Design of Multisensor Data Acquisition System (Oxygen, Hydrogen, Temperature, and Pressure) Through Android-Based Website

Data acquisition is a sistem that is required in the use of instrumentation sistems in various industrial activities to retrieve, display, or process data from the sensors contained in the instrumentation sistem components. Along with the development of technology, a data acquisition sistem that can be used in real time, fast, easy, and accurate is required. Internet technology can be used as a data delivery medium to meet the need for data acquisition today. One application of this data acquisition technology can be applied to multisensors to measure oxygen gas, hydrogen gas, temperature, and air pressure levels. The design of this multisensor data acquisition sistem uses Arduino ATMega 2560 microcontroller. The acquired multisensor parameters include oxygen gas content using ME2-O2 sensor, hidrogen gas level using MQ-8 sensor, temperature using K-type thermocouple sensor with MAX6675 module, and air pressure using sensor MPX5500DP. The measurement results of the four sensors are displayed through the website using GSM SIM900 module. From the results of tests conducted in various conditions, obtained the results of testing the level of oxygen gas by 20.989% in normal room and 18.577% in the room with fire, the level of hydrogen gas of 25.8 ppm in the normal room and 2569 ppm in water vapor, the temperature of 28.6 C with error mean by 0.28%, and the air pressure of 6.13 kPa with an average error of 0.21%.