PIR Motion sensor Proftech

PIR Motion sensor 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. PIR Motion sensor are often referred to as PIR, “Passive Infrared”, “Pyroelectric”, or “IR motion” sensors.

PIR sensors are basically made of a pyroelectric sensor , which can detect levels of infrared radiation. Everything emits some low level radiation, and the hotter something is, the more radiation is emitted. motion detector is actually split in two halves. The reason for that is that we are looking to detect motion (change) not average IR levels. The two halves are wired up so that they cancel each other out. If one half sees more or less IR radiation than the other, the output will swing high or low.

PIR Sensor Features;

• Detect motion up to 7 meters away
• Perfect for Raspberry Pi or Arduino Projects
• Easy to use
• Requires soldering of header pins