Birds
A security system without a lot of motion detectors, or any, for that matter, would be a good choice because motion sensors are prone to going off prematurely or from the slightest movement. Almost every security system company offers systems without motion detectors.
No
That is a pretty obvious question for smoke detectors. it is so you ccant turn them off and let everyone in your home die in a horrible fire. fridges dont have them so your food and beer stays fresh and cool.
Strictly, anything that gives off light. (And strictly, with infra red detectors so readily available, anything that gives off heat, including yourself and your home.!)
The equipment and materials required to make your own motion sensor far exceeds the cost of purchasing one off the shelf.
A recent survey of convicted thieves shows that 90% of burglars are deterred by yard signs and decals from home security companies. Measures outside your home, such as cameras or motion detectors seem to be more important since many thieves won't be scared off once inside your home.
Probably yes. I have a titanium hip implant that always sets off the metal detectors at airport security. We are talking about a large implant going through and advanced detector. If you are using a basic detector and looking for a wedding ring or something small I would doubt if it would set it off. Titanium is a nonferrous metal.
Probably not.
Cops equipped with "Acceleration detectors"
The battery needs to be replaced
Airport metal detectors are quite sensitive to metals, this includes metal implants that may have been placed inside your body. Belt buckles, key chains, and steel-toed shoes may set off these sensitive metal detectors. Many commonly used orthopedic implants may also set off the metal detectors.
you can go to amazon.com or ebay.com to get flammable gas detectors and you can use swag bucks to get even more money off and get the best deals possible for your money