Ludlum model 101 Geiger counter Gamma-Scout Geiger Counter/Dosimeter Both great instruments. Used some vintage fiestaware as test sources Film shot using a Canon PowerShot SX40 HS
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www.offsitecommander.com Add an infrared motion detector. A Passive InfraRed sensor (PIR sensor) is an electronic gadget that quantifies infrared (IR) light radiating from physical objects in its field of sight. PIR detectors are often utilised in the making of PIR-based motion detectors. Apparent motion is determined when an infrared source with one temperature, such as a human, goes in front of an infrared source with another temperature, such as a wall. All objects above absolute zero give off energy and is in reference to what's recognized as black body radiation. It's normally infrared radiation that is concealed to the naked eye but can be sensed by electronic devices made for such an intent. The term passive in this case signifies that the PIR gadget doesn't give off an infrared beam but merely passively receives incoming infrared radiation. "Infra" meaning below our ability to detect it visually, and "Red" because this color stands for the lowest energy level that our eyes can see before it turns invisible. Thus, infrared means below the energy degree of the color red, and applies to many sources of invisible energy. The motion sensor can be linked to the webcam in such a mode as to act several purposes. If an individual or a vehicle goes near the fortified area, the movement can make a light to illuminate the area, discouraging vandalism or thievery. Recording can automatically start on a distant computer on the Internet, so that any action will be caught for ...
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