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Agus Edy Pramono
Magister Program in Applied Manufacturing Technology Engineering, Politeknik Negeri Jakarta, Indonesia
Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Measuring Thermal Conductivity and Magnetic Strength Using Low-Cost Sensors Based on an Open-Source Platform Arduino Nazhmi Fadhila; Filia Solagratia Takasumiang; Hanandira Wistikhirana; Yudha Dewangga; Rafi Pradaya Andareska; Agus Edy Pramono; Iman Setiyadi
Recent in Engineering Science and Technology Vol. 4 No. 2 (2026): RiESTech Vol. 4 No. 2 Years 2026
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v4i2.118

Abstract

The use of low-cost sensors controlled by open-source microcontrollers (Arduino, ESP32) is investigated in this study not only to measure electrical, thermal, and magnetic values ​​but also to investigate intrinsic material properties such as thermal conductivity and magnetic strength. Four sensors are used in this study such as SS49E, MAX6675, ACS712, and HMC5883L. Their performance is evaluated in monitoring a carbon rod subjected to 29.9 V DC current and the measurement results are displayed on a 20x4 I2C LCD and stored in CSV format on an SD Card. The MAX6675 thermocouple sensor shows the most stable and reliable results for surface temperature measurement, which is supported by reference multimeter readings. However, the use of multiple sensors simultaneously reveals interference issues, indicating the need for electrical isolation or signal multiplexing in future designs. This study contributes to the advancement of affordable open-source instrumentation as a viable alternative to commercial measurement tools, emphasizing the shift from raw signal acquisition to meaningful property computation.
Bahasa Inggris Agus Edy Pramono; Iman Setyadi; Aminudin Zuhri; Anissa Puspa Dewi; Nanik Indayaningsih
Recent in Engineering Science and Technology Vol. 3 No. 2 (2025): RiESTech Vol. 3 No. 2 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i2.95

Abstract

This paper compares the electrical conductivity of LLDPE-carbon composite materials, LLDPE-carbon-aluminum composites, and LLDPE-carbon-copper composites. Doping with aluminum (Al) and copper (Cu) metal powders influences electrical conductivity in carbon-based polymer composite materials. Adding metal powders as secondary fillers to a mixture of conductive carbon powders and LLDPE can decrease electrical conductivity. This is due to the agglomeration or clustering of metal powders within the polymer matrix, which disrupts conductive pathways and diminishes the efficiency of electrical charge transfer. The impact of filler type and quantity on electrical conductivity in composite materials was examined, and the findings revealed that factors such as the filler's amount, shape, and dispersal significantly affect the composite's electrical resistance properties. Increasing the amount of metal powder filler raises the composite's viscosity, reducing adhesion between the metal and polymer fillers while promoting metal-to-metal contacts.
Screw Conveyor Design to Reduce Musculoskeletal Disorders (MSDs) Risk in Coconut Shell Handling Fajar Hadi Crisnamurti; Agus Edy Pramono
Recent in Engineering Science and Technology Vol. 3 No. 4 (2025): RiESTech Vol. 3 No. 4 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i04.99

Abstract

This study aims to analyze the working posture of operators involved in feeding coconut shells into a processing machine, using the Rapid Entire Body Assessment (REBA) method. The assessment yielded a total REBA score of 9, which indicates a high level of ergonomic risk requiring immediate corrective action. This elevated score is attributed to repetitive movements during the material handling process. To mitigate the risk of Musculoskeletal Disorders (MSDs), a specially designed portable screw conveyor is proposed as an assistive tool. The proposed conveyor is expected to significantly reduce physical strain and improve the overall ergonomics of the task. Visual illustrations of the design and technical drawing are provided to support the implementation concept. This study highlights the importance of ergonomic interventions in industrial settings to promote worker health and operational efficiency.
Design of a Fertilizer Lifting Crane for the Canycom S25A Fertilizer Spreader Unit Irwan Sukma; Agus Edy Pramono
Recent in Engineering Science and Technology Vol. 3 No. 4 (2025): RiESTech Vol. 3 No. 4 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i04.101

Abstract

Manual lifting of fertilizer bags in plantation operations often leads to musculoskeletal disorders (MSDs) among workers due to repetitive, high-load, and ergonomically poor movements. This study aims to design an ergonomic fertilizer lifting crane integrated into the Canycom S25A Fertilizer Spreader with a 650-liter hopper to reduce physical strain and improve operational efficiency. A hydraulic crane system was designed with dual-segment arms, four lifting hooks, and two hydraulic cylinders, actuated via the unit’s PTO engine. Ergonomic evaluation was performed using the REBA assessment tools. The simulation results indicated that the maximum stress on critical components was within safe limits, with a factor of safety above 1.5. Postural analysis showed a significant improvement, where REBA scores decreased from 12 to 2 after the crane was introduced. The design offers a reliable, low-cost, and easily manufactured solution that enhances worker safety, reduces ergonomic risk, and increases productivity in fertilizer loading processes, especially in rugged field environments. The crane can be adopted in various agricultural applications where safe material handling is essential. Keywords: Ergonomics, Fertilizer Lifting Crane, Hydraulic system, REBA, Agricultural Mechanization
Co-Authors Aminudin Zuhri Anissa Puspa Dewi Fajar Hadi Crisnamurti Filia Solagratia Takasumiang Hanandira Wistikhirana Iman Setiyadi Iman Setyadi Irwan Sukma Nanik Indayaningsih Nazhmi Fadhila Rafi Pradaya Andareska Yudha Dewangga