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Question:

Why is our smoke detector going off at night?

Why is our smoke detector going off at night?

Answer:

There are a ton of security camera options, depending on budget and preference. Swann makes one that comes with a 60' RCA cable to hook to your television (PNP-50 Compact Indoor Security Camera). Lorex and Swann also make wireless cameras, and those you can view from your computer or smart phone - some even have the option (within the computer software) to send notification when the camera detects movement - ie, someone at the door. Hope that helps! Double Agent Lindsey S. Badge 49398 Double Agent - Home Theater Geek Squad Social Media Team 01/06/2014
Only if you have really big binoculars with special glass in them. The cheap motion detectors have an array of infrared sensitive sensors which are mounted so each one looks at a small area out in front of the detector - like 3-4 high and 8-12 wide. The electronics looks at the signals and detects on the basis of two things - a difference between two detectors side by side and movement from one detector to another. So to make it work at a distance you would need an eyepiece as big as the front of the detector. Long distance detectors are normally a form of video camera with special glass lenses and scanning circuitry on a small finely divided sensor. Because of doing differences cheap motion detectors can't detect if the outdoor temp is the same as a person's skin temp or if a bundled up winter coat has an outside temp as cold as the background.

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