A PIR Sensor, or Passive Infrared Sensor, is an electronic device that detects motion by measuring changes in infrared (IR) radiation emitted by nearby objects. It is commonly used for motion detection in security systems, lighting control, and automation applications. PIR sensors are commonly used in security applications to trigger alarms or activate lighting when motion is detected. They are also utilized in energy-efficient lighting systems to automatically turn lights on or off based on occupancy. PIR technology provides reliable and cost-effective motion sensing capabilities in various electronic and automation systems.

Specifications:

• Detection Method: Passive detection of changes in IR radiation emitted by moving objects.
• Operating Principle: PIR sensors consist of multiple sensor elements that detect heat signatures or changes in heat patterns.
• Sensitivity: Adjustable sensitivity settings to detect motion at different distances and angles.
• Detection Range: Varies by sensor type and model but can range from a few feet to several meters.
• Coverage Pattern: Typically provides a cone or pyramidal coverage pattern, depending on the lens and sensor design.
• Output: PIR sensors provide a digital output signal (high/low) or an analog signal (voltage) when motion is detected.
• Delay Settings: Some PIR sensors allow you to set a delay time for how long the motion signal remains active after detection.
• Power Supply: Typically operated at low voltages, such as 3.3V or 5V, and consume minimal power.
• Applications: Widely used in security systems, automatic lighting control, occupancy sensing, and smart home automation.
• Mounting: Available in various form factors, including through-hole, surface-mount, and integrated into modules or devices.