 
0574-8728 8325   
 
dennis@nbtstrade.com

PIR Sensor

Views:1     Author:WIKIPEDIA     Publish Time: 2019-03-10      Origin:WIKIPEIA

PIR Sensor

Typical residential/commercial PIR-based motion detector (PID).

passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

Operating principles[edit]

All objects with a temperature above absolute zero emit heat energy in the form of radiation. Usually this radiation isn't visible to the human eye because it radiates at infrared wavelengths, but it can be detected by electronic devices designed for such a purpose.

The term passive in this instance refers to the fact that PIR devices do not generate or radiate energy for detection purposes. They work entirely by detecting infrared radiation (radiant heat) emitted by or reflected from objects.



FIND US

 

E-mail
dennis@nbtstrade.com
sales@nbtstrade.com

 

Tel
0574-8728 8325

 

Address
Rm1201, 12/F., King International Bldg., No. 345 South Huancheng West Road, 315010, Haishu District, Ningbo,Zhejiang, P.R.China

QUICK LINKS

FOLLOW US

CONTACT US