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Combination Type Detectors It use both ionization and optical sensors, as mandated by some states. Ionization detectors tend to react slower, and may not warn people inside the house or commercial buildings adequately enough to be able to make it to the exit. So fire departments and legislative bodies recommended installing photo electric smoke detectors, or combination type detectors. The other feature that one may consider in a smoke detector is its gas detection capability. Incorporated in many of the newer models are carbon monoxide and carbon dioxide sensors that trigger an alarm when there is a high level of these gases present in the air. As stand alone detectors, they may be useful as alarms against dangerous gases, but may not be able to detect smoke out of ordinary fires early enough.alarm systems home security
5 percent occurring on residential properties. These crimes were expensive, costing the average victim over $2,300 or an estimated $3. 6 billion in property losses. With those statistics in mind, home security cameras are a crime deterrent. When criminals scope out a home to burglarize or invade, the very presence of a security camera can discourage intruders from trying to break in. Even still, the more determined and experienced burglars can disarm or block visible security cameras, so the installation of both visible and hidden security cameras can strengthen the security of a home.