how does a motion detector work

Bestseller No. 1
Guardline Wireless Driveway Alarm Outdoor Weather Resistant Motion Sensor & Detector- Best DIY Security Alert System (one Receiver + one Sensor)
  • DEPENDABLE HOME SECURITY SYSTEM: Guardline offers the most RELIABLE and ACCURATE outdoor motion detector on the market today. False alarms are minimized due to an adjustable detection width option for the sensor "eye" and a swivel mount to focus the detection angle of the sensor. Need more range? Check out our ¼ mile option.
  • SUPER EASY TO INSTALL AND CUSTOMIZE: Our wireless driveway alarm sensor is a fully expandable and feature rich plug-and-play device that sets up in minutes. Simply place your motion sensor/or multiple sensors (expandable up to 16 sensors) anywhere on your property and when a person, vehicle or large animal moves within 40 feet of the sensor’s angled eye, a signal will be sent to the receiver that will chime in your home just like a long-range doorbell.
  • RELIABLE + REALISTIC RANGE: We guarantee a 500 ft range which has been tested in real world settings with trees, buildings and walls in order to make true and realistic wireless range claims.
  • BUILT TO LAST: Outdoor sensor is made with industrial grade PVC housing, rubberized weather resistant seal, and a sunshade. Wireless sensor can be installed anywhere and runs on (4) AA batteries for up to one year. Receiver is packed with features including LOUD & adjustable volume, battery backup, and a 12-volt relay to add wired external alarms.
  • REAL PEOPLE, REAL EXPERTISE: Guardline Security has been manufacturing security products since 1999. We are local guys who are driveway alarm geeks and we're obsessed with building reliable, quality products. PEACE OF MIND extends beyond our products- we offer friendly and knowledgeable tech support that will help you both before and after your purchase.
Bestseller No. 2
Philips Hue Dusk-to-Dawn Outdoor Motion Sensor for Smart Home, Wireless & Easy to Install (Hue Hub Required, for use with Philips Hue Smart Lights)
  • ENHANCE YOUR SMART HOME EXPERIENCE: The Philips Hue Outdoor Motion Sensor detects outdoor motion and can trigger both Philips Hue Indoor and Outdoor lights. Set your Hue sensor to welcome you or guests home with lights, or detect intruders or potential package thieves with pre-set light scenes, Philips Hue Hub and Hue Smart lights required and sold separately, Works with Apple HomeKit
  • MAXIMUM SECURITY: Scare away potential package thieves or intruders, Thanks to the large view angle and detection range the outdoor sensor will spot any movement near your smart home, It can directly turn on your outdoor lights to expose intruders while turning on indoor Hue smart bulbs so it looks like you're home, even when you're not
  • EXTREME RESISTENCE: Resistant to all weather conditions, this Philips Hue outdoor sensor is designed for use in outdoor environments and has undergone rigorous tests to ensure its performance. Certified by UL, the product will withstand heavy rainfall and other weather conditions,
  • EASY INSTALLATION: Installed in a matter of minutes, the outdoor motion sensor is easy to mount and is fully wireless. You don’t need an electrician to have it installed. Just unpack the sensor, set it up through the Philips Hue app and install it wherever you like. Configuring the outdoor sensor and setting the daylight and motion sensitivity is also done via the Philips Hue app
  • LIMITLESS POSSIBILITIES: Place the Philips Hue Outdoor Motion Sensor where you want. The kit comes equipped with different mounting components. You can mount it on a flat wall, on the inner or outer corner of a wall or post, or on a pole or rain pipe. It's perfect for front yard lighting, deck lighting, porch lighting, around the door, garage or any place around your smart home where it matters. One lens to see it all: The lens of the outdoor sensor is custom designed to detect movement directly below the sensor – for example when you step out of the door or are at a longer distance it detects you. When closely examining the lens you can see how the lens pattern changes to detect movement at close range and the upper part at long range
Bestseller No. 3
Urban Security Group Wired PIR Motion Detector Alarm Motion Sensor : Pet Immune : Normally Open or Normally Close : 3 or 30 Seconds Built-In Alarm Out Timer : 9-16V DC : 40 Ft Range : 110° H & 60° V
  • Urban Security Group Wired Motion Detector Alarm Motion Sensor With Pet Immunity Up To 12KG Pet Size
  • NO or NC Relay Adjustable ::::: Normally Open or Normally Close (Set via Jumper)
  • 3 Seconds or 30 Seconds Built-In Alarm Out Timer (Set via Jumper)
  • 9-16V DC ::::: 40 Ft Range ::::: 110° H & 60° V ::::: Status LED Light ON or OFF (Set via Jumper)
  • Pulse + Sensitivity Adjustable (Set via Jumper) ***** IF UNSURE ABOUT CONNECTIONS, PLEASE CONTACT PROFESSIONAL ALARM OR ELECTRICAL COMPANY ON HOW TO WIRE THIS MOTION SENSOR INTO YOUR EXISTING SYSTEM!
SaleBestseller No. 4
Ring Video Doorbell (1st Gen) – 720p HD video, motion activated alerts, easy installation – Satin Nickel
  • 720p HD video doorbell that lets you see, hear and speak to people from your phone, tablet, or select Echo device.
  • Get notifications whenever motion is detected by adjusting your motion zones.
  • With Live View, you can check in on your home any time through the Ring app.
  • Easily setup your Ring Video Doorbell by connecting to wifi via the Ring app and mounting in your desired location.
  • Powered by a built-in rechargeable battery or connects to existing doorbell wiring. With a Ring Protect Plan (subscription sold separately), record all your videos, review what you missed for up to 60 days, and share videos and photos.
SaleBestseller No. 5
SMART CAREGIVER TL-5102MP Motion Sensor And Pager
  • Allows caregiver freedom to monitor movement remotely
  • Removes alarm noise from bedside
  • Optional adjustable mounting bracket
  • 1 Caregiver Pager (Batteries Sold Separately) 1 Motion Sensor (Batteries Sold Separately)
SaleBestseller No. 6
Directed Install essentials Dual Zone Motion Sensor 508d
  • Invisi beam Field Disturbance Sensor
  • Generates two invisible detection fields around your vehicle
  • Offers either a Warn Away response or full alarm
  • Great for convertibles, trucks or any car
  • Detects moving high-density objects using RF field-disturbance technology
Bestseller No. 7
WJLING Motion Sensor Alarm, Wireless Driveway Monitor Alarm, Home Security Business Detect Alert with 3 Sensor and 2 Receiver, 38 Chime Tunes - LED Indicators
  • 【Wireless, Easy and Fast Installation】: This monitor system is fully-expandable, with plug-and-play sensors that can be set up within minutes. The sensors can be mounted to walls, fence posts, trees, or any other surface, which is great for homes, offices, garages, yard and shopping malls.
  • 【3 Alert Options & 38 Chimes to Choose From】: You can select 1 of 3 ways of being alerted (Sound/LED Flash/Sound and LED Flash) and 3 volume levels from 25-80dB. You can also select from 38 Ringtones with Bright LED Light.
  • 【Wireless Plug-in Receiver】: The portable wireless plug-in receiver plugs into any standard outlet. The sensor uses 3 AAA batteries (Not Included). Infrared sensor detects motion and sends a signal to the receiver. Detection time delay in between motion sensor detector alerts is configurable from 15 seconds to 30 seconds, just place the sensor at the entrance to your driveway and the receiver inside your home.
  • 【Support Long Distance Connection】: Working range up to 328 feet (100 meters) between receiver and transmitter allowing you to place it a good distance. It can be alerted to visitors, notice door opening, scare off unwanted intruders, or even know when your children have accessed restricted areas.
  • 【Applicable places】: Ideal for front doors, hallway, window frames, driveways, walking paths, and anywhere in your home you want to be alerted to motion. Also great to alert business owners that are working in the back, or out of sight, to customers entering their store.Please note that this not waterproof. Keep it away from rains or cover adequately.
Bestseller No. 8
Heath Zenith SL-5407-BZ 180-Degree Replacement Motion Sensor, Selectable Timer, Adjustable Motion Detection Sensitiity Upto 70Feet Range, LED Indicates Motion Sensed (Day or Night), 500W, Bronze
  • Detection Range: Adjustable up to 70 ft. (21m), varies with surrounding temperature
  • Sensing Angle: Up to 180-Degree
  • Electrical Load: Up to 500 Watt (4.2A) Maximum Incandescent, up to 250 Watt maximum each lamp holder
  • Power Requirements: 120 VAC, 60 Hz
  • Operations: TEST, AUTO and MANUAL Mode, 1, 5, 10 Minutes Time Delay
Bestseller No. 9
Dog Barking Alarm Motion Detector,Pir Wireless Human Body Walking Sensor Doorbell Door Security Alert System Device for Home or Office Burglar Deterrent (1Sensor + 1Receiver, White)
  • 8 Doorbell Ring Chimes (Less is More): Three Dog Barking sounds;1x Generally Alarm; 1x Welcome;1x Ding Dong;2x Melody; 4 Volume level (The maximum volume can reach to 110db); The special dog barking sound can be use as a alarm to let you know when somebody or the animals get through, it could be a tool to scare away the thieves in some circumstances, but this is just a tool and it cannot equal a real dog
  • Working Range: 1000Ft at open area with open antenna and it’s suitable for 0~200 m² to use; With waterproof building, It’s suitable for indoor/outdoor use; double-sided sticker or screw can be used
  • 3 Working Modes: LED Flashing Light; Sounds; Sounds+LED Flashing Light; Choose the one you like
  • Multiple Possibilities: Components are factory paired for your convenience, so you can choose N Sensors + N Receivers for your extra needs
  • Buy with Confidence: 1 year warranty and friendly customer service!
Bestseller No. 10
DrawGreen DG08-A Solar Outdoor Motion Sensor,1400-Lumens Bright LED Spotlight 5W(110W Equiv.) Light, White
  • 【Patent Solar Lights Much Brighter and Away Range】- 1400LM 9-Watts(110W Equiv.) LED outdoor solar flood security light with optics-grade PMMA lens makes it much brighter,Strong light up to 40-55 feet. On sunny days only takes about 5-6 hours to fully charge. Low-light lighting on rainy days without sunlight can last for 3 days. Superior to most solar motion sensor light on the market.
  • 【Quality Aluminum alloy Solid Durable and More Safely】- High-strength Aluminum alloy shell. Compared with ABS plastic, Aluminum alloy shell is more durable and can be used for 3-5 years. Metal bracket can be removed, easy to carry. Solar lights using Constant Current&Steady Voltage circuit board, Charge&Discharge protect IC and Replaceable 18650 Li-ion battery design, safer than similar products. Waterproof Protection IP66. Freezeproof/Heatproof from -30 to 120℉. Ready for all terrible weather.
  • 【Dusk to Dawn Flood&Security light】For the sake of energy saving, Solar Lights outdoor has built-in photocell sensor, it will turn off during the daytime and it will turn on under Dim-light mode at night automatically. With an astonishing lifespan of 50,000 hours and 160-Weeks Warranty, no more frequent replacing and maintenance.We provide 100% replacement warranty if there is any quality issue or any reason that caused you dissatisfy with this item.
  • 【Motion Sensor Light】- Build-in PIR motion detection sensor, this solar lights can detect up to 20-26ft. away and range 120 degree, turn on high-bright lighting mode(1400LM) for 20s distance up to 40-55ft. after the motion detected then turn to DIM mode. Perfect for garden yard lawn patio garage porch driveway landscape security. Make our life more convenient.
  • 【Rotated 360° angle Infrared Motion Sensor and Lighting 】- Solar lights holder can be rotated 360°, and the solar panel is also with adjusted angles, so you can get full range of lighting and sensing angle. Black high sensitivity infrared sensor. The metal bracket can removed by screw metal ring and use it as a flashlight and easy to carry.

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