Negative Pressure Cabinet Air Filter Efficiency Alarm System Using Differential Pressure Sensor

A negative pressure cabinet is like an air filter that effectively prevents dust. Spread of germs Because of the situation Spread of coronavirus disease (COVID-19), The use of negative pressure cabinets is increasing. As a result, many air filter performance checks are less effective. Therefore, a negative pressure cabinet air filter efficiency notification system has been designed on the Blynk application platform. The front measurement was performed using the SDP810 differential pressure sensor. Behind the air filter, the control operation with microcontroller STM32G030K8 processes the data received from the sensors into differential pressure and temperature values. Take the pressure difference value from the calculated sensor and change the units to wind speed and wind flow rate. It was averaged as a percentage displayed on an OLED screen air filter efficiency alert in 3 levels. When the efficiency of the air filter drops below 50 percent, it Will always notify with red LED bulbs. When the efficiency of the air filter drops below 25 percent