HIDAYATULLAH, SYARIF (2020) RANCANG BANGUN ALAT PENDETEKSI UAP SOLVENT DENGAN MQ-135 BERBASIS NODEMCU ESP8266. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Solvent is a substance that dissolves other substances to form a solution. Where the solution is a homogeneous mixture at the molecular level, when the two substances are mixed at a ratio, the more substance is called a solvent and the other substance is called a gas. Solvents in the form of gases or solids, but the most frequently used are liquids. For example alcohol. Solvent liquid is the raw material used for cooking GLUE. Usually the solvent liquid is found in chemical plants. The effect of solvent can be felt instantly when we enter a room that contains gas due to instant evaporation of solvent, this material can cause fires of minor health problems such as spicy eyes, sore skin, respiratory problems, or allergies. Meanwhile, if inhaled for a long time, this material can cause cancer, liver damage, and nervous system disorders and even death. To avoid this, in this Final Project the author wants to provide an alternative solution as a warning from solvent vapor, which is a solvent-based steam detection device based on NodeMCU ESP8266, this system has 1 input, namely the gas sensor mq-135 as the main sensor of the solvent vapor detector. Relay, Exhaust Fan and buzzer in the area of the solvent liquid placed which is equipped with monitoring through the Thunkable application. The results of this study that the system is made capable of detecting solvent vapor is able to work as it should. When testing the solvent liquid evaporates at 18,748 s and the value of the LCD is 82ppm, the relay output and exhaust fan are off, when the solvent liquid evaporates at 72,712 s and the value of the LCD is 128ppm, the relay output, exhaust fan and buzzer are simultaneously. Key words: solvent vapor liquid, NodeMCU esp8266, MQ-135, Thunkable Application.
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