Design and development of high sensitivity gas detection system for monitoring safety during welding activity in habitat / Mohd. Erwan Mohd Ussdek

In oil and gas environment, safety is the main issue highlighted especially in welding activities. Therefore, this study is an attempt to investigate and design a new mechanism in monitoring the safety via detecting gas concentration level. The objective of this project is to design and develop a new safety precaution system during welding activity in habitat using low cost microcontroller. Furthermore, the study been carried out by divided in three stages; sensing, controlling and notification. Different gas concentration level has been tested and verified for determine the safety range in sensing stage. While, the controlling part control the response based on the detection of the gas in the environment. Indicator and Secure Digital (SD) memory have been used to notify and record the activity in notification stage. At the end of this paper, the system has been successfully designed, developed, tested and verified at prototype level. Besides, the system starts to trigger when sensing level produce 1.416V which represent 30% of gas concentration. Nevertheless, the gas sensor required 10 seconds initialized time to stabilize and produce the desired sensing level.