\$\endgroup\$ – tomnexus Aug 21 '15 at 9:26 \$\begingroup\$ How about radar? A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. You want to make sure that you are not just … While our lenses are mostly used for security and lighting applications they have numerous other area sensing applications for products such as fan control, door activation, temperature measurement and They are most often used in PIR-based motion detectors.PIR sensors are commonly used in security alarms and automatic lighting applications. The lens of a camera, or the lens of a PIR, is the window. I changed them out today and the instructions were fair but not as good as they should be. I went ahead and made a drawing of the PIR lens showing the top and bottom better versus the wording in the instructions. Latest Stories. The topic ‘Help: PIR spares and repair – curved lens or whole sensor’ is closed to new replies. Christmas Countdown Day 24 – Thomson Bar & Stem; Dome size PIR Sensor lens cover is primarily used to transmit infrared light for motion sensor and motion detector use. The camera still functions, but I need to replace to PIR lens to prevent the potential for moisture to get into the camera. Small leaves or twigs should not produce many false triggers based on how the camera operates. Passive Infrared PIR Fresnel lens is made of … Anyone know of any problems with that fix? The lens, the PIR sensor, and the light meter are the most fragile aspects of your camera. I got the PIR lenses yesterday (Saturday). Issue 134. They're different at different wavelengths, but you still need a way for the radiation to pass through the wall of the box. PIR Lens “Dome” As you can see in the pictures above, the PIR has some funny dome-like bubble, which is a collection of lenses covering the sensor. While they are built sturdy, forcing plastic to break open can result in broken hinges, creating a bigger problem than you started with. If you look closer, you’ll see that the “dome” is build out of little segments – each being a small plastic Fresnel Lens. What can I use to replace the lens… Infrared Optics Polymer Optics Ltd is a leading supplier of Passive Infra-Red (PIR) lenses and PIR lens design services to the security and lighting control industries. I have 2 Pro 2 cameras (That still work) and both have the PIR lens destroyed by a woodpecker. Fixed the broken LED glass with a quick Plexiglass cut. Seems to be working fine in my other camera. PIR sensors work best when there is a good difference in temperature between the animal and the outside temperature. I have emailed Moultrie numerous times, but have gotten no responce. 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