Design of Alarm and Shutdown System Simulating CO₂ Gas Leakage at SARASSORA Plant Based on Safety Instrumented System Concept

Gas leak detection is important because it can cause something fatal like an explosion, even worse gas is a compound that cannot be seen by the human eye directly. But not many tools related to CO₂ gas has a system that can detect a gas leak either tested or caused by failure of the tool that will provide an indicator or marker in the form of an alarm and flow closure action with a safety instrumented system (SIS). In addition, CO₂ gas is a gas that is harmful to human health. Therefore, designing a device that can detect the presence of CO₂ gas can be a focus. So a tool is proposed that can detect CO₂ gas leaks which can also be used as a practicum or simulation prop. The tool will simulate the occurrence of a gas leak by opening a valve that indicates as if a gas leak has occurred. The results of the detection will be issued on an alarm indicating that there is a CO₂ gas leak. This tool uses the same and identical 2 sensors to minimize the occurrence of false alarms in line with the safety instrumented function (SIF) with a 2oo2 configuration that will work when only the two sensors get identical readings. In addition to the alarm and SIS indicators that are output, the tests carried out produce data that this sensor has an optimal range value of 325 to 1000 ppm. In addition, in this test, the results of the actuators, both alarms and shutdown valves, can work according to the system made.