Suction in term of the medical field is an act of taking or draining fluid out of the body. A suction pump is an electromedical device which consists of a propulsion tool for a suction system and a vacuum tube as a sucked liquid medium. A modification suction pump equipped with fluid safety aims to facilitate the user to ensure the suction power generated by the suction pump. In addition, the alarm on this tool is also very useful to facilitate the user to know when the liquid is almost full so that the incidence of mucus or fluid in the motor rotation will be decreased because the tool will give an alarm alert when the liquid is almost full. The electronic system consists of ATMega8 microcontroller as the controlling center and MPXV4115VC6U sensor which is used as an air pressure sensor. The testing is done on the vacuum pressure which uses DPM4. The test of the alarm system is also completed. In this study, the highest error result was obtained on the vacuum pressure test of 40 mmHg with the total error of 20%. This situation happens because the smaller the vacuum pressure is adjusted, the voltage changes issued by MPXV4115VC6U sensor will be smaller. Based on the measurement results, it is obtained that the vacuum pressure begins to have 10% errors in accordance to the suction calibration tolerance at 60 mmHg, 93 mmHg, 121 mmHg, 150 mmHg and 187 mmHg vacuum pressures. In the experiment of the alarm system, the alarm can work well. At 15 experiments, the alarm can sound and automatically stop the motor work.