The official HW416B datasheet (if you can find it) is usually a 2-page PDF with minimal English. To get a better datasheet:
The HW416B is a popular passive infrared (PIR) motion sensor module, often compared to the HC-SR501. However, finding a can be frustrating. Many available documents miss critical details like retriggering timing, lens specifications, or voltage ripple sensitivity. hw416b pir sensor datasheet better
The stock fresnel lens is cheap plastic. You can the lens with a universal PIR lens (e.g., from a KC7783R) to achieve the claimed 7 meters. Also, the sensor is less sensitive to motion moving directly toward it versus moving across its field of view. The official HW416B datasheet (if you can find
Includes a jumper to switch between L (non-repeatable trigger) and H (repeatable/re-triggerable) modes, allowing you to customize how it responds to continuous movement. Also, the sensor is less sensitive to motion
Compared to older PIR models, the HW-416B is frequently favored for its . While traditional sensors rely on analog circuitry that can be finicky with temperature fluctuations, the HW-416B utilizes a dedicated IC that handles noise filtering internally. Key Specifications at a Glance