Developed from the ground up over 22 years, production of PaPIRs has exceeded 100 million units
PIR Motion sensors are currently garnering major attention, but perhaps only specialists will know exactly what they are. Motion sensors, which are used to automatically turn on lights in toilets, for example, might be more familiar. Motion sensors react to movement and turn lights on and off. PIR Motion sensors are those frequently used for such applications.
Have a look on Takahiro Sono's comprehensive feature on PaPIRs here.