Main Question or Discussion Point
In a nutshell? i cannot seem to find a lot of information online about these. Could someone please help?
Old post, but updating in case anyone encounters this.It depends on the type of sensor. The most popular is probably the diaphragm design. They are basically just a regular fiber with a diaphragm on the end that is normal to the fiber. Light is sent to the end of a fiber via a fiber coupler and received by a photodiode/phototransistor. As the pressure increases, the diaphragm deforms and causes more light from the fiber to deflect thereby lowering the return intensity/optical path.