In summary, conventional PIR sensors consist of a lens, an optical filter, pyroelectric sensing elements, and an impedance converter. Panasonic’s PIR sensors include these features plus they integrate an amplifier and comparator circuit. The Panasonic one-chip ASIC design saves space, adds electromagnetic shielding, and reduces the number of external components required. Panasonic PIR sensors incorporate a smooth lens surface that provide 64 zones of detection, their long distance sensor has the same design, with a larger lens containing a total of 92 detection zones.