PIR325 Datasheet | Glolab Corporation

.. INFRARED PARTS MANUAL PIR325 FL65 GLOLAB CORPORATION .. Thank you for buying our Pyroelectric Infrared ponents. The goal of Glolab is to produce top quality electronic kits, products and ponents. All of our kits are designed by Glolab engineers and tested in our laboratory. Mechanical devices, prototypes and enclosures are fabricated in our precision machine shop. Glolab Corporation has two locations in New York’s Hudson Valley. Our electronics laboratory and kit packaging is located in Wappingers Falls and our machine shop is in Lagrangeville. In addition to our kits, we supply some special and hard to find parts such as our Pyroelectric Infrared Sensor, Infrared Fresnel lens and machined enclosure for mounting our Fresnel lens. for those of you who want to design and build your own projects. Technical help is available by email from lab@glolab.. Copyright © 2003 Glolab Corporation 307 Pine Ridge Drive Wappingers Falls, NY 12590 .. Infrared Radiation_____________ Infrared radiation exists in the electromagnetic spectrum at a wavelength that is longer than visible light. Infrared radiation cannot be seen but it can be detected. Objects that generate heat also generate infrared radiation and those objects include animals and the human body whose radiation is strongest at a wavelength of 9.4µm. Pyroelectric Sensors_____________ The pyroelectric sensor is made of a crystalline material that generates a surface electric charge when exposed to heat in the form of infrared radiation. When the amount of radiation striking the crystal changes, the amount of charge also changes and can then be measured with a sensitive FET device built into the sensor. The sensor elements are sensitive to radiation over a wide range so a filter window is added to the TO5 package to limit ining radiation to the 8 to 14µm range which is most sensitive to human body radiation. Figure 1 shows how typically, the FET...