Ceiling light sensor

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Ceiling Occupancy Sensor High Bay SensorOne of the easiest ways to save energy when it comes to lighting is to simply turn the lights off when leaving a room. While this sounds simple enough, it’s also one of the easiest tasks to forget. As time goes on, lighting technology continues to advance. Also advancing is the technology being used with light bulbs and fixtures. Installing a ceiling occupancy sensor or a high bay sensor is a quick way to start cutting energy use and costs in any building, especially in commercial spaces that undoubtedly consume more energy than residential properties.

How do sensors work?

The sensors use what is known as passive infrared technology (PIR) that turn lights on and off based on two factors: ambient light levels and occupancy. As long as the ambient light is at a certain level, the sensor will keep the lights from turning on. They can also be set to turn the lights on and keep them on as long as occupancy, or movement, is detected. After the allotted time has passed, or no movement is picked up by the sensor, the lights will be turned off.

Where should I install it?

Buildings with high energy usage, such as hotel locations, warehouses, and other commercial and industrial buildings are ideal spaces for occupancy sensors. No intense or extremely difficult programming is required. The sensors are designed to be compatible with standard lighting systems. Additionally, they are programmed to work with CFLs, LEDs, and new fixture/retrofit installations.

How much can I save?

In buildings with high energy usage, lighting accounts for up to 25% of all energy that is being used. The sensors have been tested by the manufacturers to ensure they not only perform at the highest quality, but will last for years. Installing the ceiling occupancy sensor and the high bay sensor saves not only energy and money, but also helps add to the overall lifetime of your lights, as they’ll no longer be in use when they don’t need to be. Installing sensors leads to automatically reduced energy consumption, energy costs, and your carbon footprint.

Sours: https://www.conservationmart.com/blog/index.php/ceiling-occupancy-sensor/

Top 10 Best Interior Motion Sensor Lights 2020

Top 10 Best Interior Motion Sensor Lights 2020

1Cloudy Bay Motion Sensor Ceiling Light, 120V CRI90 10W 5000K Bright Day Light,6.5 inch LED Flush Mount Round Lighting Fixture For Garage,Walk-in Closet,Attic,Pantry Wet location White FinishCloudy Bay Motion Sensor Ceiling Light, 120V CRI90 10W 5000K Bright Day Light,6.5 inch LED Flush... Check Price Now
2Lineway LED Flush Mount Ceiling Light Motion Sensor Round Ceiling Lamp for Hallway Stairway Garage Porch Kitchen Laundry Room (12 Inch, 18 W, 1200LM, 6000K)Lineway LED Flush Mount Ceiling Light Motion Sensor Round Ceiling Lamp for Hallway Stairway Garage... Check Price Now
3Stick-on Anywhere Portable Little Light Wireless LED Under Cabinet Lights 10-LED Motion Sensor Activated Night Light Build in Rechargeable Battery Magnetic Tap Lights for Closet, Cabinet (Silver2)Stick-on Anywhere Portable Little Light Wireless LED Under Cabinet Lights 10-LED Motion Sensor... Check Price Now
4Solar Shed Light Indoor Outdoor Solar Powered Motion Sensor Pandent Lights with 4 Lighting Modes and Remote Control 128LED 4 Deformed Heads Security lamp for Garage Gazebo BarnSolar Shed Light Indoor Outdoor Solar Powered Motion Sensor Pandent Lights with 4 Lighting Modes and... Check Price Now
5Facon LED Ceiling Dome Light with Switch and PIR Motion Sensor, RV Puck Light Under Cabinet Light, 12Volts Interior Light for RV Motorhomes Camper Caravan Trailer BoatFacon LED Ceiling Dome Light with Switch and PIR Motion Sensor, RV Puck Light Under Cabinet Light,... Check Price Now
6Wireless Motion Sensor Cabinet Lights 10-LED USB Rechargeable Closet Lights LED Under Cabinet Lighting for Wardrobe/Drawer/Stairs/Cupboard/Counter/Pantry/Stairs,Stick On Anywhere,2 Pack,White LightWireless Motion Sensor Cabinet Lights 10-LED USB Rechargeable Closet Lights LED Under Cabinet... Check Price Now
7GE, 3000K, Home Office, LED Night Light, Plug-in, Dusk to Dawn Sensor, Warm White, UL-Certified, Energy Efficient, Ideal for Bedroom, Bathroom, Nursery, Hallway, Kitchen, 30966, 2 pack, 2 CountGE, 3000K, Home Office, LED Night Light, Plug-in, Dusk to Dawn Sensor, Warm White, UL-Certified,... Check Price Now
8Kasa Smart Light Switch HS200, Single Pole, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch Works with Alexa and Google Home, UL Certified, No Hub Required , WhiteKasa Smart Light Switch HS200, Single Pole, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch Works with... Check Price Now
9MAZ-TEK Plug in Motion Sensor Lights with Adjustable Brightness,Warm White Motion Activated Led Night Light for Hallway, Stair, Corridor, Kitchen, Living Room, Garage, Basement, Utility Room,2 PackMAZ-TEK Plug in Motion Sensor Lights with Adjustable Brightness,Warm White Motion Activated Led... Check Price Now
10Motion Sensor Light Indoor, Hisoo 18W LED Flush Mount Ceiling Light Fixtures for Bathroom Bedroom Hallway Kitchen Basement 1600LM [150W Equiv] 3000K/4000K/6000K 9 inchMotion Sensor Light Indoor, Hisoo 18W LED Flush Mount Ceiling Light Fixtures for Bathroom Bedroom... Check Price Now

1. Cloudy Bay Motion Sensor Ceiling Light, 120V CRI90 10W 5000K Bright Day Light,6.5

  • 【sensitivity range】mild comes on when somebody is strolling by.as much as 120 levels and a distance of 14 toes.
  • 【straightforward installation】low profile design makes it straightforward to mount onto customary junction field or shallow pancake field.
  • 【movement activate】mild routinely comes on when movement detected in each day and night time time. mild turns off in 30 seconds when no movement detected.
  • 【power environment friendly 】etl licensed.makes use of solely 10w of power,equals to 60w incandescent bulb. it’s working with 120v ac(laborious wire), not battery or solor energy.
  • 【Three 12 months warranty】cloudy bay gives Three 12 months guarantee. contact us for a alternative if any product challenge arises.

2. Youtob Motion Sensor LED Ceiling Light 15W 1200LM Flush Mount Round Lighting Fixture

  • 【two modes available】 the daylight mode works within the day and the night time, and the night time sensor mode is not going to mild up in the course of the day. night time mode is extra appropriate for utilizing in out of doors. offers 1200lm snug brightness and 4000ok shade temperature to be sure to by no means stumble at the hours of darkness.
  • 【power saving】 equal to the brightness of a conventional 100 watt fluorescent tube, utilizing 15w led solely, prevent 85% electrical energy. lasting over 30,000 hours, don’t anxious about frequent lighting fixtures changing.
  • 【movement activation】youtob movement sensor mild will activate routinely while you come shut. prompts when movement is sensed inside 9-16 toes and routinely turns off 30 seconds after movement stops. splendid for hallways, closet rooms, stairways, basements and plenty of extra business or residential purposes. get your life extra handy!
  • 【simpler installation】 youtob hardwired led ceiling mild gives simpler set up and detailed set up information. with a bracket and all mounting included, merely get your mild able to go!
  • 【18 month warranty】 youtob present you top quality product and the most effective customer support. when you have any challenge with the led mild simply be at liberty to contact us!

3. AUVON Plug-in LED Motion Sensor Night Light, Mini Warm White LED Nightlight

  • Snug and adjustable lighting. chances are you’ll really feel relaxed and comfy while you see its heat lighting within the darkness. with the 2 brightness modes design, you can too select your required brightness from the excessive or medium for various events by merely urgent the spherical button on the high to provide the greatest expertise.
  • Protected to make use of. the plug in night time lights are with superior v-Zero hearth resistant casing and over-current safety design to ensure security.
  • Save power at house. in auto mode, if this plug in night time mild detects a motion within the darkness, it switches on routinely and lightens your means for a complete of 60 seconds after the final motion has been registered. then it turns off once more, making it doable to cut back pointless energy consumption when you don’t want them. in keeping with our calculation, utilizing auvo…
  • Three helpful modes. a easy swap on the high of the plug-in nightlight means that you can select amongst three lighting modes (on, off and auto). if the auto mode is chosen, its movement sensor will likely be activated to supply you a detection angle of 120 levels and a spread of Three-5 meters.
  • What you obtain: four* auvon plug-in nightlights, 1* person handbook, as much as 24 month guarantee and lifelong technical assist.

4. LED Motion Sensor Light Battery Operated, Closet Lights, Stick on Light for Closet

  • Led lights – set of 6 tremendous brilliant battery night time mild, highest price efficiency & power environment friendly
  • Straightforward set up – build-in magnet to steel floor or double-sided adhesive pad to stay anyplace
  • Movement sensor mild – auto on when movement activated in darkish & off after 20s of no movement sensing
  • Battery operated lights – powered by 3aaa batteries, cordless for closet, hallway, stair, any wall
  • Assure – 100% buyer satisfaction assured, free alternative or refund immediately

5. Yurnero 80 LED Motion Sensor Ceiling Light Battery Operated Ultra Bright Motion Activated

  • 【two modes available】there’s a swap close by the movement sensor, slide the swap to activate/shut off the photocell sensor. when it’s on, the sunshine will maintain off below daytime and solely may very well be motivated on at night time; when it’s off, the sunshine may very well be motivated on all day lengthy
  • 【tremendous brilliant hallway light】built-in 80 pcs brilliant & lengthy life-span smd2835 led. it diffuses effectively in all instructions with as much as 300 lumens brightness to be sure to by no means stumble at the hours of darkness, shield your lover and youngsters from darkness and concern across the house
  • 【movement sensor light】built-in pir infrared movement detector, this led ceiling mild immediately activates when it detects movement from as much as 18ft away below darkish ambient. and it turns off routinely after 20 seconds when no movement detected, conserving battery life
  • 【battery powered movement sensing light】powered by four * d-cell alkaline batteries( battery not included), it may mild up for 180spft space. the battery may present as much as 6 months of lighting with a mean use of 20 activations per day
  • 【straightforward to put in & huge application】wire no want, rapidly and simply set up it in lower than 5 minutes. suits on your bed room, rest room, stairs, hall, workshop, basement, storage entrances, roof, entryway. do not go away lights on needlessly operating up the electrical invoice anymore

6. Motion Sensor Light Bulbs, Aukora 12W (100-Watt Equivalent) E26 Motion Activated Dusk to

  • ➤pir movement sensor included: top quality pir infrared sensor is put in on the tip of bulb, so the movement sensor bulb will mild up routinely whereas it detects movement inside Eight-10 ft at the hours of darkness, and routinely off after the movement ceased or disappeared about 60 seconds. be aware: be sure that the sensor is pointing down inside correct distance and angle. to extend th…
  • ➤power saving and utilization event: these motion sensor mild solely mild up within the detective vary at night time or in darkish surroundings, energy-saving, surroundings defending and lengthy life, might be use in stairs, hallway, rest room, entrance door, storage room, storage, closet, balcony, gate and so forth. the upper you grasp the bulb, the bigger detection vary it achieves because the hello…
  • ➤specs: output energy: 12w(100-watt equal); enter voltage: ac85-265v; chilly white (6000-6500ok); luminous: 1000lm; lamp fashion:e26; working temperature: indoor use and out of doors use if exterior temperature is between 14°f(-10°c) and 95°f (35°c)
  • ➤built-in nightfall to daybreak sensor: this motion sensor mild bulb will routinely switches on at nightfall when the motion sensor is activated and off at daybreak.(activate beneath about 15lux and off about above 40lux) be aware: is not going to activate within the daytime even once they detect movement. and in the event you use it for the primary time in the course of the day, it’ll activate for 30 seconds and off wh…
  • ➤devoted customer support: 30 days a reimbursement assure and 12 months guarantee; 100% high-quality & pleasant service and 24-hours e mail response. you possibly can all the time come to us at no cost customer support at: https://www.amazon.com/sp_encoding=utf8&asin=&isamazonfulfilled=1&iscba=&marketplaceid=atvpdkikx0der&orderid=&vendor=a20bj42aj56fik&tab=&vasstoreid=

7. eufy Lumi Stick-On Night Light, Warm White LED, Motion Sensor, Stick-Anywhere, Closet Light

  • Computerized illumination: when mild sensor perceives darkness, movement sensor prompts lighting when motion is detected.
  • Nighttime navigation: eliminates have to activate blinding lights in the course of the night time.
  • Very best lighting: offers the correct quantity of glare-free lighting to information you at the hours of darkness.
  • Power environment friendly: three aaa batteries (not included) present delicate illumination for as much as a 12 months.
  • What you get: 3x lumi stick-on night time lights, 6x screw, 6x wall plugs, person handbook, pleased card, 18-month .

8. AMIR (Upgraded Version) Motion Sensor Lights, Battery-Powered LED Night Lights, Stick-Anywhere Closet Lights

  • Tremendous-bright led bulbs – as much as 20 lumen output, 6 pcs tremendous brilliant smd 2835 led; brilliant sufficient to be sure to by no means stumble at the hours of darkness
  • Straightforward set up – easy to put in, no hard-wiring. with double-sided adhesive pads and built-in magnet, you possibly can stick on anyplace you want
  • Battery operated – powered by 3pcs aaa batteries (not included) for coreless set up. to offer you illumination in areas which have restricted or no entry to electrical energy
  • Pir movement & mild sensor – auto-on inside 10 toes, auto-off after 15 seconds of no movement detected helps delay battery life. it’ll activate solely when it’s darkish and when movement is detected
  • Word: this mild can solely be turned on in darkness surroundings. it will not activate if the sunshine sensor has been detected by the sufficient mild. and please don’t set up this mild in excessive temperature place, in any other case, excessive temperatures will have an effect on the adhesive strip, after which the sunshine will slide simply!!

9. TOOWELL Motion Sensor Ceiling Light Battery Operated Wireless Motion Sensing Activated LED Light

  • Movement detector mild: built-in pir infrared movement detector with 120 diploma detection angle, this mild immediately activates when it detects movement from as much as 26 toes away. in addition to turns off routinely after 20 seconds of no movement, conserving battery life
  • Protected night time lights for household: built-in 17 pcs brilliant & lengthy life-span smd2835 led, it diffuses effectively in all instructions with as much as 180lm brightness to be sure to by no means stumble at the hours of darkness, shield your lover and youngsters from darkness and concern across the house
  • Power-saving led ceiling mild: for the sake of power saving, this movement sensing mild is built-in photocell sensor, it solely activates below darkish ambient when movement is detected
  • Battery operated movement sensor mild: powered by four x aa batteries(not included). it offers you greater than 35 hours of sunshine on one set of batteries
  • Straightforward to put in & huge utility: no wires want, set up in lower than 5 minutes. excellent for bed room, rest room, stairs, hall, workshop, basement, storage entrances, roof, entryway, closets, pantries, stairways, sheds, porches and storage rooms

10. First Alert PIR725 Motion Sensing Motion Activated Light Socket

  • Designed for indoor use solely and gives 360-degree movement detection inside a 12 ft radius
  • Screws into any current indoor mild socket
  • Three 12 months restricted guarantee
  • Merely set up in an current mild socket (indoor solely) after which screw bulb into the fixture
  • Works with incandescent bulbs as much as 100 watts
  • For indoor use solely and has sensitivity vary as much as 12 toes when put in in course of path most vulnerable to movement or foot visitors

Dinu das

Tech specialist. Social media guru. Evil problem solver. Total writer. Web enthusiast. Internet nerd. Passionate gamer. Twitter buff.

Sours: https://bestgamingpro.com/interior-motion-sensor-lights/
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All About Occupancy and Vacancy Sensors

Image courtesy of Leviton

Occupancy and vacancy sensors are devices that detect when a space is unoccupied and accordingly automatically turn OFF (or dim) the lights, thereby saving energy. The device may also turn the lights ON automatically upon detecting the presence of people, providing convenience and a potential security aid. According to the Lawrence Berkeley National Laboratory, occupancy-based strategies can produce average lighting energy savings of 24%.

Due to their relative simplicity and high energy-savings potential, coupled with energy code mandates, these sensors are a staple in new construction. They are also a common control feature in retrofit projects.

This article provides information that can be used to select an appropriate sensor technology and product features based on a given application’s characteristics. It is based on an updated Education Express course that will be posted shortly.

Image courtesy of Leviton



Image courtesy of Leviton

Occupancy sensors may be specified as manual-, partial- or full-ON devices.

The majority of commercial building energy codes require manual- or partial-ON operation. Manual-ON sensors (also called vacancy sensors) require the occupant to turn the lights ON using a manual switch, which may be integral to the sensor (shown here is an example). Partial-ON sensors activate the lights to a designated level such as 50%, and the occupant then uses a switch to bring the lights to full output. Full-ON sensors activate the lights at full output.

Manual- and partial-ON sensors tend to save more energy because the occupant may want to leave the lights OFF or at a lower level. Full-ON sensors provide convenience, which may be regarded as an amenity.


Occupancy and vacancy sensors may turn the lights OFF or reduce the lighting via stepped switching or dimming. While ON/OFF is more common, light reduction is well suited to applications where the lights must stay ON but are frequently unoccupied, such as this stairwell, or where the lamp does not start quickly, as in the case of HID lamps.

Image courtesy of LaMar Lighting

Coverage Area and Pattern

Image courtesy of Eaton

The sensor’s sensitivity defines at what distance it can detect major (i.e., body) and minor (i.e., hand) motion. The resulting coverage is expressed as coverage area and pattern. Coverage area defines the boundaries within which the sensor can detect motion. Coverage shape is the resulting shape of these boundaries, which may be a circle, rectangle, ellipse, tear drop, etc.

NEMA WD-7 offers testing and reporting methods for coverage areas and patterns, which compliant manufacturers report in their literature. This allows meaningful product comparison. The value is typically a maximum, which may be adjusted based on sensitivity setting, room dimensions, mounting height, presence of obstacles and other factors.

Shown here is a coverage pattern for a wall switch ultrasonic sensor.

Sensing Technology

The most common single-technology methods are passive infrared (PIR) and ultrasonic (US). Dual-technology (DT) sensors combine PIR with ultrasonic or acoustic sensing. Other methods include microwave sensors, which emit low-power microwaves and detect changes in occupancy, and camera-based sensors, which take multiple images of the coverage area per second. Researchers are now exploring even more ways to detect occupants, such as light-differential sensing.

Image courtesy of Wattstopper

Passive infrared

PIR sensors react to the movement of heat emitted by people in motion. They detect motion within a coverage area that requires a line of sight; they cannot “see” occupants behind obstacles or glass.

The detection mechanism is a multi-faceted lens that defines its coverage area as a series of discrete fan-shaped zones (see below example for a wall switch-mounted sensor, recommended for a maximum 15-ft. x 12-ft. area). The lens also determines the size of motion it is best suited to detect.

The sensor detects motion when an occupant crosses these zones, making it more sensitive to motion occurring lateral to the sensor. The gaps between the zones widen with distance, which results in sensitivity decreasing the farther the occupant is from the sensor. Most PIR sensors are sensitive to full body movement up to about 40 ft. but are sensitive to hand movement, which is more discrete, up to about 15 ft.

Image courtesy of Wattstopper


US sensors emit an ultrasonic high-frequency signal throughout a space, monitor the frequency of the reflected signal, and interpret change in frequency as motion. Alternately, they can set up a standing wave and look for changes in both amplitude and frequency due to motion. The frequency of the waves typically is well above (32-40 kHz) what the normal ear can detect (20 kHz) to avoid incompatibilities with devices such as hearing aids. These sensors do not require a direct line of sight (coverage is volumetric), making them ideal for applications such as public restrooms with multiple stalls.

Able to detect minor motion at a distance up to 25 ft., these sensors are highly sensitive. Shown here are coverage patterns for four US sensors suitable for different applications, including 180- to 360-degree coverage, and including different-sized rooms and a hallway.

Image courtesy of Wattstopper

Dual Technology

DT sensors utilize two detection methods to increase reliability in applications where a higher degree of detection is desirable (e.g., occupants are not moving for long periods of time), such as classrooms.

Most manufacturers offer sensors that combine ultrasonic and PIR technologies. The lights activate only when both technologies detect the presence of people. Only one technology is needed to hold the lights ON.

Another DT sensor combines PIR with acoustic detection, called passive DT because no waves emit into the space. The sensor’s microphone filters out white noise to focus on sharp variations characteristic of local occupant activity. Shown here are coverage patterns for a ceiling-mounted DT sensor (top) and a wall switch-mounted passive DT sensor (bottom).

Images courtesy of Wattstopper and Acuity Brands

Mounting Packages

Sensors may be configured for ceiling, high wall/corner, wall switch (wallbox), workstation and luminaire mounting.

Images courtesy of Hubbell and Cree

Power and Communication

Sensors may be low- or line-voltage or wireless.

Images courtesy of Leviton and Wattstopper

Special Features

Images courtesy of Leviton and Wattstopper

Images courtesy of Leviton and Wattstopper


Images courtesy of Leviton


Occupancy and vacancy sensors are ideally suited to installation in:

• smaller, enclosed spaces;
• larger spaces using zoned/networked or individual luminaire control;
• spaces that operate on an unpredictable schedule;
• spaces that are intermittently occupied—that is, left unoccupied for two or more hours per day; and
• stairwells, corridors and similar spaces where the lighting must remain ON all day but are frequently unoccupied (light reduction).

Ideal applications include offices, classrooms, copy rooms, restrooms, storage areas, conference rooms, warehouse aisles, break rooms, corridors, filing areas and other spaces.

Images courtesy of Wattstopper

Two examples are shown here, a public restroom (top) with a single sensor and an open office (bottom) with multiple networked sensors. In the restroom, a ceiling DT sensor is placed about 2 ft. out from the stall door to cover the space. In the open office, multiple ceiling US sensors are wired in parallel and networked to cover the entire space as a single load. Only one sensor is required to turn the lights ON and keep them ON. Note a minimum 20% overlap in coverage area is recommended to ensure reliability of detection.

Energy Codes

Most commercial building energy codes require lighting be turned OFF or reduced when it is not being used. These codes apply to new construction and renovation projects and, in some states, lamp-plus-ballast retrofits as well. The majority of codes now specifically require sensors in a wide range of spaces. Increasingly, codes mandate use of manual- or partial-ON sensors. The maximum time delay is trending from 30 to 20 minutes. See our Energy Codes course for information that may be applicable to your project.

PIR Sensors

PIR occupancy sensors sense the difference in heat between moving people and their background. They can be installed on ceilings or walls, including as a wall switch replacement, and used in both indoor and outdoor applications. They are well suited to:

• smaller, enclosed spaces such as private offices, utility closets and storage rooms;
• spaces requiring limited coverage such as warehouse aisles and corridors; and
• relatively confined outdoor spaces such as building perimeter lighting.

Image courtesy of Hubbell

PIR sensors should be located so that they have an unobstructed view of the primary task area. (While line-of-sight sensing can be limiting, it also enables the field of view to be limited at the factory by design or in the field through adjustment.) If full- or partial-ON, they should turn the lights ON immediately when an occupant enters the room.

These sensors are less sensitive than ultrasonic sensors; sensitivity decreases the farther away the occupant is from the sensor. They are most sensitive to motion lateral to the sensor. The coverage area should be limited so that only the lighting in the designated space is controlled.

Because PIR sensors respond to heat differential, such differential must exist. Additionally, to prevent false-ON switching (although the condition is rare in this case), they should not be mounted within 6-8 ft. of HVAC air diffusers and other heat sources.

Image courtesy of Hubbell

US Sensors

US sensors emit high-frequency sound waves into the space and detect occupancy from changes in the frequency of returning reflections, or they may set up a standing wave and measure both frequency shift and amplitude. They can be installed on ceilings or walls, including as a wall switch replacement, typically in indoor applications. Although they are an active technology (emit energy into the space), properly designed devices will not interfere with local devices such as hearing aids. They are well suited to applications requiring greater sensitivity and reliability, open indoor spaces, and spaces with obstacles. Suitable applications include open offices, private offices, bathrooms, classrooms and conference rooms.

Image courtesy of Hubbell

US sensors do not require a line of sight to the primary task area. They can “see” around corners and obstacles, and have volumetric coverage—that is, they monitor the entire space, not just what is within the field of view. However, the sensor’s field of view cannot be limited after installation.

Ultrasonic sensors should be located so that they lights turn ON as soon as a person enters the space. They are more sensitive than PIR sensors, ideal for applications with minor body motion such as typing in an office or test taking in a classroom. They are more sensitive to people walking directly to and from the sensor.

US sensor sensitivity may be decreased due to three factors: distance, partition height and the ability of room surfaces to reflect the ultrasonic emission. They best in spaces with ceilings below 14 ft. Room surfaces such as heavy carpeting and sound-absorbing partitions and ceiling tiles may reduce coverage of the sensor, while hard surfaces will increase sensitivity. Additionally, ceiling-mounted sensor effective range declines proportionally to partition height. In spaces with fabric partitions and high partition heights, direct line of sight may be required for reliable detection. Finally, because these sensors respond to motion, to avoid false-ON switching , they should not be mounted on sources of vibration or within 6-8 ft. or air sources such as open windows and ventilation apertures.

Image courtesy of Hubbell

DT Sensors

For spaces where line of sight to occupants is blocked by obstructions or where occupants are not moving for long periods of time, DT sensors can be effective. These sensors can be more effective at preventing false-OFF switching than PIR sensors, and preventing false-ON switching than US sensors.

Image courtesy of Hubbell


Image courtesy of Wattstopper

Improper mounting location is a leading cause of application problems with occupancy sensors, making sensor location a critical design decision. Sensors should be located so that they have the least possibility of nuisance switching and activate the lights as soon as a person enters the space. This typically involves sensor placement above or close to the main areas of activity in the space.

Another aspect of location is orientation. For example, the receiving side of US sensors should be positioned toward the area of greatest traffic in a space. Manufacturers can provide application support including project layout and sensor location services.

False Triggering

Designers must properly match sensors to applications to avoid issues such as false triggering, in which the sensor changes the lighting when it shouldn’t:

Time Delay

Time delay, which determines the amount of time before the lights turn OFF after detection of vacancy, is a significant adjustable sensor setting. Prevailing energy codes limit the time delay to 30 minutes, thought the latest energy codes are shortening this to 20 minutes.

Fluorescent lamps experience wear and tear on startup, so as the operating cycle decreases (hours per start), energy savings increase but lamp life decreases, particularly for instant-start systems. This may be mitigated by using long-life lamps and programmed rapid-start ballasts.

In contrast, frequency of starting imposes a negligible effect on LED product life. This theoretically allows time delays as short as 1-5 minutes, which can increase energy savings, though more sensors may be needed to avoid the potential for false OFF. Additionally, intelligent lighting control systems allow programming of time delay so that it changes based on time of day. For example, during the day, time delay might be 20 minutes. Afterhours, 5.

Filed Under: Articles, Occupancy Sensors

Sours: https://lightingcontrolsassociation.org/2017/08/21/all-about-occupancy-and-vacancy-sensors/

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Madison 3497/28 Ceiling lamp White, LED 1x24W 3000K/4000K/6500K 1989lm, IP54 CL.II, Integrated LED, Dimmable Kelvin, Motion Sensor


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Sensor ceiling light

[hclxing] eagerly picked up an LED ceiling light for its ability to be turned on and off remotely, but it turns out that the lamp has quite a few other features. These include adjustable brightness, color temperature, automatic turnoff, light sensing, motion sensing, and more. Before installing, [hclxing] decided to tear it down to see what was involved in bringing all those features to bear, but after opening the lamp there wasn’t much to see. Surprisingly, besides a PCB laden with LEDs, there were exactly two components inside the unit: an AC power adapter and a small white controller unit. That’s it.

The power adapter is straightforward in that it accepts 100-240 Volts AC and turns it into 30-40 Volts DC for the LEDs, and it appears to provide 5 V for the controller as well. But [hclxing] noticed that the small white controller unit — the only other component besides the LEDs — had an FCC ID on it. A quick bit of online sleuthing revealed that ID is attached to a microwave sensor module. Most of us would probably expect to see a PIR sensor, but this light is motion sensing with microwaves. We have seen such units tested in the past, which links to a video [hclxing] also references.

The microwave motion sensor board is shown here, and underneath it is a dense PCB that controls all other functions. Once [hclxing] identified the wires and their signals, it was off to Costco to buy more because the device looks eminently hackable. We’re sure [hclxing] can do it, given their past history with reverse-engineering WyzeSense hardware.

Sours: https://hackaday.com/2020/03/30/teardown-of-costco-ceiling-light-reveals-microwave-motion-sensor-and-hackable-design/
install and review motion sensor ceiling LED light

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