Hospitals as installation of medical services cannot be separated from the presence of a number of pathogenic microbes. The presence of these pathogenic microbes can cause nosocomial infections. In indonesa the data on the incidence of nosocomial infections is still rere, but it is estimated to be quite high considering the state of hospitals and general health is relatively not good. UV sterilization can help to kill germicidal numbers, if the device is connected to electrity, the power supply will provide voltage to each block that is on the module so that the buzzer and hourmeter will stop recording the uv lap life time. When retieving data with atime of 2 hours 20 times the average trial time is 7194 seconds, adeviation of 6 seconds, an error of 0,083%,a standard deviation of 37.842 seconds. For the seconds. For the seconds measurement, 4 hours 20 time the average time for 14395 seconds, a deviation of 4 seconds, an error 0,035%, a standard deviation of 29.105 seconds. For the third measurement 6 hours 20 time the average time for 21595 seconds, a deviation of 5 seconds, error 0,023%, standard deviation of 31.526 seconds.