PENGEMBANGAN ALAT PENGAMAN LABORATORIUM MENGGUNAKAN SENSOR PIR BERBASIS IoT

Tujuan penelitian ini adalah (1) Mengetahui pengembangan sebuah alat pengaman laboratorium menggunakan sensor PIR berbasis IOT. (2) Mengetahui fungsional alat pengaman laboratorium menggunakan sensor PIR dapat bekerja secara otomatis dengan mengirimkan informasi berbasis IoT. Penelitian ini dilakukan dengan model pengembangan Waterfall dan Prototype. Hasil penelitian dihasilkan sebuah alat pengaman laboratorium menggunakan sensor pir berbasis IoT. Sensor PIR digunakan sebagai pendeteksi gerakan yang mengirimkan notifikasi kepada user melalui aplikasi Telegram yang sudah di instal pada smartphone. Alat dibuat dengan menggunakan satu colokon USB, satu sensor PIR dan satu modul Esp32 cam yang berfungsi untuk mengirimkan hasil input data sensor ke Internet of Things (IoT) platform yaitu aplikasi Telegram. User perlu terkoneksi dengan jaringan internet untuk mendapatkan notifikasi pada aplikasi Telegram. Hasil pengujian menunjukkan, waktu yang dibutuhkan untuk mengirim dan menerima notifikasi pada aplikasi telegram berkisar pada 1 – 7 detik. Namun demikian, waktu dapat dipengaruhi oleh konektifits jaringan internet yang tersedia. Dengan hasil uji coba functionaltiy didapat hasil presentase kelayakan alat memiliki interpretasi sangat baik atau 100%. Kesimpulan Hasil uji coba alat pengaman yang ditampilkan di aplikasi dan dideteksi sensor PIR yang dapat disimpulkan bahwa sistem secara keseluruhan dapat bekerja dengan baik. Kata Kunci: Alat pengaman laboratorium,PIR, Io

Karakteristik Karbon Aktif Tempurung Kluwak (Pangium edule) sebagai Adsorben pada Penjerapan Methylene Blue

Kluwak (Pangium edule) is a plant that the seeds are used as a seasoning, to produce waste in the form of kluwak shells that the application has not been widely used by the community. This study aims to utilize the carbonized kluwak shell waste as an adsorbent for the absorption of methylene blue, by activating them using potassium hydroxide (KOH) to increase the adsorption ability of the adsorbent. Variations in the concentrations of KOHused are 0, 1, 3, and 5 M and concentrations of methylene blue solution 100, 110, 120, 130, 140, and 150 ppm. The study reviewed how the characteristics of the kluwak shell as an adsorbent on the absorption of methylene blue, including absorption percentage, maximum adsorption capacity through Langmuir equation, adsorbent morphology through Scanning Electron Microscope (SEM) analysis, and surface area. The adsorption process in this study took place in batches for 90 minutes using a shaker with speed of 300 rpm with volume methylene blue solution as much as 50 mL and the weight of the kluwak shell carbon without activation, and KOH 1, 3, and 5 M activated kluwak shell carbon as much as 0.15 g. The results showed that the higher the concentration of KOH, the higher the average adsorption percentage and maximum adsorption capacity. The amount of the average percent absorption, maximum adsorption capacity, and the largest surface area were on the kluwak shell carbon activated by KOH 5 M, were respectively 97.69%; 48.082mg/g; and 174.17 m2/g. The SEM results analysis showed that activated kluwak shell carbon of 5 M KOH had a larger particle size and pore shape, had a more unified shape, and a flake structure than without activation

Karakteristik Karbon Aktif Tempurung Kluwak (Pangium edule) Sebagai Adsorben Pada Penjerapan Methylene Blue

Kluwak (Pangium edule) is a plant that the seeds are used as a seasoning, to produce waste in the form of kluwak shells that the application has not been widely used by the community. This study aims to utilize the carbonized kluwak shell waste as an adsorbent for the absorption of methylene blue, by activating them using potassium hydroxide (KOH) to increase the adsorption ability of the adsorbent. Variations in the concentrations of KOHused are 0, 1, 3, and 5 M and concentrations of methylene blue solution 100, 110, 120, 130, 140, and 150 ppm. The study reviewed how the characteristics of the kluwak shell as an adsorbent on the absorption of methylene blue, including absorption percentage, maximum adsorption capacity through Langmuir equation, adsorbent morphology through Scanning Electron Microscope (SEM) analysis, and surface area. The adsorption process in this study took place in batches for 90 minutes using a shaker with speed of 300 rpm with volume methylene blue solution as much as 50 mL and the weight of the kluwak shell carbon without activation, and KOH 1, 3, and 5 M activated kluwak shell carbon as much as 0.15 g. The results showed that the higher the concentration of KOH, the higher the average adsorption percentage and maximum adsorption capacity. The amount of the average percent absorption, maximum adsorption capacity, and the largest surface area were on the kluwak shell carbon activated by KOH 5 M, were respectively 97.69%; 48.082mg/g; and 174.17 m2/g. The SEM results analysis showed that activated kluwak shell carbon of 5 M KOH had a larger particle size and pore shape, had a more unified shape, and a flake structure than without activation