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.
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| PIR325 Pyroelectric | FL40 Fresnel Lens | FL65 Fresnel Lens |
| Infrared Sensor | 1 inch diameter | 1 inch diameter with flange |
| $4.00 | 0.4 inch focal length | 0.65 inch focal length |
| $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
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