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How does an infrared motion sensor work? - Home Security

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It detects a change in temperature.Everything in the room gives off a certain amount of heat. If a person enters, the heat in the room will change. The sensor will be able to detect the new change in the heat.

Posted on Jan 16, 2013

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Posted on Jan 02, 2017

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Replacing a one way light switch with a infrared motion sensor. Sensor has N,L,A connection points. brown to L. blue to N and green to old earth on socket base. What is the A for ? Not working Joh


It is best not to speculate about this - you need to refer to the data sheet for the switch. The passive infrared sensor will require a low voltage for operation which it will derive from the mains (probably) but that would usually require a neutral to be present in some form.

A neutral of sorts could be derived from the circuit through the load, but only while it is switched off) or from the earth connection, which is a practice that is frowned upon.

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When do security lights know to turn on?


It depends on the model and type but most have a motion sensor to detect movement.

Jan 10, 2013 | Home Security

1 Answer

How can you detect the presence of infrared spy + motion sensor hidden devices?


There are sensing devices available but they are expensive. Why would you want to detect these if you don't want to commit a crime?

Dec 13, 2012 | Home Security

1 Answer

Passenger sliding door will not work automatic


Automatic sliding doors use optical or motion detection sensors to activate their motorized opening and closing functions. These sensors are mounted over the automatic door. The sensors use either infrared or microwave technology to observe motion.------------------------------------------------------------------------------
Car Diagnostic Tools

Nov 29, 2012 | 2007 Kia Sedona 3.8

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User manual for fl09sbk light


It appears this device is rate 10 amps at 230 volts = 2300 watts.
Use at least #14 wire and 15 amp breaker.
Connect wire at connection point on light.
Unit appears to have a transformer, and might make humming sound.
There is override located somewhere on unit. Possibly as a button on the motion sensor

If infrared motion detector requires separate wiring connection, then use following wiring illustration:
http://waterheatertimer.org/images/How-to-wire-motion-sensor-230V.jpg

Motion sensor will probably have 2 settings.
1st setting for sensitivity, so it will not activate when cat walks up driveway.
2nd setting for time duration, selectable from 30 seconds to 7 minutes

ML FL09SBK IP44 36W Fluorescent PIR Floodlight c/w Lamp

IP44 Low Energy Floodlight c/w PIR & Override.
Black finish.
T4 twist and lock lampholder.
36 Watt 6500k T4 spiral compact fluorescent lamp included.
(replacement lamp - product code FL09L).
Electrical termination via 10 Amp connector block within secure enclosure c/w cord grip.
PIR detection range of 12 meters at 2 meter height from ground.
Detection arch of 160 degrees.
Time range 30 seconds to 7 minutes.
Manual override.

Nov 12, 2012 | Woods Outdoor Lighting Timer

1 Answer

My Motion detector #5512 quit working after we had our house washed. One bulb was out so I replaced that. Both bulbs glow but do not turn on.


Reset circuit breaker.
Check if you are on a GFCI circuit.

Probably there is no hope, but the sensor has to be removed to replaced, so take it off and hang it upside down and let dry in sun.
There is no repair protocol for fixing motion detectors, because there are no replaceable parts, or circuit boards.
Cover outdoor electronics with plastic bag when washing house. That includes light and pool timers, breaker boxes, low voltage timers, infrared cameras, motion detectors, alarm boxes, etc.
Should the power wash contractor know this? Maybe yes.
We never covered things when washing houses, and we washed 100s per year, but I told the guys not to put pressured water directly on any outdoor electrical system.
Can you prove that the sensor stopped because of washing. No.
The unit could have simply stopped working.earlier that morning, without provocation.

Jul 16, 2012 | Heath Zenith SL-6136-WH Basic Solutions...

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I there any way to adjust the snsitivity of the motion sensor? Wind blowing seems to set it off


U CAN PUT TAPE ON THE SENSOR IN BOTH DIRECTIONS TILL THERE IS ONLY ABOUT A 1/8" HOLE IN THE CENTER AND IT WILL STILL PICK UP MOTION AS SOMEONE WALKS BY IT. JUST START AT THE BOTTOM AND WORK UP OR START ON THE SIDE TILL U GET IT TO WHERE U WANT IT. I PUT A PIECE OF TAPE ON THE BOTTOM THEN A PIECE ON TOP. THEN A PIECE ON TOP OF THE BOTTOM PIECE SO IT COVERED ANOTHER 1/8", THEN ANOTHER PIECE ON TOP OF THE TOP PIECE AND SO ON TILL I TUNED IT IN TO JUST HOW I WANTED IT. GOOD LUCK.

Feb 10, 2011 | Alert Driveway Patrol Infrared Wireless...

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I have a sensor that stays on all night when the


Your motion detector is based on infrared or heat sensing technology. Moving air or wind will make your unit more sensitive to false alarming. Here are a few things for you to check: 1) make sure your unit is sealed. Any holes or openings in the unit's casing will affect operation. 2) you may need to readjust the unit's sensitivity. There may be an adjustment pod or jumper inside the detector to reduce sensitivity. 3) make sure the unit is mounted securely. If the wind causes the detector to move, even slightly, this could be the cause of your problem.

Jan 19, 2010 | Heath Zenith 270 Degree Replacement Motion...

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