affordable home security

Like most devices, the store or company should allow a return policy and issue warranty when buying smoke detectors. Limited warranties range from 2 10 years and return policies are permissible up to 90 days. Smoke detectors must indicate that it has met Underwriters Laboratories UL Standard 217 and carbon dioxide detectors must meet UL Standard 2034. UL conducts certification training on every electrical appliance. Smoke detectors can only alert you if there’s fire. The rest depends on the homeowner’s preparation and other fire prevention safety measures. Equip yourself with fire extinguishers and sprinklers, too, if necessary. Photo Electric or Optical Sensors They are triggered by smoke disturbing an existing beam of light inside the detector. When smoke is not present, the beam from a light source inside the device travels in a straight line to a detector, but when smoke particles enter, some of the light is scattered and triggers the electrical circuit that sounds the alarm. Air Sampling Detectors These have sensors that are capable of detecting microscopic smoke particles in the air. They actually draw air into the detector and passes it into minute pipes that lead to a laser optical device that has the capability to detect minute particles of combustion.

Posted March, 2011 by Admin

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mobile alert systems

In a particularly handy feature, there's a button you can press on the Nest Detect that disarms the sensor so you can open the door without bothering everyone in the house with an alarm; the sensor rearms when the door is shut. Nest DetectThe final piece of the puzzle is Nest Tag, which attaches to your keyring. It allows you to tag in and out of the house for those times you don't want to fiddle with the keypad on the Nest Guard. Nest executives stress that the 1. 46 inch circular Nest Tag is pretty durable, capable of surviving a trip through the washing machine if you forget to remove it from your pocket. In addition to the keypad on the Nest Guard and the Nest Tag, there's a third way to arm and disarm the system — an app on your phone.

wireless security home system

You can easily access them anytime, anywhere by signing into your account on your mobile device or using a mobile app.

That means that it can differentiate between an intruder, your dog, and your family.

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Posted February, 2011 by Admin

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