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Blackt Electrotech BT31C : PIR Motion Sensor Ceiling Mounted White Round Shape (2-Year Warranty)

4.0 4.0 out of 5 stars 2,984 ratings
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Brand Blackt Electrotech
Colour White
Power Source Electrical
Item Weight 160 Grams
Maximum Range 7 metres

About this item

  • 🌟 [Customizable Settings]: Adjust detection distance (0–7m), angle (360°), and off delay (10 seconds to 7 minutes) for flexible and tailored motion detection.
  • 💡 [Versatile Compatibility]: Supports various appliances, LEDs, including incandescent lamps, fluorescent lights, spotlights, and transformers.
  • 🔋 [Energy-Efficient Design]: Utilizes infrared technology to activate lights only when motion is detected, with photosensitive control to prevent activation in daylight.
  • 🔧 [Adjustable Ambient Sensitivity]: Customize light sensitivity from 3 to 2000 lux for optimal performance in different lighting environments.
  • 🛠️ [Easy Installation]: Simple to set up and adjust, ideal for homes, offices, and commercial spaces.
  • 🛡️ [ Warranty]: Backed by a comprehensive 2-year warranty, ensuring durability and peace of mind.
› See more product details
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Blackt Electrotech BT31C : PIR Motion Sensor Ceiling Mounted White Round Shape (2-Year Warranty)
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Blackt Electrotech BT31C : PIR Motion Sensor Ceiling Mounted White Round Shape (2-Year Warranty)

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Blackt Electrotech

85% positive ratings from 10K+ customers

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9+ years on Amazon

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Product Description

The product is new energy saving device, it adopts good sensitivity detector, integrated kit. It gathers automatism, convenience, safety, saving energy & physical functions. It works by receiving human motion infrared rays.

  • Now switch on/off your lights, bulb, cfl,
  • Automatic
  • Use infrared pir motion sensor


360 Degree PIR Motion Sensor With Light Sensor (Ceiling Mounted)

​Quality control standard:

  • Operating volt: ac 220-250v 50hz-60hz.
  • Load power: upto 300/1200w max
  • Ambient light: 3-2000 (adjuestable)
  • Load type: incandescent lamp, led light, clf, fans,
  • Detecting distance: 0~7m
  • Detecting angle: 360 degree.
  • Installtion hight: 2.2-4 mtr
  • Motion detetion speed: 0.6~1m/s
  • Power cusumption:0.1w (static) & 0.4(work)
  • Working humidity: less than 93%rh
  • Delay: 10 seconds -7 minutes (adjustable)

​Product installation:

  • Keep sensor unit 1.6 mtr higher from the ground level.
  • The light, such as incandescent lamp which emits high heat should be kept from the switch aways, or it will be turn on/off voluntarily.
  • On being fixed to the wire first time, the switch' initialization will take 1-2 minutes. It's natural for the switch to turn on/off voluntarily.
  • When you install the switch on daytime, the default state of the switch will make the light off.Keep the detector of the switch from illumination, & then the light will turn on. The darker, the switch will be more sensitive. If it is not very sensitive, turn the yellow port counterclockwise with a long and thin tool to get a proper light sensitivity.

Key Features:

Good solution for energy saving & easy in installation. and
Delay adjustment: 10 seconds - 7 minutes & adjustable lux: turn on the lights during the day or night.

Using the automatic control product of infrared technology,when people walk into the sensor range,and the sensor can detect the spectral change of the human body infrared ray,during this time,the switch will connect the load automatically until the person leaves the sensor range. 2, through the photosensitive control , it will not turn on the lights in the daytime or light environment, but also can be adjusted in any lighting environment sensing lights .

Sensitivity adjustable: turn on lights during day or nights.
It can use with lamps, incandescent lamps (bulbs), old-fashioned fluorescent lamps, electronic fluorescent ring lamps, spotlights, transformers, small electrical appliances, and other all other appliance.

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Blackt Electrotech BT31C : PIR Motion Sensor Ceiling Mounted White Round Shape (2-Year Warranty)
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Price-30% ₹559.00
M.R.P: ₹800.00		-71% ₹672.00
M.R.P: ₹2,349.00		-38% ₹1,296.00
M.R.P: ₹2,099.00		-37% ₹945.00
M.R.P: ₹1,500.00		-49% ₹349.00
M.R.P: ₹690.00		-25% ₹599.00
M.R.P: ₹800.00
Delivery
Get it by Sunday, March 16
Get it by Monday, March 17
Get it by Sunday, March 16
Get it by Sunday, March 16
—
Get it by Sunday, March 16
Customer Ratings
4.04.0 out of 5 stars2,984
3.93.9 out of 5 stars77
4.34.3 out of 5 stars1,044
3.73.7 out of 5 stars18
4.44.4 out of 5 stars296
3.83.8 out of 5 stars248
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Customer reviews

4 out of 5 stars
2,984 global ratings

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Customers say

Customers find the motion detector device useful and effective. It offers good value for the price, with clear installation instructions. They appreciate its energy-saving features. However, some customers are dissatisfied with its durability. Opinions vary on the motion sensor, switch off, and time delay.

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FunctionalityValue for moneyEase of installationEnergy savingMotion sensorSwitch offTime delayDurability
584 customers mention "Functionality"431 positive153 negative

Customers like the motion detector device's functionality. They say it works well on ceilings, detects motion, and lights come on when triggered. The quality is good, and installation is easy.

"It is a really awesome product. I bought it and installed it in our building loby area and it is works absolutely fantastic...." Read more

"Excellent product" Read more

"Easy to install Very effective and useful." Read more

"The product doesn’t work. Bought 4 of them out of which 2 doesn’t work" Read more

72 customers mention "Value for money"54 positive18 negative

Customers appreciate the value for money of the motion detector. They find it great for its price and satisfied with its performance at this price.

"...Nice product. Value for money . Auto switch on and off and motion sensor is perfect...." Read more

"...Well worth it! I’m satisfied!" Read more

"...This cost effective product will save you on the power bill over time and you'll seep the return of investment soon!" Read more

"All my money got wasted...." Read more

71 customers mention "Ease of installation"62 positive9 negative

Customers find the motion detector device easy to install. The wiring instructions are clear, and it makes work easier. They recommend it for its simplicity and robustness.

"Easy to install Very effective and useful." Read more

"...Quality is good and sensor work fine. Installation is easy. Now my kitchen become smart." Read more

"Just installed working fine" Read more

"This is very easy to install and sine some days now and it has been working as expected." Read more

23 customers mention "Energy saving"23 positive0 negative

Customers appreciate the motion detector's energy savings. They find it useful for saving electricity in kitchens, bathrooms, and outdoor lights.

"...Not only do you save light and energy when you are not in the room, it also decreases the light when you are not in movement so you save more...." Read more

"Energy saving and safe entrance when switched on automatically." Read more

"...Will help to save a lot of electricity. Added advantage is to avoid light attracted bugs and insects in summers." Read more

"Value for money, save electricity save nature" Read more

142 customers mention "Motion sensor"80 positive62 negative

Customers have different experiences with the motion sensor. Some find it effective and say it turns on the light as they enter the kitchen. Others report issues with the sensor not working properly, taking longer to sense motion, or not sensing a moving human.

"...Motion detection is perfect. The option of time setting for morning and night motion detection are there but if you keep that knob in the center..." Read more

"Ok .. sometimes sensor takes little longer to sense the motion . Otherwise good product" Read more

"...Our LED strips connected to this turn on in a flash the moment it senses movement. Nice product. Value for money ...." Read more

"Good sensor, work perfectly, I have used in my Car Shed, it's working perfectly. Range is good." Read more

42 customers mention "Switch off"22 positive20 negative

Customers have mixed opinions about the motion detector device. Some find it works well and turns off automatically after a set time, while others report that it turns off for a second and then opens again even when there is no one around.

"...Nice product. Value for money . Auto switch on and off and motion sensor is perfect...." Read more

"...With me it keeps the light on without any motion. The lights is switched off for a second and then opens again even if there is no one...." Read more

"...As the light automatically goes off as per the timer settings, one does not have to remember to it switch off ...." Read more

"...It's suppose to stay lighted untill someone is present but it turns off as per the timer" Read more

23 customers mention "Time delay"13 positive10 negative

Customers have different views on the time delay of the motion detector device. Some find it very fast, with a light turning on in less than a second after movement. Others mention a little delay, say about 1-2 seconds, when someone is behind a wall.

"...I have set the light to go off at the minimum setting and it goes off in 10 secs...." Read more

"This is a must buy product. The only drawback is that it takes 2 seconds to activate." Read more

"...it's really easy to install and performance is really good." Read more

"...Response time is also getting slower as it ages. The device is bulky and the manufacturer should improve the overall design asthetics." Read more

19 customers mention "Durability"0 positive19 negative

Customers are unhappy with the product's durability. They mention it doesn't last a year, has a very low work-life of about a month, and becomes useless within 10 days from the day of installation. Some say it conked out in about 3 months. The quality is not great and the performance declines over time.

"...purchase this product multiple times and to my experience the product is engineered in a such a way that it gets fault a few days after the warranty..." Read more

"Not good i have purchased 4 time all sensors not work they are cheep quality" Read more

"...Among them one gone dead after one and half year. Two are running fine till now...." Read more

"Not grate quality but it serves the purpose, Looks like made in chaina product and rebranded here" Read more

Awesome motion detection sensor
5 out of 5 stars
Awesome motion detection sensor
It is a really awesome product. I bought it and installed it in our building loby area and it is works absolutely fantastic. Motion detection is perfect. The option of time setting for morning and night motion detection are there but if you keep that knob in the center the light would start glowing once it is evening. Loved this product
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Top reviews from India

  • Amazon Customer
    5.0 out of 5 stars Awesome motion detection sensor
    Reviewed in India on 25 February 2025
    Verified Purchase
    It is a really awesome product. I bought it and installed it in our building loby area and it is works absolutely fantastic. Motion detection is perfect. The option of time setting for morning and night motion detection are there but if you keep that knob in the center the light would start glowing once it is evening. Loved this product
    Customer image
    Amazon Customer
    5.0 out of 5 stars
    Awesome motion detection sensor

    Reviewed in India on 25 February 2025
    It is a really awesome product. I bought it and installed it in our building loby area and it is works absolutely fantastic. Motion detection is perfect. The option of time setting for morning and night motion detection are there but if you keep that knob in the center the light would start glowing once it is evening. Loved this product
    Images in this review
    Customer image
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  • Mohammad Sharif Shaikh Munaf
    4.0 out of 5 stars Best Product
    Reviewed in India on 10 January 2025
    Verified Purchase
    Best
    One person found this helpful
    Helpful
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  • SK ASGAR ALI
    5.0 out of 5 stars Excellent
    Reviewed in India on 16 February 2025
    Verified Purchase
    Excellent product
    Helpful
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  • Amazon Customer
    5.0 out of 5 stars Very useful
    Reviewed in India on 3 January 2025
    Verified Purchase
    Easy to install
    Very effective and useful.
    Helpful
     Report
  • The product doesn’t work. Bought 4 pieces out of which 2 doesn’t work.
    1.0 out of 5 stars Doesn’t work properly
    Reviewed in India on 6 November 2024
    Verified Purchase
    The product doesn’t work. Bought 4 of them out of which 2 doesn’t work
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  • Sam
    3.0 out of 5 stars works well but for around a year or so. Warranty is useless.
    Reviewed in India on 25 October 2024
    Verified Purchase
    I have purchased 10s of these devices for my house. The sensor works well for about a year or so and then stop working. With me it keeps the light on without any motion. The lights is switched off for a second and then opens again even if there is no one. I have replaced the sensor almost 3 times. Warranty is for 2 years, but when i contacted the company they asked me to record a video of fault and then courier the device to them and then they will check and send a replacement after a month. The courier cost was more than 200 and I found it to be more of a hassle than to buy a new one.
    One person found this helpful
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  • murtaza
    5.0 out of 5 stars Sensor is working fine.
    Reviewed in India on 8 July 2024
    Verified Purchase
    I am reviewing this after almost one month of usage. Even though I mounted the device vertically its object capture angle is very good. Our LED strips connected to this turn on in a flash the moment it senses movement. Nice product. Value for money . Auto switch on and off and motion sensor is perfect. Also there is a mode to select that the auto switch will work only when it's dark. So when it's bright and sunny the auto switch will be in sleep mode .
    Customer image
    murtaza
    5.0 out of 5 stars
    Sensor is working fine.

    Reviewed in India on 8 July 2024
    I am reviewing this after almost one month of usage. Even though I mounted the device vertically its object capture angle is very good. Our LED strips connected to this turn on in a flash the moment it senses movement. Nice product. Value for money . Auto switch on and off and motion sensor is perfect. Also there is a mode to select that the auto switch will work only when it's dark. So when it's bright and sunny the auto switch will be in sleep mode .
    Images in this review
    Customer image
    2 people found this helpful
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  • Decent purchase.. first impreasion have to see long term use experience
    4.0 out of 5 stars Good product .. makes your house like a magic house for those who dont know about automation😁😁
    Reviewed in India on 24 July 2024
    Verified Purchase
    Ok .. sometimes sensor takes little longer to sense the motion . Otherwise good product
    Helpful
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