20pcs HC-SR501 Adjustable Infrared IR Pyroelectric PIR Module Motion Sensor Human Body Induction Detector With Bracket

Features 1 Automatic induction When someone enters its induction limits enter the high level people leave the sensor range is automatically delayed off high Output low 2 photosensitive control optional the module reserved for location can be set to photosensitive control strong light during the day or not induction Photosensitive control is optional the factory did not install the photosensitive resistor If necessary please buy a separate photosensitive resistor to install 3 Two trigger modes L is not repeatable H is repeatable Can be jumper selected the default is H A non repeatable trigger mode the induction output high the delay time is over the output will automatically change from high to low B Repeated trigger mode that is after sensing the output high in the delay time period if the human body in its sensing limits of activities its output will remain high until the delay after the person will leave the high The level changes to low level the sensing module automatically delays a delay time after every activity of the human body and takes the time of the last activity as the starting point of the delay time 4 Induction blocking time default setting 3 4 seconds After each sensing output high level goes low the sensing module can be followed by a blocking time during which it is sensed The device does not receive any sense signals This function can be used to achieve the interval between the sensing output time and the