International Journal of Computer Applications (0975 – 8887) Volume 183 – No. 36, November 2021 33 Temperature and Water Level Monitoring System at the Entry of Electronic Engineering Laboratory Yoice R. Putung Electrical Engeenering Dept Manado State Polytechnic North Sulawesi - Indonesia Josephin Sundah Electrical Engeenering Dept Manado State Polytechnic North Sulawesi - Indonesia Sukandar Sawidin Information Technology Dept Manado State Polytechnic North Sulawesi - Indonesia Ventje F. Aror Electrical Engeenering Dept Manado State Polytechnic North Sulawesi - Indonesia ABSTRACT During this Covid-19 pandemic, devices for detecting human body temperature and hand washing water are very important so that we can avoid the spread of Covid-19. This study aims to make a Body Temperature Monitoring System and Water Level in the form of a prototype. Using the JSN-SR04T (Ultrasonic Distance Waterproof) Sensor to measure the water level and the MILX90614 Sensor (Non- Contact Temperature Sensor) with the Arduino Uno controller. Information from the height of the water level in the tank and the temperature of the human body can be monitored via the LCD. The method used is the Prototype Design Method starting at the stage of literature study and data collection. The software and hardware design was continued for the need for measuring the water level and temperature. Next is the stage of making the control system on the prototype, then the testing stage. The test results If the water level level is High, the water level indicator is Green, the water level is Medium, the water level indicator is Yellow and when the water level is Low the indicator is a Red led light. informs that the water in the tank must be filled. If the temperature of the human body is < 37 0 C LCD display Temperature is normal, but if the temperature>= 37 0 C LCD display Check to a doctor because there is a risk of contracting Covid 19. General Terms Body Temperature, Water Level Keywords Arduino Uno, LCD, Sensor JSN-SR04T and MILX90614 1. INTRODUCTION During this Covid-19 pandemic, it is very important for us to take care of our health, especially regarding hand hygiene and body temperature. As is well known, it is an appeal from the government for us to maintain cleanliness and health by washing our hands often, if we leave the house we must wear a mask, keep our distance from other people so as not to transmit the Covid-19 disease. The problem is, in accessing the information on the Water Level in the tank, it cannot be known because of the lack of quick monitoring whether the water is still there or has run out and body temperature measurements for lecturers and students still use temperature gauges with thermometers that are in direct contact with officers who are held alternately. by officers and may come into contact with other officers who, without us knowing, may already have Covid-19. Based on the problems stated above, we need a system that can monitor body temperature and water level in the hand washing water storage tank, so a design for a Temperature and Water Level Monitoring system will be made at the Entrance of the Laboratory of the Electrical Engineering Department using the Arduino Uno Microcontroller control. 2. LITERATURE REVIEW 2.1 SENSOR JSN-SR04T JSN-SR04T (Ultrasonic Distance Waterproof)is an industrial standard ultrasonic module with waterproof capability and high measurement accuracy. JSN-SR04T is a developed version of the ultrasonic module HC-SR04 but with the addition of a waterproof feature. Figure 1. Sensor JSN-SR04T 2.2 SENSOR MLX90614 The MLX90614 sensor is a sensor used to measure temperature by utilizing infrared radiation. The MLX90614 sensor is specially designed to detect infrared radiation energy and has been automatically designed so that it can calibrate infrared radiation energy into a temperature scale. The MLX90614 consists of an infrared thermopile detector MLX81101 and signal conditioning ASSP MLX90302 which is used to process the output of the infrared sensor. The thermopile consists of layers or membranes made of silicon and contains a lot of thermocouples so that infrared radiation coming from the object will be captured by the membrane.