ADT® Motion Sensors: What You Need to Know

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Most security system packages, including those offered by ADT, come with motion sensors. These sensors can help secure your home, but many people don't understand how they work. Here are the answers to a few of the most common questions about motion sensors.

Why Do You Need Motion Sensors?

If your home has more windows than average, motion sensors could be a great option for you. Motion detectors help secure an entire room with just one sensor, saving you money and simplifying installation by reducing the number of sensors you need to help secure your home.

How Do These Sensors Work?

ADT monitored security systems use passive infrared sensing technology, which doesn't require any emitted signals to sense movement. Instead, these sensors rely on the infrared energy given off by any heat source with temperatures above absolute zero, or -459.67 degrees Fahrenheit. Motion sensors are sensitive in the 8-12 micrometer range of infrared energy, which is the range that corresponds with the temperature of human skin, about 93 degrees Fahrenheit.

Motion sensors detect changes in infrared energy, but only if the change is rapid. For example, if someone walks past a motion sensor it will pick up the change in energy and trigger the alarm.

Heating and cooling your home won't trigger an alarm because the change in energy is too slow. Sensors also won't pick up motion outside a window because the infrared energy cannot effectively penetrate glass.

Can Pets Trigger Motion Sensors?

Many homeowners are concerned that their pets will accidently trigger motion sensors, but advances in technology have solved this problem. Modern motion sensors can detect the approximate mass of a moving object, and sensors are available with either 60 or 80 pound weight minimums needed to trigger the alarm.

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ADT Pulse Interactive Solutions Services, which help you manage your home environment and family lifestyle, requires the purchase and/or activation of an ADT alarm system with monitored burglary service and a compatible computer, cell phone or PDA with Internet and email access. These ADT Pulse Interactive Solutions Services do not cover the operation or maintenance of any household equipment/systems that are connected to the ADT Pulse Interactive Solutions Services/Equipment. All ADT Pulse Interactive Solutions Services are not available with the various levels of ADT Pulse Interactive Solutions Services. All ADT Pulse Interactive Solutions Services may not be available in all geographic areas. You may be required to pay additional charges to purchase equipment required to utilize the ADT Pulse Interactive Solutions Services features you desire.

Installation starts at $199. Burglary, Fire, Carbon Monoxide and Medical Alert monitoring requires purchase and/or activation of an ADT security system with monitored Burglary, Fire, Carbon Monoxide and Medical Alert devices. Fire, Carbon Monoxide and Medical Alert services are an additional charge. Quality Service Plan (QSP) is ADT's Extended Limited Warranty. 36-month monitoring contract required from $52.99 per month, ($1,907.64), including Quality Service Plan (QSP). Additional charges may apply in areas that require guard response service for municipal alarm verification. Prices subject to change. Prices may vary by market. Some insurance companies offer disounts on Homeowner's Insurance. Please consult your insurance company. Local permit fees may be required. Satisfactory credit history required. Additional monitoring fees required for some services. Photos are for illustrative purposes only and may not reflect the exact product/service actually provided.

$99 Customer Installation Charge. 36-Month Monitoring Agreement required at $36.99 per month ($1,331.64), 24-Month Monitoring Agreement required at $36.99 ($887.76) for California, including Quality Service Plan (QSP). Form of payment must be by credit card of electronic charge to your checking or savings account. Offer applies to homeowners only. Local permit fees may be required. Satisfactory credit history required. Certain restrictions may apply. Offer valid for new ADT Authorized Premier Provider customers only and not on purchases from ADT LLC. Other rate plans available. Cannot be combined with any other offer. Licenses: AL-17-1104, AK-35221, AZ-ROC217517, AR-2008-0014, CA-ACO6320, CT-ELC.0193944-L5, DE-07-212, FL-EC13003427, DC-602513000006, GA-LVA205395, HI-CT30946, ID-ELE-SC-39312, IL-127.001042, IN-City of Indianapolis: LAC-000156, IA-AC-0036, KY-City of Louisville: 483, LA-F1082, LA-F1914, LA-F1915, ME-LM50017382, MD-107-1626, MA-1355C, MI-3601205773, MN-TS01807, MS-15007958, MO-City of St. Louis: CC354, St. Louis County: 79853, MT-247, NE-14451, NV-68518, City of Las Vegas: 3000002944, NJ-34BF00021800, NM-353366, NY-Licensed by the N.Y.S. Dept. of State UID#12000317691, #12000286451, NC-1622-CSA, OH-53891446, City of Cincinnati: AC86, OK-1048, OR-170997, Pennsylvania Home Improvement Contractor Registration Number: PA22999, RI-3582, SC-BAC5630, SD-1025-7001-ET, TN-C1520, TX-B13734, ACR-3492, UT-6422596-6501, VT-ES-2382, VA-115120, WA-602588694/PROTEYH934RS, WV-042433, WI-City of Milwaukee: PAS-0002790, WY-LV-G-21499. 3750 Priority Way South Dr. Suite 200 Indianapolis, IN 46240 ©2014 Defender Security

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