********
**** ********* ** ***** ******, ********** should *** ****** ** ********** ** detect *********. *** *******, ******** ** entryways **** ****** ***** ** ******* opening *** *******. ** ** **** practice, *******, ** **** * ****** layer ** ********** ** **** ** intruder ******** ** ******** ***** ********. With ****** ********* ********** *** ******** spaces *** ******** ********** *** ********, it ** **** ****** **** ** intruder **** ** **** ** **** entry **********. ******** *** ****** ********* supplement **** *****, ****** **** ********* each *****. ***** **** *** ** the ***** ***** **** * ************ burglar *** ** **** ** ****** the ***** ******.
Passive ******** ********* (***) *********
*** ****** **** ******** ********* ** the **** ** ****. ****** ********* use ************* ******, ***** ****** *****, ** ****** **** ****. *** most ***** ****** ********* *** * pyro ***** ** ****. ** ** object ***** ** ***** ** *** half ** *** ****, *** ****** of ******* ******** ********* **** ********, causing *** ******* ** *** **** to ***** **** ******** ** *** other ****. ** *** ****** ********* to **** ** ***** ** *** other **** ** *** ****, *** relative ********* ******* **** ****** *****, leaving *** ****** **** ** ***** higher **** *** *****. ****** ********* use **** ********** ** **** * signal ** *** ***** *****.
*** ***** **** ******* *** *********** detection ***** ******* ******** *****. ****** detectors *** * **** **** ** thin ******* ** ***** ***** ********* zones *******, ******** ***** ********* ***** to ******* **° ** ** **** as ***°, ********* ** *****. ****** detectors *** * ******* ****, ***** focuses ***** **** **** *********** **** a ******** **** ** ********** *********. This ****** **** **** ******** ********* to ***** *** ****.
** ** ********** **** ********* ** create **** ** ***** ********* ***** instead ** *** **** ********* *****. This ****** *** ****** ******** ** detect ******** **** ****** *** ****** the ********* ** ***** ******. *** this ******, *** **** ** ***** of *** **** *** * ***** number ** *****-********, **** ** ***** correspond ** ** *********** **** ** the ****.
Microwave
***** ******** ********* *** *******, ********* changes ** *** ****** ** ********** infrared *********, ********* ****** ******* *** active, ******* ***** ***** *** ********* the **** ** ***** ** ****** back. ******* ** *** ****** ** time *** ***** **** ** ****** to *** ****** *** *********** ** motion *** ***** ** ***** *********.
** ********* ********* ****** **** *******, they *** **** ****** ** ** confused ** **** **** ************ ** central ******* *******. ********* ********* **** some *********. ********* **** ******* ******* moving ******* ** **** **** *** detector, *** ****** *** ******* ********. Microwave ********** **** *****, ***** ***** cause *** ****** ** ****** ****** and ****** ******. ********* ****** ********* metal, *** ***** ***** ******* ** front ** *** ******** ***** ****** a **** ****. ************, ********* ***** motion ********* *** ***** * **** technology ******* ** * **** **********, which ** **** ****** ** ************* penetrate *****, *** ********* **** ****** to *****.
Movement ********
** ** ****** ** *** **** on ***** ******, ************* *** ***********-******** integrated ******** (*****) ****** **** ******** profiles. ***** **************** *** ** ********* the *** *** ********* ***** ***** into ********* ******, *** **** ** match ***** ****** ******* ************* ********. The ******* ** *** *************** ** to *** ************ ** *** ****** detector, ******** *** ******** ** **** the ********** ******* * ****** ******* blowing ** *** **** *** * human ******** ******** *** ********* ****. Newer ********** *** **** ************* ******** profiles **** ******** *** ****** ** false ******, *** *************** ***** **** not *** ******* ***** ****** ** acceptable ******.
Dual **********
** ********** ****** ** **** ** multiple ***** ******, **** ********** ****** to *** **** ********** ****** *********. Dual ********** ********* *** *** ********* detection ************, ******* ******* ******** *** microwave. *** *** ************ **** **** to "*****" ****** ******** ** ***** condition. ** ******, **** ** * good *** *** *** ********* ** one ********** ** ********** *** *** weaknesses ** *** *****. *** ************** of **** "*********" ******* **** ************ to ************, *** ********* **** ******* to *******.
**** ******** *** ******** ********** ***** "learn" *** *********** **** *** ****** in, *** *** ********* ********** **** will ********** ****** *** ******* ** the ********* ****. *** *******, * dual ********** ****** ******** ****** * ceiling *** **** **** ***** ** ignore *** ******** ** *** ***, as ** **** ***** *** ********* and *** *** ***.
*** ****** ** ******** **** ********** motion ********* ** **** **** ******* the ****** ******** **** *** ***** anymore **** *** ****** *** **** that *** **** ** ****** ******** for * ****** ********. *** *******, a ******** *** ****** * ***** patio **** ** * ********* **** false *****, *** ** *** **** of *** ********* ** *** ***** reflecting *** *** *****. ********* *** PIR ****** ******** **** * **** technology ****** ******** **** ***** *** false ****** ** ****. *******, *** fundamental ******* *** *** **** ****. An ******** *** ********* ***** ****** the ***** ** ********* *** *** cause *** ****** ******** ** ** into * ***** ** *****, ******* microwave **** **** ****** **** **** closer ** ******* ****, *** ****** that ***** **** **** ** ****. PIR ** *** ********** **** *** detect ******* ********, *** *** ************** has "*******" ** ****** ******** ** the ******* ** *** ********* **** that ********* ****** ***** ******. *** motion ******** ** ******* *** *** microwave *** *** *** ** **** agree **** ****** *** ********** ********, but **** **** ***** ******, ********* the **** ****** ***********.
**** ********** ****** *** **** ********** detectors ***********. **** **** **** ********** motion ********* ****** ** ***, **** do *** *** *** *** ** using **** **** ** ********* ***** PIRs ***** *******. *******, **** *** typically ****** ******* **% *** **% cheaper **** **** ********** *********. **** margins ** *** *** ***** *************, even ****** $** *** *** ***** be *** ********** ******* * ********** month *** * *****-**** *****.
Detection ********
*** ****** ********* ******* *** ******** coverage ****. ********** ****** ** **** to ***** *** ******** ******** **** to *** ********* *********** ** ******* as ********. ********* ***** ********* ******* a **** ** ****** *** **, and **** **** ****** * ******* of *** ********* ***** **** ******** to ****** ****** ******* ** ***** alarms, *** **** ******** ******* ******** a **** ** ****** *** ***** edge ** *** ********* *****. ****** a ******, * ****** ******** ****** simply ***** *** ** ******** *** instead ****** **** * **** ******* to *** **, **** ** * wall.
*********, ***** * ****** ******** ***** for * ******** ** **' (**.** meters) ** * ***** **** ****** than **** **** ******* *********** **** from ******** *** *****, *** **** prevent **** ********** ********* **** ***** microwaves, ** ***** *****:
***** * ****** ******** ** ******* an **** ************* ******* **** *** stated ***** ******** ******** ** ****. The ************** ** ********* ** *** and ******** ******. ***** ****** *** predicated ** *** ******** ***** * specific ******** **** *** ****** ********. If ** ****** ** ************* ****** than *** ** *** ******** *** motion ******** *** ** *** *******, it **** *** ** **** ** classify **, *** **** ****** ********* will ************* ** **** ** ***** state. **** *** **** ** ************* more ***** ****** **** ********* ******* such ** ******* ******** ** *** outside ** *** ******** ** ******** being ***** ** ******* *******.
****** ********* *** ********* ** ******* patterns, **** ** ***** *** ******** for ******** *****. **** ****** ********* are **********, *** *** ******* ******** tasks. ****** *** ******* ********* ***** by ******** *** *** ****, ***** changes *** ********* **** *******. *** size *** ***** ** *** ********* zone ** ******* ****** ** *** manual, **** *****, *** ********* **** the *** ********** *** ****** ********. Installers ****** ** **** ** ****** a ****** ******** **** * ********* zone **** ******* *** **** ** be ******* ** ******* ** ********.
Look-Down **********
**** ****** ******** ****** ******* ******** mode, **** ****** ***** **** **********. This ** * ****** **** **** focuses *** **** ******* *** **** beneath *** ****** ********, ********** ********* from ******* *** ****** ******** ** crawling ** *** *****. **** ****** recommend ***** **** ********** ** ** disabled ** ********* **** **** ** rodents *******.
Pet ********
**** ********** ****** ********* ** ***** with ****, ********** *** **** ** use *** ****** ****** *********. ***** are *** ***** ** ****** ********* designed ** **** ****** ****. *** tolerant ****** ********* *** * **** sophisticated ************** **** ** ********* ******* of *** ****** *** ******** ********, where *** ****** ********* ******* ************* microprocessors **** **** **********. ********* ********, pet ******** ********* ****** ** ********** for ******* **** ******** ***** ** pounds (****), ***** **** ********** ********* are *********** *** **** ***** ****** (45kg). ******** ****, ********** **** *** other ******** ****, *** **** ***** even **** ********** ********* ***********. *** more ***********, *** ****** ****** ****** ******** ********.
********
**** ****** ********* ******* *********** **********. As **** ** *** ****-******* *******, the ****** ******** **** ************ ******* the **** ** ****** **** *** size, *****, ******* ******, *** ********** heat ** *** ********* **** *** not *******. ** *** ******** ****** measure *** ****, ** ********* **** its **** *** **** ******* *** sends * ******* ******. * ****** tactic ** ************ ******** ***** ** to ******* *** ***** ** * business ****** *** ***, ***** ** is ********. *** **** *** **** break ** ***** ***** ** ***** a "****-******" ** *** *** **** in. *** *** ** ******* *** alarm ** ** ***** ****** *********, or *** ** ******* ** ***** them, **** **** ** * ***** of *****, ******** *** ********. *********** technology ****** *** **** ** * problem, ** **** *** ***** *** remove *** *****. **** ***** ******* technology, *** *** **** **** ** trained ** ********** ***** *** ********, and ****** ** ********** ** ******* procedures ** **** **** * ********* break-in.
Mounting *******
*** ****** *** ******** ******** ** the **************'* ******* ** ********** ** an ******** ******** *** ********* **** in ************* ****. **** ** **** predetermination ** *** *** ********* ***** will ****** * ****** ******, ********* at **** *****. *** **** ******, the *********** ******** ****** ** *** detector **** ** ******* **. ******** the ******** *** *** *** ***** the ******** ** *********** *** ********, leading ** ***** ******. ******** ** too **** **** ***** * ***** spot ***** *** ********, **** ** the ****** ******** *** * ***** zone.
Insects ******** ***** ******
******* **** ** ********* ** *** warmth ** * ****** ******** *** will **** ******. ******* ******** ****** on *** ****** ** *** **** or **** *** **** **** ** interpreted ** ******. *********, *** ******** to **** *** ***** ** *** motion ******** *******, ********* **** ********* and ***** *****.
Heat ******* ******** ***** ******
****** ********* ****** *** **** **** sources ** ********. ***** *** ********** and ******* ***** ****** ******** * spot ** ***** *** ****** ********, and **** *** ******** **** *** motion ******** *** ***** ** **** place * ******** ****** ** *** detection ****.
Reflective ******** ******** ***** ******
****** ********* ****** *** **** ********** surfaces ** ********. ********** ********, ********** polished ** ********* *****, **** ******* any **** ******, ***** *** ****** detector *** ******** ** ******. **** reflected ***** *** ****** *** **** signature ** *** **** ************ ** be ******** ** ******. ******** *** been ***** ** **** ******* ****** the ********* **** ************ ** ***** false ******, ** ***** ****** *** motion ******** ******* ***** ***** ** carpet ** ***** *******. ***** ******* that *****, **** ** ***** ** timers, *** **** ********* ***** *********** sufficient ** ****** *** ******** ******* of *** ****.
Hanging ***** ******** ***** ******
*****, ********, ***** ********, *** ***** objects **** **** **** *** ******* and *** **** ** ******* ****** by ******* *** ************ ** ******* are *** ****** ******* ** ***** alarms. ******* ********* ** ******** **** installing ****** ********* ** ******* ****** and ***** ****** *********. ******* ******* and ***** ******** ******** *** **** be ********** ** ****** *** ** profile ** *** ********* ****, ******* to ***** ******.
Screw ************** ******** ***** ******
************** ** *** ******** ****** *** warp *** ******* ** *** ****** detector, ***** ** **** *** **** the **** ******* ******* ****, ********** changing *** **** *** ***** ** the ********* ****. **** **** ** taken ** *** ********** ********** *** to **** ** ***** *** ******* in *** ***.
Multiple ** ******** **** ******** ***** ******
*** ****** ****** ********* **** **** with ****** **** *** **** ** stay ** *** *****, *** **** not ** **** ** ******* *** climbing *******, **** ** ****, ** multiple ******* ** *** ********* **** at ****. *** *** ******** ***** the ****** *** *********** ** ***** pets ****** ******** ** *** * motion ********.
Detection **** **** *** ******** ************ **** ********* ***** ******
****** ********* **** * *****, **** surface, **** ** * ****, ** terminate *******. *********, *** ** ********* in *** ********* **** *** ****** in ********** ****, ******* ** ***** alarms.
Hot *****
****** ********* ******* * ********** ********** of *.*°* (*°*) ** ****. *********, they ****** *** ** **** ** areas **** ********* *** **** ***. Do *** ******* ****** ********* ** locations ** **** ********* **** *** reach ************ ** **°* (**.*°*) ** more.
Selection *****
****** ****:********* ****** ******* ******, ********** ********, large ******. ************** ** **** ********** motion ******** **** ******** **********.
****** **** **** ***: ********* ****** ******* ******, ****** sized ***, ********* ******. ************** ** Pet ****** ****** ******** (*****) **** creep **** ********.
*******: ********* ****** ******* ****, ********** surfaces, **** **** ****, ***** *****. Recommendation ** ***** ****** ******** ***** door, ****** ******, ****** **** **** oven. *** **** ********** **** *****-***** immunity.
********** *******: ********* ****** ******* *******, ********, objects ******* **** *******, ********** ******** Recommendation ** ** ****** ****** ******** with *** ******* ******** ******, *** white ***** ********. **** ******* ********** with ********.
********: ********* ****** ******* ******** ***** it **** *** ********* ** ***** glass *** ***** ****, *** **** and ****** ***** **** ******** ***** regular ***** ****** ******. *************** ******* choose ****** ******** **** "*******" ****, which **** ******* * ****** **** just ***** *** ********. ********* ****** through *** ******** **** ** ********, but *** **** ** *** **** will ** *******.
Comments (6)
Undisclosed Integrator #1
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.
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guy fauquembergue
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.
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Joseph Marotta
Best explanations on detectors that I've ever read. Thank you!
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Undisclosed Integrator #2
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.
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