Rancang Bangun Alat Ukur Massa Jenis Zat Cair Otomatis Menggunakan Sensor Load Cell dan Sensor Ultrasonik Berbasis Arduino Uno
DOI:
https://doi.org/10.25077/jfu.10.1.130-136.2021Abstract
Telah dirancang sebuah alat ukur massa jenis zat cair otomatis berbasis Arduino Uno dengan sensor load cell dan sensor ultrasonik. Sistem ini dirancang dengan menghubungkan sensor load cell dengan modul HX711 untuk mengubah perubahan dari resistansi ke dalam bentuk tegangan. Data yang telah diperoleh kemudian datang oleh mikrokontroller Arduino Uno dengan menggunakan bahasa pemprograman Arduino IDE. Hasil yang diperoleh berupa nilai massa jenis sampel zat cair dari massa dan volume zat cair dalam gelas ukur yang ditambahkan pada LCD. Ketika sampel zat cair telah mencapai 400 mL dari ukuran gelas ukur yang dialirkan melalui pompa mini, maka relay berhenti. Hasil dari penelitian diperoleh bahwa sel beban sensor memiliki nilai sensitivitas sebesar 0,0004 V / g dan nilai offset sebesar 2.2742 V dengan koefisien sebesar R2꞊0.9855. Persentase perbandingan massa jenis air dengan jenis teori diperoleh nilai 3,8%. Nilai tersebut diperoleh dengan kondisi volume zat cair yang dioptimalkan volumenya 400 mL.
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An automatic liquid density measurement instrument based on Arduino Uno has been designed using a load cell sensor and an ultrasonic sensor. This system is designed by connecting the load cell sensor with the HX711 module to convert changes from resistance into voltage. He data that has been obtained is then processed by the Arduino Uno microcontroller using the programming language of Arduino IDE. The results obtained are the liquid samples density value from the liquids mass and volume measured by the measuring cup and displayed on the LCD. When the liquid sample exceeds 400 mL from the measuring cups size, which is flowed through the mini pump, the relay stops. The result of this research is that the load cell sensor has a sensitivity value of 0.0004 V/g and an offset value of 2.2742 V with an average coefficient of R2 ꞊ 0,9982. The percentage ratio of the density of the distilled water sample with the theoretical density obtained a value of 3.8%. The value is obtained with a liquid condition optimized for volume 400 mL with a constant temperature.
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