I am a software engineer. I am working on an experimental project to attempt to measure in real time the variation in air pressure (relative to the ambient pressure of the room) in a piston style apparatus. In this model, I am expectant that there will be a measureable change in the internal pressure as the surrounding air is compressed. I am no clearly physician, so looking to purchase a sensor with a supported SDK. That way I can calibrate the readings within software and produce a real time graph of the variations resulting from compressing the space within the cyclinder. I am seeking recommendations as to the type of sensor readings I would need to measure and an idea of the type of physical sensor I should be looking to purchase. I am hoping the sensor will be reasonable in price as this is just an experiment, which might have an actual real world application. Thanks in advance for any and all suggestions.