Adjusts the detection distance. Turning clockwise generally increases the range. Time Delay (TIME):
⚠️ The sensor needs 10–60 seconds to calibrate after power-on. During this time, it may trigger falsely or stay LOW. This is normal. hw-416-b pir sensor datasheet
The module typically features three pins, which are often labeled on the board under the white Fresnel lens. Power input (Positive). Digital output signal (High when motion is detected). Ground (Negative). Adjustment Potentiometers Adjusts the detection distance
Turning this clockwise increases the detection distance (up to 7 meters). Counter-clockwise reduces it (down to ~3 meters), which is useful for small indoor spaces to avoid false triggers. hw-416-b pir sensor datasheet