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They are usually connected to a fire alarm that sets off an audible warning when triggered, or to the automatic sprinkler system if you happen to have one installed in your house. In countless instances, smoke detectors have given ample time for home or office occupants to escape before the fires could do greater damage. They have certainly saved lives. Having a smoke detector warns a house occupant early on that something is burning and needs to be put out. Now, the saving part depends on whether or not you have the tools and equipment to put the fire out or whether your fire department is quick to respond to such an alarm. You also have to be alert enough to either try to put out the fire yourself or call the fire department immediately. Smoke detectors are made with different kinds of sensors that detect excessive smoke when it is present and gives out the alarm, or triggers the automatic fire control system. It is best that homeowners are able to see the difference among these different types and see how they work, before deciding on which ones to buy and install in the house. The type of sensor installed in a smoke detector may also dictate the price range, since there are sensors that have more expensive components than those of the other types. Among the types of sensors presently used by several manufacturers of smoke detectors are the ionization type, the optic sensor – also called photo electric sensor, the air sampling sensor, and combination type sensors. A smoke detector with an ionization type sensor uses what is called radio isotopes that produce ionization in the air.

Posted March, 2011 by Admin

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Flood Sensor

You can sign up to Honeywell Smarthome Security here Other home security systems to considerBrinks works with a wider variety of smart home devices than most other companies, plus it offers both DIY and professional installation options as required. You can buy into Brinks Home Complete, or purchase the Nest Security System see above at a discount through Brinks. The service is really focused on providing the monitoring for you, which comes in relatively cheap in industry terms at $29 per month, after hardware costs. The one caveat is to expect to sign a three year contract, with early exit penalties coming into play 30 days after purchase. ADT is an established security company that offers equipment tied to a subscription based monitoring service, most of which will require professional installation that the company can provide. Like Brinks, ADT pushes for a three year initial contract, which afterwards is renewed monthly, but unlike all the other firms listed it's not very transparent about pricing.

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, visible and infrared light to enter the lens assembly 704.

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Posted February, 2011 by Admin

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