UV Room Sterilizer Automatic Motion Light Pole Based on Time Setting with Internet of Things Android Application

Sterile air is very important and has become a health standard in hospitals. In accordance with the Decree of the Minister of Health of the Republic of Indonesia No. 1204/MENKES/SK/SK/X/2004 concerning Hospital Environmental Health Requirements. UV Room Sterilizer is a tool used to reduce the number of germs in the air. However, UV C rays when exposed directly to parts of the human body can cause acute and chronic health problems on the skin, eyes, and other organs. The author makes a design for a UV sterilizer that is more safety, namely by controlling the timing and starting the tool using Android. This tool also has an hour meter that functions as a UV lamp on-lamp-state reminder. The results of the tool suitability test have a time correction value of 0.81% 1.12% and a relative error of 0.0049% 0.0198%. In the tool that has been made the UV intensity produced on average is 90.3μwatt/cm2 at 200 cm, which means the tool is feasible and in accordance with BPFK standards. The UV room sterilizer that the author made in 1 hour in a 6×4-meter room can reduce the number of germs by 42.02% by 79 CFU/m³.