Electronic Pet Doors
Several types of pet doors that allow selective access are available. The advantages of this type of pet door over simpler models are improved weather resistance, and home security against strays and other unwanted animals. Some use a permanent magnet mounted on the pet's collar to activate a matching electromagnetic mechanism that unlatches the door panel when the magnet comes within range; several pets can be fitted with collars that match the same door. Pet doors with infrared locks open only when a collar-mounted device transmits the correct code to the latch's receiver, allowing owners to have multiple flaps that different pets can use, e.g. a small cat flap to the back yard and a large dog door accessing a dog run. Either type can be used to selectively allow one pet outside access, while denying it to one that does not have the necessary equipment (e.g., an ill animal that needs to stay indoors).
Some of the newest models use radio-frequency identification to electronically read a pet's microchip implant rather than the pet having to wear a collar that triggers the mechanism.
Read more about this topic: Dog Door
Famous quotes containing the words electronic, pet and/or doors:
“Sometimes, because of its immediacy, television produces a kind of electronic parable. Berlin, for instance, on the day the Wall was opened. Rostropovich was playing his cello by the Wall that no longer cast a shadow, and a million East Berliners were thronging to the West to shop with an allowance given them by West German banks! At that moment the whole world saw how materialism had lost its awesome historic power and become a shopping list.”
—John Berger (b. 1926)
“Belinda lived in a little white house,
With a little black kitten and a little gray mouse,
And a little yellow dog and a little red wagon,
And a realio, trulio, little pet dragon.”
—Ogden Nash (1902–1971)
“Some hours seem not to be occasion for any deed, but for resolves to draw breath in. We do not directly go about the execution of the purpose that thrills us, but shut our doors behind us and ramble with prepared mind, as if the half were already done. Our resolution is taking root or hold on the earth then, as seeds first send a shoot downward which is fed by their own albumen, ere they send one upward to the light.”
—Henry David Thoreau (1817–1862)