In order to decide which pressure sensor should be purchased for the second iteration prototype, the team needed to better understand what the critical functions were important for the sensor to achieve. It was determined that the sensor would be able to continuously read a wide range of pressure values. Research showed that in other suction devices, a pressure range of 80 mbar was recorded so it was determined that the sensor should be able to at least read a range of 5 PSI. In addition, it was important that the values from the sensor would be accurate to one or two decimal places so that data can be accurate and analyzed properly. In addition, the sensor would need to be easily attached to tubing in order to read pressure values inside them. Finally, the sensor should be able to easily integrate into whichever data acquisition product would be used. It was determined that if an Arduino or Raspberry Pi were to be used, I2C communication would be ideal to allow for fast data transfer and ease of communication. Keeping these criteria in mind, the pressure sensor chosen was Adafruit’s MPRLS which is pictured aside.