Alarm Motion Detector Tutorial

By: Ari Erenthal, Published on Mar 06, 2017

Sensors designed to detect movement are a good way to protect large, open areas. In this tutorial, we examine motion detectors, including:

  • Passive infrared (PIR) detection
  • Microwave detection
  • Dual technology detectors
  • Movement profiles
  • Detection patterns
  • Look down protection
  • Pet immunity
  • False alarm prevention - the 9 key factors that increase false alarms
  • Motion detector selection guide - living room, living room with door, kitchen, commercial kitchen, skylight

******* ******** ** ****** movement *** * **** way ** ******* *****, open *****. ** **** tutorial, ** ******* ****** detectors, *********:

  • ******* ******** (***) *********
  • ********* *********
  • **** ********** *********
  • ******** ********
  • ********* ********
  • **** **** **********
  • *** ********
  • ***** ***** ********** - the * *** ******* that ******** ***** ******
  • ****** ******** ********* ***** - ****** ****, ****** room **** ****, *******, commercial *******, ********

[***************]

********

**** ********* ** ***** system, ********** ****** *** layers ** ********** ** detect *********. *** *******, contacts ** ********* **** detect ***** ** ******* opening *** *******. ** is **** ********, *******, to **** * ****** layer ** ********** ** case ** ******** ******** or ******** ***** ********. With ****** ********* ********** the ******** ****** *** contacts ********** *** ********, it ** **** ****** that ** ******** **** be **** ** **** entry **********. ******** *** motion ********* ********** **** other, ****** **** ********* each *****. ***** **** one ** *** ***** means **** * ************ burglar *** ** **** to ****** *** ***** system. 

Passive ******** ********* (***) *********

*** ****** **** ******** radiation ** *** **** of ****. ****** ********* use ************* ******, ***** ****** *****, ** ****** **** heat. *** **** ***** motion ********* *** * pyro ***** ** ****. As ** ****** ***** in ***** ** *** half ** *** ****, the ****** ** ******* infrared ********* **** ********, causing *** ******* ** one **** ** ***** high ******** ** *** other ****. ** *** object ********* ** **** in ***** ** *** other **** ** *** pyro, *** ******** ********* reading will ****** *****, ******* the ****** **** ** swing ****** **** *** first. ****** ********* *** this ********** ** **** a ****** ** *** alarm *****. 

*** ***** **** ******* two *********** ********* ***** looking ******** *****. ****** detectors *** * **** made ** **** ******* to ***** ***** ********* zones *******, ******** ***** detection ***** ** ******* 90° ** ** **** as 180°, ********* ** *****. Motion ********* *** * Fresnel ****, ***** ******* light **** **** *********** than * ******** **** of ********** *********. **** allows **** **** ******** radiation ** ***** *** pyro.

** ** ********** **** efficient ** ****** **** of ***** ********* ***** instead ** *** **** detection *****. **** ****** the ****** ******** ** detect ******** **** ****** and ****** *** ********* of ***** ******. *** this ******, *** **** in ***** ** *** pyro has * ***** ****** of *****-********, **** ** which ********** ** ** alternating **** ** *** pyro. 

********* 

***** ******** ********* *** passive, ********* ******* ** the ****** ** ********** infrared *********, ********* ****** sensors *** ******, ******* radio ***** *** ********* the **** ** ***** to ****** ****. ******* in *** ****** ** time *** ***** **** to ****** ** *** sensor *** *********** ** motion *** ***** ** alarm *********.

** ********* ********* ****** heat *******, **** *** less ****** ** ** confused by **** **** ************ or ******* ******* *******. Microwave ********* **** **** drawbacks. ********* **** ******* objects ****** ******* ** away **** *** ********, and ****** *** ******* movement. ********* ********** **** walls, ***** ***** ***** the ****** ** ****** normal *** ****** ******. Microwave ****** ********* *****, and ***** ***** ******* in ***** ** *** detector ***** ****** * dead ****. ************, ********* ***** motion ********* *** ***** K **** ********** ******* of * **** **********, which ** **** ****** to ************* ********* *****, and ********* **** ****** to *****.

Movement ********

** ** ****** ** cut **** ** ***** alarms, ************* *** ***********-******** integrated ******** (*****) ****** with ******** ********. ***** microcontrollers try ** ********* *** way *** ********* ***** swing **** ********* ******, and **** ** ***** those ****** ******* ************* profiles. *** ******* ** the *************** ** ** *** intelligence ** *** ****** detector, ******** *** ******** ** tell *** ********** ******* a ****** ******* ******* in *** **** *** a ***** ******** ******** the ********* ****. ***** processors *** **** ************* movement ******** **** ******** the ****** ** ***** alarms, *** *************** ***** **** not *** ******* ***** alarms ** ********** ******. 

Dual **********

** ********** ****** ** lead ** ******** ***** alarms, **** ********** ****** to *** **** ********** motion *********. **** ********** detectors *** *** ********* detection ************, ******* ******* infrared and *********. *** *** technologies **** **** ** "agree" ****** ******** ** alarm *********. ** ******, this ** * **** way *** *** ********* of *** ********** ** compensate *** *** ********** of *** *****. *** implementation ** **** "*********" differs **** ************ ** manufacturer, *** ********* **** product ** *******.

**** ******** *** ******** processors ***** "*****" *** environment **** *** ****** in, *** *** ********* technology **** **** ********** ignore *** ******* ** the ********* ****. *** example, * **** ********** motion ******** ****** * ceiling *** **** **** learn ** ****** *** movement ** *** ***, as ** **** ***** the ********* *** *** the ***. 

*** ****** ** ******** dual ********** ****** ********* is **** **** ******* the ****** ******** **** not ***** ******* **** not ****** *** **** that *** **** ** simply ******** *** * motion ********. *** *******, a ******** *** ****** a ***** ***** **** or * ********* **** false *****, *** ** the **** ** *** fireplace ** *** ***** reflecting *** *** *****. Replacing *** *** ****** detector **** * **** technology ****** ******** **** cause *** ***** ****** to ****. *******, *** fundamental ******* *** *** **** away. ** ******** *** carefully ***** ****** *** field ** ********* *** *** cause *** ****** ******** to ** **** * state ** *****, ******* ********* only **** ****** **** gets ****** ** ******* away, *** ****** **** moves **** **** ** side. *** ** *** technology **** *** ****** lateral ********, *** *** microprocessor has "*******" ** ****** movement ** *** ******* of *** ********* **** that ********* ****** ***** alarms. *** ****** ******** is ******* *** *** microwave *** *** *** to **** ***** **** motion *** ********** ********, but **** **** ***** happen, ********* *** **** nearly unprotected.

**** ********** ****** *** dual ********** ********* ***********. With **** **** ********** motion ********* ****** ** low, **** ** *** see *** *** ** using PIRs **** ** ********* where **** ***** *******. However, **** *** ********* priced ******* **% *** 25% ******* **** **** technology *********. **** ******* so *** *** ***** installations, **** ****** $** per *** ***** ** the ********** ******* * profitable ***** *** * break-even *****. 

********* ********

*** ****** ********* ******* *** expected ******** ****. ********** should ** **** ** match *** ******** ******** area ** *** ********* performance ** ******* ** possible. ********* ***** ********* require * **** ** bounce *** **, *** even **** ****** * profile ** *** ********* space **** ******** ** ignore ****** ******* ** false ******, *** **** learning ******* ******** * wall ** ****** *** outer **** ** *** protected *****. ****** * camera, * ****** ******** cannot ****** ***** *** to ******** *** ******* should have * **** ******* to *** **, **** as * ****. 

*********, ***** * ****** detector ***** *** * distance ** **' (**.** meters) ** * ***** much ****** **** **** will ******* *********** **** from ******** *** *****, and **** ******* **** technology ********* **** ***** microwaves, ** ***** *****:

***** * ****** ******** to ******* ** **** significantly ******* **** *** stated ***** ******** ******** as ****. *** ************** is ********* ** *** and ******** ******. ***** ****** are ********** ** *** subjects ***** * ******** distance **** *** ****** detector. ** ** ****** is ************* ****** **** any ** *** ******** the ****** ******** *** in *** *******, ** will *** ** **** to ******** **, *** most ****** ********* **** ************* go **** ** ***** state. **** *** **** ** significantly **** ***** ****** from ********* ******* **** as ******* ******** ** the ******* ** *** detector ** ******** ***** blown ** ******* *******. 

****** ********* *** ********* in ******* ********, **** of ***** *** ******** for ******** *****. **** motion ********* *** **********, and *** ******* ******** tasks. ****** *** ******* different ***** ** ******** out *** ****, ***** changes *** ********* **** pattern. The **** *** ***** of *** ********* **** is ******* ****** ** the ******, **** *****, and ********* **** *** box ********** *** ****** detector. ********** ****** ** sure ** ****** * motion ******** **** * detection **** **** ******* the **** ** ** covered ** ******* ** possible.  

Look-Down **********

**** ****** ******** ****** include ******** ****, **** called ***** **** **********. This ** * ****** lens **** ******* *** pyro ******* *** **** beneath *** ****** ********, preventing ********* **** ******* the ****** ******** ** crawling ** *** *****. Many models ********* ***** **** ********** to ** ******** ** locations **** **** ** rodents *******.

Pet ********

**** ********** ****** ********* on ***** **** ****, installers *** **** ** use *** ****** ****** detectors. ***** *** *** types ** ****** ********* designed ** **** ****** pets. *** ******** ****** detectors *** * **** sophisticated ************** **** ** extensive ******* ** *** shapes *** ******** ********, where *** ****** ********* combine ************* *************** **** dual **********. ********* ********, pet ******** ********* ****** be ********** *** ******* pets ******** ***** ** ****** (18kg), ***** **** ********** detectors *** *********** *** pets ***** ****** (****). Multiple ****, ********** **** and ***** ******** ****, may **** ***** **** dual ********** ********* ***********. For **** ***********, *** our*** ****** ****** ******** overview.

********

**** ****** ********* ******* antimasking **********. ** **** of *** ****-******* *******, the ****** ******** **** periodically ******* *** **** to ****** **** *** size, *****, ******* ******, and ********** **** ** the ********* **** *** not *******. ** *** detector ****** ******* *** area, ** ********* **** its **** *** **** covered *** ***** * trouble ******. * ****** tactic ** ************ ******** crews ** ** ******* the ***** ** * business ****** *** ***, while ** ** ********. The **** *** **** break ** ***** ***** or ***** * "****-******" to *** *** **** in. *** *** ** disable *** ***** ** to ***** ****** *********, or *** ** ******* to ***** ****, **** tape ** * ***** of *****, ******** *** detector. Antimasking ********** ****** *** user ** * *******, so **** *** ***** and ****** *** *****. When ***** ******* **********, the *** **** **** be ******* ** ********** check *** ********, *** should ** ********** ** develop ********** ** **** with * ********* *****-**. 

Mounting *******

*** ****** *** ******** profiles ** *** **************'* library ** ********** ** an ******** ******** *** detection **** ** ************* ways. **** ** **** predetermination ** *** *** detection ***** **** ****** a ****** ******, ********* at **** *****. *** that ******, *** *********** mounting ****** ** *** detector **** ** ******* to. ******** *** ******** too *** *** ***** *** detector ** *********** *** movement, ******* ** ***** alarms. ******** ** *** high **** ***** * blind **** ***** *** detector, **** ** *** motion ******** *** * creep ****. 

Insects ******** ***** ******

******* **** ** ********* by *** ****** ** a ****** ******** *** will **** ******. ******* crawling ****** ** *** inside ** *** **** or **** *** **** will ** *********** ** motion. *********, *** ******** to **** *** ***** in *** ****** ******** housing, ********* **** ********* and ***** *****. 

Heat ******* ******** ***** ******

****** ********* ****** *** face **** ******* ** possible. ***** *** ********** and ******* ***** ****** choosing * **** ** mount *** ****** ********, and **** *** ******** that *** ****** ******** may ***** ** **** place * ******** ****** in *** ********* ****. 

Reflective ******** ******** ***** ******

****** ********* ****** *** face ********** ******** ** possible. ********** ********, ********** polished ** ********* *****, will ******* *** **** source, ***** *** ****** detector *** ******** ** motion. **** ********* ***** may ****** *** **** signature ** *** **** sufficiently ** ** ******** as ******. ******** *** been ***** ** **** objects ****** *** ********* area ************ ** ***** false ******, ** ***** facing the ****** ******** ******* large ***** ** ****** or ***** *******. ***** sources **** *****, **** as ***** ** ******, can **** ********* ***** reflections ********** ** ****** the ******** ******* ** the ****. 

Hanging ***** ******** ***** ******

*****, ********, ***** ********, and ***** ******* **** hang **** *** ******* and *** **** ** breezes ****** ** ******* air ************ ** ******* are *** ****** ******* of ***** ******. ******* placement ** ******** **** installing motion ********* ** ******* stores *** ***** ****** locations. ******* ******* *** other ******** ******** *** also ** ********** ** change *** ** ******* of *** ********* ****, leading ** ***** ******. 

Screw ************** ******** ***** ******

************** ** *** ******** screws *** **** *** housing ** *** ****** detector, ***** ** **** may warp *** **** ******* Fresnel ****, ********** ******** the **** *** ***** of *** ********* ****. Care **** ** ***** by *** ********** ********** not ** **** ** twist *** ******* ** any ***. 

Multiple ** ******** **** ******** ***** ****** 

*** ****** ****** ********* work **** **** ****** pets *** **** ** stay ** *** *****, but **** *** ** able ** ******* *** climbing *******, **** ** cats, ** ******** ******* in *** ********* **** at ****. *** *** customer ***** *** ****** and *********** ** ***** pets ****** ******** ** add * ****** ********.  

Detection **** **** *** ******** ************ **** ********* ***** ******

****** ********* **** * large, **** *******, **** as * ****, ** terminate *******. *********, *** IR ********* ** *** detection **** *** ****** in ********** ****, ******* to ***** ******. 

Hot ***** 

****** ********* ******* * background ********** ** *.*°* (2°C) ** ****. *********, they ****** *** ** used ** ***** **** regularly *** **** ***. Do *** ******* ****** detectors ** ********* ** near ********* **** *** ***** ************ of **°* (**.*°*) ** more. 

Selection *****

****** ****: ********* ****** ******* ******, reflective ********, ***** ******. Recommendation ** **** ********** motion ******** **** ******** technology.

 

****** **** **** ***: ********* ****** ******* ******, medium ***** ***, ********* heater. ************** ** *** immune ****** ******** (*****) with ***** **** ********.

 

*******: ********* ****** ******* ****, reflective ********, **** **** oven, ***** *****. ************** is ***** ****** ******** above ****, ****** ******, angled **** **** ****. Use **** ********** **** white-light ********. 

 

********** *******: ********* ****** ******* *******, moisture, ******* ******* **** ceiling, ********** ******** ************** is ** ****** ****** detector **** *** ******* mounting ******, *** ***** light ********. **** ******* completely **** ********. 

 

********: ********* ****** ******* ******** makes ** **** *** intruders ** ***** ***** and ***** ****, *** heat *** ****** ***** from ******** ***** ******* false ****** ******. *************** include ****** ****** ******** with "*******" ****, ***** will ******* * ****** area **** ***** *** skylight. ********* ****** ******* the ******** **** ** detected, *** *** **** of *** **** **** be *******.

 

Comments (6)

The is one of the best articles on motion detectors I've read.  I've been using motion detectors for over 30 years and have experienced everything outlined here.  When pet immune motion detectors were introduced, I was skeptical at first but then found them to be suitable for just about most of my installs.  However, great care must be used when cats are involved.  You might as well consider cats to have wings when considering motion detectors. 

In the early days of pet immune detectors, one of my installs, with two cats in the home, used a pet immune PIR detector in a hallway that looked into an office.  I followed the manufacturer's instructions to the letter, but had a false alarm.  I returned to the job and relocated the detector on the opposite end of the hallway where it did not see into any other room, also masked off a few places on the lens.  I walk tested and the motion detector picked me up just fine.  No more false alarm since.

Good article, but what about outdoor pir detectors can we use IP enabled motion detectors particularly expensives or plug and play detectors triggering camera inputs (never easy to install due to the voltage). Best regards.

In my experience, outdoor PIRs can generate quite a few false alarms unless their detection sensitivity is adjusted to avoid tripping on animals and blowing trash.

In my area, true perimeter detection is best served by other methods like thermal, fence detection (fiber/leaky coax).  Ground based radar (ie: SpotterRF) or wide-area seismic detection (ie: QTSI Seismic Acoustic) may be a better solution for accurately triggering camera inputs, although they are much more expensive than PIR units.

Outdoor motion detectors used to be far more common before the days of digital recorders and video motion detection. We would connect the motion detector to the VCR and have the sensor trigger recording. Later, we started using relays with timers. In my experience, video motion detection is about as good as using a PIR. 

If you do want outdoor motion detection, I would recommend you get something with advanced signal processing, logic, and dual detection technology. 

That said, there are outdoor motion detectors designed specifically to work with CCTV, some of which can even be powered by PoE- the Redwall from Optex is one example. 

If you must use motion detection outdoor, consider laser lines. This way, you can trigger an event whenever a large object such as a human or vehicle crosses the laser. These tend to be more reliable over large areas with fewer (although of course not zero) false alarms. 

Best explanations on detectors that I've ever read.  Thank you!

Great Article!

There are many Ip outdoor cameras that have inputs and outputs to use as triggers for notifications or tripping alarms. You can set them up to work in almost any situation. You can adjust the sensitivity better for size or for just certain areas where a motion is not as forgiving. I have used outdoor motions in the past in high secure areas. Setup is not fun and usually takes a lot of time to setup properly. You will still have "false alarms" because of birds and wind.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

Directory of 68 Video Surveillance Startups on Sep 18, 2019
This directory provides a list of video surveillance startups to help you see and research what companies are new or not yet broadly known. 2019...
Scylla AI Video Analytics Company Profile on Aug 29, 2019
Scylla, an AI analytics startup, says they are targeting 1 Billion dollar valuation in 5 years and it "is not rocket science" to detect weapons and...
Proactive CCTV "Only Affordable Video Archiving Solution" Profile on Aug 12, 2019
Proactive CCTV is claiming to offer "the only affordable video archiving solution on the market", reducing the storage typically required for H.265...
ProdataKey (PDK) Access Company Profile on Aug 09, 2019
Utah based ProdataKey touts low cost cloud access, wireless controllers, and no dealer required national distribution availability. But how does...
Dahua Analytics+ Tested on Aug 07, 2019
Dahua's analytics have performed poorly in past shootouts. But now, they claim their new Analytics+ "algorithms significantly improve accuracy and...
Razberi Technologies Company Profile on Aug 06, 2019
Razberi says they have doubled their revenue in the first half of 2019, citing their proprietary camera hardening and cybersecurity capabilities...
Hikvision 4K Camera Shootout on Aug 02, 2019
With their latest Smart Series 5 cameras, Hikvision is claiming cameras "fully loaded" with "state-of-the-art technology for high performance and...
Online Video Surveillance Sales Comparison - Amazon, B&H, CDW, LTS, Super Circuits, More on Jul 31, 2019
IPVM has uncovered the key trends and top options being offered across commonly used surveillance sellers. How has the market shifted since we...
Ionodes Company Profile on Jul 31, 2019
What happened to Ionodes? With seasoned leadership from Jean-Paul Saindon founder of SmartSight and Dr. Michael Gilge, founder of VCS, back in...
Australia Security Full Show Report on Jul 25, 2019
IPVM went to Australia attending the 3 days of the Australia Security Exhibition: This was held at the ICC Sydney, as shown below: In this...

Most Recent Industry Reports

Open Access Controller Guide (Axis, HID, Isonas, Mercury) on Sep 19, 2019
In the access control market, there are many software platforms, but only a few companies that make non-proprietary door controllers. Recently,...
Axis Perimeter Defender Improves, Yet Worse Than Dahua and Wyze on Sep 19, 2019
While Axis Perimeter Defender analytics improved from our 2018 testing, the market has improved much faster, with much less expensive offerings...
Directory of 68 Video Surveillance Startups on Sep 18, 2019
This directory provides a list of video surveillance startups to help you see and research what companies are new or not yet broadly known. 2019...
Uniview Prime Series 4K Camera Tested on Sep 18, 2019
Is the new Uniview 'Prime' better than the more expensive existing Uniview 'Pro'? In August, IPVM tested Uniview 4K 'Pro' but members advocated...
US Army Base To Buy Banned Honeywell Surveillance on Sep 17, 2019
The U.S. Army's Fort Gordon, home to their Cyber Center of Excellence, has issued a solicitation to purchase Honeywell products that are US...
Vivotek "Neural Network-Powered Detection Engine" Analytics Tested on Sep 17, 2019
Vivotek has released "a neural network-powered detection engine", named Smart Motion Detection, claiming that "swaying vegetation, vehicles passing...
Schmode is Back, Aims To Turn Boulder AI Into Giant on Sep 16, 2019
One of the most influential and controversial executives in the past decade is back. Bryan Schmode ascended and drove the hypergrowth of Avigilon...
Manufacturers Unhappy With Weak ASIS GSX 2019 And 2020 Shift on Sep 16, 2019
Manufacturers were generally unhappy with ASIS GSX, both for weak 2019 booth traffic and a scheduling shift for the 2020 show, according to a new...
How Cobalt Robotics May Disrupt Security on Sep 13, 2019
While security robots have largely become a joke over the last few years, one organization, Cobalt Robotics, has raised $50+ million from top US...
Panasonic 4K Camera Tested (WV-S2570L) on Sep 13, 2019
Panasonic has released their latest generation 4K dome, the WV-S2570L, claiming "Extreme image quality allows evidence to be captured even under...