PT. X is a plant in rubber production. Rubber factories in some material handling activities still use material handling manually and depending on the worker, physical requesting from these workers needs to be considered the factors that influence it. The research objective is to study any factors related to the work of employees in the production department of PT. X. The method used in this study is a cross-sectional study that is research carried out or collected simultaneously at the same time, this is done in order to get the good results. The results in this study obtained factors that have an effect on the physical, sex of employee with physical employee with a value of P value = 0,000 and work intensity of employees with physical employees with a value of P value = 0,000.
Indoor air pollution is a very serious health issue in comparison with outdoor air conditions. The current pandemic of COVID-19 causes people to remain indoors at all times. It is unimaginable that during this pandemic a smog-related disaster could occurs that could aggravate human respiratory diseases, thus requires additional air quality monitoring which can filter clean air into the room. The purpose of this study is to produce a prototype of air quality control that can provide a good air circulation system and hold the temperature and humidity in the room. This research was conducted with an Arduino Uno microcontroller and an MQ-135 gas sensor to detect CO2 gas and a DHT-22 sensor for measuring room temperature and humidity by comparing the results of using a HEPA filter. The research results of the prototype make it possible to generate the room temperature using a HEPA filter and air humidifier whose average is 27.7°C. Another parameter that is performed is the CO2 measurement, it is found that the average CO2 in the test using a HEPA filter and an air humidifier is 496 PPM.
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