I’ve searched for the specific term — but there is no standard or widely recognized PIR sensor model named “HW416B” from major manufacturers (like Panasonic, Murata, REES52, or HC-SR501 series).
The is a highly popular, low-cost Passive Infrared (PIR) motion sensor module , frequently identified as a variant of the widely used HC-SR501 . It is a "passive" device, meaning it does not emit energy but instead detects changes in infrared radiation (heat) emitted by humans or animals moving within its field of view. Technical Specifications hw416b pir sensor datasheet better