED AIR QUALITY MONITORING SYSTEM IN BROWN SUGAR PRODUCTION PROCESS Budi Cahyo Wibowo; Solekhan Solekhan; Arief Susanto; Hera Setiawan
Jurnal Media Elektrik Vol. 22 No. 3 (2025): MEDIA ELEKTRIK
Publisher : Jurusan Pendidikan Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59562/metrik.v22i3.7783

Abstract

Air is one of the sources of human life that can be obtained freely. Good or bad air quality can affect human health and activities. The brown sugar production process often causes air pollution that endangers the surrounding environmental conditions. Based on this problem, in this study, an air quality monitoring system and early warning of air pollution were made. This study focuses on air quality monitoring, namely by detecting the level of harmful gases in the air, equipped with a DHT11 sensor to determine temperature and humidity values, and an MQ-135 sensor to determine the content of harmful gases in the air. Then the value of each sensor data is uploaded to the cloud and monitored in real-time using the IoT Platform. The methods used were to design and manufacture hardware and software for monitoring air temperature and humidity and gas content in the air, calibrating the DHT11 sensor, and testing the performance of the MQ-135 sensor as well as testing the overall system performance. The results showed that the calibration of the DHT-11 sensor had an accuracy rate of 99.7% and an error rate of 0.3%, and the MQ-135 sensor was able to detect the gas content in the air optimally. The results of air quality monitoring in the brown sugar production process obtained that the value of the hazardous gas content exposed to the air is 2300 ppm (CO, CO2, NOx, PM10), From the results of this air quality monitoring, the pollutant gases produced from the production of brown sugar are declared to be poor air quality.   This air quality monitoring and air pollution early warning system can provide information about the air conditions around the brown sugar production area in real-time.
PENGARUH HEAT TREATMENT TERHADAP STRUKTUR MIKRO MATERIAL SKD 11: PENGARUH HEAT TREATMENT TERHADAP STRUKTUR MIKRO MATERIAL SKD 11 Hera Setiawan; Muhammad Luqman Saiful Fikri Luqmqn
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17631

Abstract

Baja perkakas SKD11 merupakan material yang banyak digunakan dalam industri manufaktur untuk aplikasi dies, punch, shear blade, dan berbagai komponen perkakas kerja dingin karena memiliki ketahanan aus yang tinggi, kekuatan tekan yang baik, serta kemampuan pengerasan yang sangat baik. Sifat mekanik baja SKD11 sangat dipengaruhi oleh perlakuan panas yang diberikan, terutama melalui proses hardening, quenching, dan tempering yang mampu mengubah struktur mikro material. Penelitian ini bertujuan untuk menganalisis pengaruh proses heat treatment terhadap perubahan struktur mikro baja SKD11. Metode penelitian dilakukan dengan memberikan perlakuan hardening pada temperatur 1040°C dengan holding time selama 120 menit, dilanjutkan proses quenching menggunakan media pendingin oli. Selanjutnya spesimen mengalami proses tempering pada temperatur 250°C dengan holding time selama 60 menit. Pengamatan struktur mikro dilakukan menggunakan mikroskop optik dengan pembesaran 800× setelah proses preparasi metalografi dan etsa. Hasil pengamatan menunjukkan bahwa struktur mikro material awal (raw material) terdiri atas fasa ferrite dan pearlite. Setelah perlakuan hardening dan quenching, terjadi transformasi struktur mikro menjadi martensite dan cementite yang menunjukkan peningkatan potensi kekerasan material. Proses tempering pada temperatur 250°C menghasilkan struktur mikro berupa martensite temper dan ferrite yang lebih stabil dibandingkan kondisi setelah quenching. Perubahan struktur mikro yang terjadi menunjukkan bahwa perlakuan panas berpengaruh signifikan terhadap transformasi fasa pada baja SKD11.
Co-Authors Akhmad Zidni Hudaya Amiruddin, Muhammad Afif Arief Susanto arrohman, sigit Bagas Widyanto Budi Cahyo Wibowo Cahyono, Candra Dwi Candra Dwi Cahyono Darsi, Helvi Eko Darmanto Fachry Abda El Rahman Fashfahish Shafhal Jamil Jamil, Fashfahish Shafhal Masruki Kabib Masruki Kabib, Masruki Mohamad Nasikhul Umam Muhammad Afif Amiruddin Muhammad Fachrul Rizal Muhammad Luqman Saiful Fikri Qomaruddin Ramadhani, Aufar Nur Rizal, Muhammad Fachrul Rochmad Winarso Setyawan, Malik Slamet Khoeron Solekhan Sutono, Sugoro Bhakti Syafutra, Wawan Taufiq Hidayat Taufiq Hidayat Utama, Deni Alif