PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they are commonly found in appliances and gadgets used in homes or businesses. They are often referred to as PIR, "Passive Infrared", "Pyroelectric", or "IR motion" sensors.
Higher in cost-performance
2.Working Conditions (T=25°C, Vdd=3V，Except other requirements)
Sensitivity threshold value
Output Low Current
Output High Current
Output Low current Lock time
Output High current Lock time
Voltage Input Range
0V to VDD/2
Input Bias Current
Oscillator & Filter
Low pass filter cut-off frequency
High pass filter cut-off frequency
Oscillator frequency on Chip
Interior Block Diagram
Wireless Devices/Mobile Equipment
Wireless occupancy sensors (powered by PV cells or battery)
PC and smart phones
Commercial & residential lighting fixtures
1.How long do motion sensor lights stay on?
Most people set their motion detection lights so they will stay on for about one to two minutes.
2.Do motion sensors save electricity?
Motion sensing switches do have some “phantom” energy use. According to this study, motion sensor switches use about a watt of energy on standby mode (23 hours a day) and 5 watts on active mode (about an hour a day). This trims a bit off of your overall savings.