Design of a Smartphone Plastic Optical Fiber Chemical Sensor for Hydrogen Sulfide Detection

We present a low-cost, handheld plastic optical fiber (POF) sensor for hydrogen sulfide (H ₂ S) detection integrated onto a smartphone. The sensor uses smartphone flashlight as a source and camera as a pixel-based intensity detector. The POF is interconnected to the smartphone with a 3-D-printed connector on both source/detector sides. The...