Most pet motion detectors use a dual lens feature, which gives the device the ability to distinguish humans from all household pets under 2 1/2 feet and up to 85 lbs (depending on the model and sensitivity adjustments). A model with these specifications will not sound an alarm if one of your pets (small dogs, cats) walks into the coverage area. But, if you have an active cat, it might jump up into the area being covered and set off the alarm. Also, if you have more than one pet, it would be a good idea to keep each pet separated from each other while the system is armed. Two or three pets in front of the same motion sensor at the same time may confuse the sensor, and cause an alarm. In these situations, the glass break detector that can sense high frequency sounds in combination with some strategically placed door and window contacts will do the job. And because the glass break detector will not go off unless a certain sound of breaking glass occurs, it can be left on 7/24. For more information call Interstate Alarm Monitoring at 1-877-717-7477 or go to www.interstatealarmmonitoring.com .
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