Motion Sensor Door
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 Wireless Driveway Patrol Alarm Motion Sensor Detector Security System Door Patio $7.51 (5 Bids) Time Remaining: 14h 38m |
 Visitor Door Bell Chime Motion Sensor Wireless Alarm $6.75 Time Remaining: 23d 10h 21m Buy It Now for only: $6.75 |
 Chime Welcome Door Bell Motion Sensor Wireless Alarm $6.79 Time Remaining: 1d 18h 4m Buy It Now for only: $6.79 |
 Wireless Driveway Patrol Alarm Motion Sensor Detector Security System Door Patio $16.95 Time Remaining: 16d 9h 2m Buy It Now for only: $16.95 |
 MOTION SENSOR PIR ALARM DOOR SHED GARAGE CARAVAN HOME $7.74 Time Remaining: 2d 3h 30m Buy It Now for only: $7.74 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 15d 8h 29m Buy It Now for only: $1.00 |
 VOICE ALERT SYSTEM 6 WIRELESS MOTION ALARM + 6 SENSORS DRIVEWAY BACKYARD DOOR $358.50 Time Remaining: 27d 13h 34m Buy It Now for only: $358.50 |
 16 Chime Welcome Door Bell Motion Sensor Wireless Alarm $4.79 Time Remaining: 12d 22h 39m Buy It Now for only: $4.79 |
 Entrance Entry Door Bell Motion Sensor Activate Chime $11.99 Time Remaining: 23d 22h 51m Buy It Now for only: $11.99 |
 2 Pack Megabrite Wireless Motion Sensor Door Entry Light 10 Led Home Security $31.00 Time Remaining: 11d 19h 4m Buy It Now for only: $31.00 |
 Wireless Driveway Patrol Alarm Motion Sensor Detector Security System Door Patio $5.24 (5 Bids) Time Remaining: 2d 14h 38m |
 Motion Sensor Detector Welcome Chime Door Announce $6.80 Time Remaining: 14d 9h 25m Buy It Now for only: $6.80 |
 PIR ALARM DOOR SHED GARAGE CARAVAN CORDLESS INFRA RED MOTION SENSOR INTRUDER $9.30 Time Remaining: 12d 7h 31m Buy It Now for only: $9.30 |
 WIRELESS MOTION SENSOR DETECTOR ENTRY DOOR BELL CHIME $29.99 Time Remaining: 10d 23h 27m Buy It Now for only: $29.99 |
 WIRELESS MOTION SENSOR DETECTOR ALARM DOOR ENTRY SYSTEM PATHWAY EMERGENCY SAFETY $58.00 Time Remaining: 19d 21h 17m Buy It Now for only: $58.00 |
 Wired Curtain Detector Motion Sensor Alarm For Home Security System Window Door $6.99 Time Remaining: 16d 18h 35m Buy It Now for only: $6.99 |
 HOME DOOR WINDOWS SECURITY ALARM MOTION SENSOR DETECTOR $6.99 Time Remaining: 10d 5h 43m Buy It Now for only: $6.99 |
 WIRELESS MOTION SENSOR DETECTOR ENTRY DOOR BELL CHIME $27.00 Time Remaining: 12d 16h 29m Buy It Now for only: $27.00 |
 New 6m Curtain Detector Motion Sensor Alarm For Home Security System Window Door $6.99 Time Remaining: 1d 19h Buy It Now for only: $6.99 |
 Entry Alert Door Chime Visitor Detector Customer Entrance Alarm Motion Sensor $9.99 Time Remaining: 2d 19h 29m |
 WIRELESS ALERT MONITOR DOOR DRIVEWAY MOTION SECURITY ALARM CHIME DETECTOR SENSOR $39.99 Time Remaining: 10d 20h 55m Buy It Now for only: $39.99 |
 A3 DIGITAL PIR MOTION SENSOR ALARM DOOR BELL CHIME $19.29 Time Remaining: 28d 8h 13m Buy It Now for only: $19.29 |
 2Annunciator Infrared Led Motion Sensor Door Alarm $4.99 Time Remaining: 29d 3h 56m Buy It Now for only: $4.99 |
 Home Security Welcome Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 13d 8h 5m Buy It Now for only: $1.00 |
 PIR motion sensor window door alarm detector system $13.20 Time Remaining: 28d 19h 10m Buy It Now for only: $13.20 |
 WIRELESS Motion Sensor DOCTOR OFFICE MEDICAL PRACTICE ALARM ALERT Door Chime Bel $29.99 Time Remaining: 16d 8h 45m Buy It Now for only: $29.99 |
 2 in 1 WIRELESS MOTION SENSOR DETECTOR DOOR BELL CHIME $41.53 Time Remaining: 11d 1h 14m Buy It Now for only: $41.53 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $6.28 Time Remaining: 17h 11m Buy It Now for only: $6.28 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 24d 8h 58m Buy It Now for only: $1.00 |
 Wireless Driveway Patrol Alarm Motion Sensor Detector Security System Door Patio $10.99 Time Remaining: 4d 12h 39m |
 VOICE ALERT SYSTEM 6 WIRELESS MOTION ALARM + 3 SENSORS DRIVEWAY BACKYARD DOOR $238.50 Time Remaining: 16d 15h 53m Buy It Now for only: $238.50 |
 WIRELESS MOTION SENSOR DETECTOR ENTRY DOOR BELL CHIME $39.99 Time Remaining: 13d 18m Buy It Now for only: $39.99 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 19d 19h 27m Buy It Now for only: $1.00 |
 Entry Alert Door Chime Visitor Detector Customer Entrance Alarm Motion Sensor $16.83 Time Remaining: 8d 19h 48m Buy It Now for only: $16.83 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 19d 13h 25m Buy It Now for only: $1.00 |
 Wireless Alarm System Door Window Protection with Motion Sensor NEW QUICK SHIP $17.95 Time Remaining: 25d 13h 17m Buy It Now for only: $17.95 |
 Home Security Welcome Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 23d 8h 7m Buy It Now for only: $1.00 |
 External Home Motion Sensor 105dB Alarm With 2 Remote Control Door $9.98 Time Remaining: 9d 18h 8m Buy It Now for only: $9.98 |
 Wireless Driveway Patrol Alarm Motion Sensor Detector Security System Door Patio $6.50 (5 Bids) Time Remaining: 4d 14h 39m |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $5.49 Time Remaining: 29d 14h 10m Buy It Now for only: $5.49 |
 VOICE ALERT SYSTEM 6 WIRELESS MOTION ALARM with 1 SENSOR DRIVEWAY BACKYARD DOOR $134.50 Time Remaining: 21d 14h 52m Buy It Now for only: $134.50 |
 TWO MOTION SENSOR DETECTOR ENTRY DOOR ALARM SYSTEM $59.99 Time Remaining: 25d 22h 26m Buy It Now for only: $59.99 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 22d 8h 26m Buy It Now for only: $1.00 |
 A3 DIGITAL PIR MOTION SENSOR ALARM DOOR BELL CHIME $19.29 Time Remaining: 28d 5h 54m Buy It Now for only: $19.29 |
 WIRELESS MOTION SENSOR DETECTOR ALARM DOOR ENTRY SYSTEM PATHWAY EMERGENCY SAFETY $21.00 Time Remaining: 21d 15h 30m Buy It Now for only: $21.00 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $5.19 Time Remaining: 8d 14h 3m Buy It Now for only: $5.19 |
 HOME DOOR WINDOWS SECURITY ALARM MOTION SENSOR DETECTOR $13.99 Time Remaining: 18d 12h 24m Buy It Now for only: $13.99 |
 Entry Alert Door Chime Visitor Detector Customer Entrance Alarm Motion Sensor $9.99 Time Remaining: 5d 19h 29m |
 Entrance Entry Door Bell Motion Sensor Activate Chime $15.99 Time Remaining: 13d 20h 28m Buy It Now for only: $15.99 |
 2Annunciator Infrared Led Motion Sensor Door Alarm $4.99 Time Remaining: 13d 23h 53m Buy It Now for only: $4.99 |
 VOICE ALERT SYSTEM 6 WIRELESS MOTION ALARM PIR SENSOR DRIVEWAY BACKYARD DOOR $58.00 Time Remaining: 26d 12h 19m Buy It Now for only: $58.00 |
 8 LED Light Lamp PIR Auto Sensor Motion Detector Door $1.00 Time Remaining: 28d 15h 37m Buy It Now for only: $1.00 |
 3x Auto Motion Detector Roof Door Garage PIR Sensor LED Light Black White $24.89 Time Remaining: 8d 20h 32m Buy It Now for only: $24.89 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 4d 8h 34m Buy It Now for only: $1.00 |
 2x Wireless Home Window Door Security Device Alarm System Burglar Motion Sensor $2.39 Time Remaining: 24d 18h 4m Buy It Now for only: $2.39 |
 Home Security Welcome Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 14d 13h 44m Buy It Now for only: $1.00 |
 8 LED Light Lamp PIR Auto Sensor Motion Detector Door $1.00 Time Remaining: 13d 18h 5m Buy It Now for only: $1.00 |
 LOT OF 2 SMITHWESSON DOOR ALARMS W SENSOR N 1 MOTION DETECTOR W PRGMBL KEYPADS $29.99 Time Remaining: 1d 20h 32m |
 8 LED Light Lamp PIR Auto Sensor Motion Detector Door $1.00 Time Remaining: 3d 18h 51m Buy It Now for only: $1.00 |
 Megabrite Light Wireless Motion Security Sensor Door Entry 8 Led 100 Authentic $26.50 Time Remaining: 7d 20h 15m Buy It Now for only: $26.50 |
 Home Security Welcome Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 11d 14h 45m Buy It Now for only: $1.00 |
 2 Pack Wireless Motion Sensor Outdoors Front Door Security 10 LED Lights NEW $37.12 Time Remaining: 4h 27m Buy It Now for only: $37.12 |
 Megabrite Wireless Motion Sensor Door Entry Light 8 Led $19.75 Time Remaining: 16d 3h 58m Buy It Now for only: $19.75 |
 8 LED Light Lamp PIR Auto Sensor Motion Detector Door $1.00 Time Remaining: 13d 15h 37m Buy It Now for only: $1.00 |
 External Home Motion Sensor 105dB Alarm With 2 Remote Control Door $19.99 Time Remaining: 7d 28m Buy It Now for only: $19.99 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 22d 8h 13m Buy It Now for only: $1.00 |
 Motion Sensor Detector Front Door Entry LED Light NEW $14.95 Time Remaining: 4d 16h 32m |
 Motion Sensor Detector Welcome Chime Door Announce $7.18 Time Remaining: 8d 10h 43m Buy It Now for only: $7.18 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 18d 14h 4m Buy It Now for only: $1.00 |
 Home Security Welcome Door Bell Motion Sensor Wireless Alarm $1.00 Time Remaining: 14d 13h 33m Buy It Now for only: $1.00 |
 3x Auto Motion Detector Roof Door Garage PIR Sensor LED Light White White $26.89 Time Remaining: 13d 21h 36m Buy It Now for only: $26.89 |
 Wireless Motion Sensor Doorbell Door Bell Ring $9.79 Time Remaining: 6d 11h 39m Buy It Now for only: $9.79 |
 English Hello Welcome Speak Motion Sensor Door Announce $6.80 Time Remaining: 16d 18h 42m Buy It Now for only: $6.80 |
 Door Entry Burglar Motion Detector Sensor Alarm Home Safety Security Cordless $21.99 Time Remaining: 13d 19h 46m Buy It Now for only: $21.99 |
 Welcome Chime Door Bell Motion Sensor Wireless Alarm $5.49 Time Remaining: 24d 15h 12m Buy It Now for only: $5.49 |
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Infrared Sensor
Sensors are everywhere, some examples:
- Smaller shops or barbershops, often have a beam of light crossing the room near the door, which ends up in a photo-sensor on the other side of the room. When a customer breaks that beam, the bell rings.
- Bigger markets have automated doors, the black bulb above the door sends a burst of microwave radio energy, and waits for the reflected energy to bounce back. When a person walks into that field, the amount of energy is changed,...resulting in the door to open. Therefor you can't just run in a market, the doors wont open fast enough
. So no kidz, it doesn't have a little leprecon in it, which presses a button to open the doors!! - Same thing with ultrasonic sound waves used by bats for example, they bounce back off a target and create an image.
These are what we call active sensors. They send out energy, and detect changes in them .
Motion Sensor
The motion sensing system is a passive sensor. It detects infrared energy. Human beings have a skin temperature of approximately 36° Celsius or 93° Fahrenheit, this produces an infrared energy with a wavelength between 9 and 10 micrometers. When infrared energy is detected, that infrared light bumps electrons of the sensors substrate, these are amplified and result in a signal.
People who have these little sensors, may notice that the sensing light doesn't go off when you're standing still. That's because the sensor is programmed to sense rapidly changes, you don't want every change of infrared light setting off the alarm .
If you're searching for a hack in this system, ...than this is your lucky day, because you can. The sensors are sensitive in a range of 8 - 12 micrometers. So all you need to do is calculate what body temperature you got to have to produce waves of 7 micrometers or less. I'm not responsible if you got hypothermia afterwards . Or maybe you could build a glass bulb around you, glass doesn't let the infrared waves through, think of a greenhouse, the light goes in , but then it's trapped inside... so beware of people passing by in the possession of glass bulbs...
Footnote: During Operation: Desert Storm. The US military used infrared vision equipped tanks to spot and fight hostile tanks at night. Result: hostile tanks getting slaughtered like a sitting duck, technology = win
About the Author
I'm Jan Vansteenlandt, i'm 19 years old, i still attend school.
My articles will be around the technology topic, and all it's subcategories. Normally IT-related.
I hope you enjoy them 
April 2nd, 2010 in
Home Security | tags: alarm, door, lighting, motion sensor door alarm, motion sensor door chime, motion sensor door opener, motion sensor doorbell, motion sensor doors, sensor