Before understand the Best PIR sensor LED lamp outdoor, we need to know the PIR sensor’s working principle and application scenarios, then we can better understand and utilize this technology to bring more convenience and security to life and work.

What is PIR Sensor?

A PIR sensor, the full name of which is “Passive Infrared Sensor”, is also known as a pyroelectric infrared sensor. It is an electronic component that can detect infrared radiation emitted by the human body or other objects.

How does the PIR sensor work?

The PIR sensor works by sensing the infrared radiation emitted by the human body. It uses a dual sensor structure, differential signal detection, time filtering and other principles to determine whether there is the presence of human activity, realise the human body detection and trigger the signal.

1. Infrared radiation sensing
PIR sensors are based on infrared radiation sensing. The normal human body releases infrared radiation wavelengths, mainly in the 9-10um range. When a person enters the detection range of a PIR sensor, the sensor senses the infrared radiation emitted by the human body.

2. Dual Sensor Architecture
PIR sensors typically contain two separate sensors inside the sensor, called Pyroelectric Devices. These two sensors are placed on an inverted prism facing each other. When the human body enters the detection range, the two sensors feel the infrared radiation emitted by the human body and generate a corresponding electric charge.

3. Differential Signal Detection

The sensors perform a differential operation on the charge signals from the two sensors. When the human body moves within the sensor's range, this difference value changes, producing a difference signal. This difference signal is the basis for the PIR sensor to determine whether a human body is present.

4. Time Filtering

The PIR sensor also performs time filtering to avoid false triggering. When a human body enters the range, the sensor triggers an off-duty time counter. Before this counter is triggered, even if a new human body enters the range, the sensor will not trigger the alarm again.

Where is the PIR sensor used?
 
1. Security field
PIR sensors are widely used in the security field, mainly for detecting intruders. They can be used with security equipment such as alarms and surveillance cameras to improve the effectiveness of the entire security system. When a person enters the sensor's sensing range, the sensor quickly triggers an alarm, thereby preventing theft and intrusion.

2. Smart home field
PIR sensors can be used in smart home systems for lighting, air conditioning, and other functions. For example, when the sensor detects that someone is entering the room, it can automatically turn on the lights or adjust the air conditioning temperature to provide a more comfortable and convenient living environment.

3. Automation control field
In addition to the security and smart home fields, PIR sensors are also widely used in automation control. They can be used to realise functions such as human flow statistics and object movement detection. On industrial production lines, PIR sensors can detect the movement of objects, thereby achieving automated control and improving production efficiency.

As an important electronic component, PIR sensors play a role in many fields, such as security, smart homes and automatic control. Next, we will mainly discuss the application of PIR sensor LED lamps.

PIR sensor Moisture-proof  LED lamp of Topsun Lighting

1. PIR sensor LED ceiling lamp

2. PIR sensor LED wall lamp

The Features of our PIR Sensor LED lamp
 
1.  Applied to outdoor: Moisture-proof and dust-proof design.
2. Sensor direction distance: 4-10 Meters
3. Direction Angle: 120°
4. Ambient Light: >20Lux
5. Duty Time: 30-45S
6. Easy Installation: surface-mounted