Parts for Pyroelectric Infrared Motion Detector
Below are pictures of a Pyroelectric Infrared sensor and a Fresnel lens. Each of these items is sold separately so you can buy only what you need.
The sensor has a built-in FET amplifier for low output impedance. It is in a TO5 package and will operate at up to 10 volts. The FL40 lens is round and 1 inch in diameter. It is 0.015 inch thick and has a focal length of 0.4 inch. The FL65 lens has an active area 1 inch in diameter with a 1.5 inch square flange for mounting. It is 0.015 inch thick and has a focal length of 0.65 inch. The lenses are made of a plastic that passes infrared in the range of 8 to 15 microns which is most sensitive to human body radiation. These are not wide angle lenses. They have a narrow field of view of about 10 degrees. Read how infrared motion detector components work.
 |
|
 |
 |
| PIR325 Pyroelectric | FL25 Fresnel lens | FL40 Fresnel Lens | FL65 Fresnel Lens |
| Infrared Sensor | 3/4 inch diameter, 1/2 inch active area | 1 inch diameter | 1 inch diameter with flange |
| $4.00 | 0.25 inch focal length | 0.4 inch focal length | 0.65 inch focal length |
| $2.40 | $4.00 | $4.00 |
See how IR motion detector components work
See how to order for price and ordering information.
and view or print a file containing dimensions and specifications for the
Fresnel lens, PIR, enclosure and PC board
If you don't have
Acrobat Reader, download a free copy so you can view and print our PDF documents
Visit our Related and Useful links to view or print data sheets on the devices used in this project and on other discrete and integrated circuits from major semiconductor manufacturers.