SILENTKNIGHT
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SILENT KNIGHT D4120W 4-Wire Conv Photo Duct Motion Sensor, White, Wall Mount, 3.1 lbs
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SILENT KNIGHT D4120W 4-Wire Conv Photo Duct Motion Sensor, White, Wall Mount, 3.1 lbs
SILENT KNIGHT D4120W 4-Wire Conv Photo Duct Motion Sensor, White, Wall Mount, 3.1 lbs
Item #: 71616264

SILENT KNIGHT D4120W 4-Wire Conv Photo Duct Motion Sensor, White, Wall Mount, 3.1 lbs

Item #: 71616264

KWD 104

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Order now and get it around Sunday, August 02
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What Stands Out

High Sensitivity
Equipped with advanced photoelectric technology, the Silent Knight D4120W ensures precise motion detection, enhancing safety and security in various environments.
Versatile Mounting
Designed for wall mounting, this sensor fits seamlessly into multiple settings, offering flexibility for installation in residential or commercial spaces.
Reliable Performance
With a lightweight design and durable build, the D4120W promises consistent performance and longevity, providing great value for those seeking dependable motion detection solutions.

Product Details

Discover a wide range of System Sensor D4120W products at Ubuy Kuwait. Browse and buy from our selection of System Sensor D4120W detectors online.
  • Innovaairflex 4-wire conventional photoelectric duct smoke detector
  • Includes 2D51 detector for reliable smoke detection
  • Designed for use in watertight applications
  • Easy to install and maintain
  • Compatible with system sensor's duct housing for added protection
  • Ideal for various industrial and commercial settings
Power SourceCorded Electric
Mounting TypeWall Mount
Battery Descriptionbattery not included
Temperature Range32 Degrees Fahrenheit
Compatible DevicesIndustrial Control Systems, Other Industrial Devices
Operating Temperature32 Degrees Fahrenheit
Antenna LocationDriveway, Garage, Garden, Terrace
Item Weight3.1 Pounds (1.41 kg)
Colorgray
BrandSILENT KNIGHT
ManufacturerAHST
UPC808237771966
Mfr Part NumberD4120W
Model NumberD4120W
Unit Count1.0 Count

Who Should Buy?

Suitable For
  • Smoke Detection

    Ideal for facilities needing smoke detection in duct systems, ensuring early warning in HVAC environments.

  • Commercial Buildings

    Perfect for large commercial spaces where motion detection can enhance safety and security measures effectively.

  • Electrical Maintenance

    Recommended for electricians needing reliable sensors for installation in fire alarm and safety systems.

Not Suitable For
  • Residential Use

    Not suitable for typical home use as it's designed for industrial and commercial applications.

Product Description

SILENT KNIGHT D4120W 4-Wire Conv Photo Duct Motion Sensor, White, Wall Mount, 3.1 lbs

Have any Query? Chat with us

Customer Questions & Answers

  • Question: What are the key features of the System Sensor D4120W?

    Answer: The System Sensor D4120W is equipped with advanced photoelectric sensing technology and a multi-color LED indicator for enhanced visibility. This smoke detector also includes a built-in sounder that emits loud alerts to ensure you can detect smoke quickly. Its design allows for easy integration with existing fire alarm systems, making it versatile for various applications. For instance, it's ideal for both residential and commercial environments where fast response to smoke detection is critical.
  • Question: How does the System Sensor D4120W detect smoke?

    Answer: The System Sensor D4120W uses photoelectric sensing technology, which identifies smoke particles by detecting light refracted by them. This method is especially effective in recognizing smoldering fires, providing earlier alerts compared to traditional ionization detectors. Its quick detection capabilities make it essential for areas where fires could develop unnoticed, such as attics or storage spaces where the potential for smoke buildup exists.
  • Question: Can the System Sensor D4120W be interconnected with other alarms?

    Answer: Yes, the System Sensor D4120W can be interconnected with compatible fire alarm systems. This allows multiple alarms to communicate with each other, ensuring that if one unit detects smoke, all interconnected units will activate. Interconnecting alarms enhances safety in larger areas or multi-level buildings, providing comprehensive coverage so that alerts are centralized throughout the premises.
  • Question: Is the System Sensor D4120W suitable for commercial use?

    Answer: Absolutely! The System Sensor D4120W is designed for both residential and commercial applications. Its robust performance and ability to connect with larger fire alarm systems make it an excellent choice for businesses, schools, and healthcare facilities. By using this smoke detector, organizations can ensure compliance with safety regulations while maintaining a safe environment for employees and visitors alike.
  • Question: What maintenance does the System Sensor D4120W require?

    Answer: Maintaining the System Sensor D4120W involves regular testing to ensure functionality. It is recommended to test the alarm at least once a month and replace the unit as needed according to local regulations. Additionally, keeping the unit clean and dust-free enhances detection capabilities and longevity. Regular maintenance helps ensure that you remain protected and reduces the risk of malfunctions.
  • Question: What is the recommended installation location for the System Sensor D4120W?

    Answer: For optimal performance, the System Sensor D4120W should be installed on ceilings or high walls, ideally at least 10 feet away from any cooking appliances to reduce false alarms. It’s best positioned in hallways that lead to bedrooms or in common areas where its alerts can be heard easily. These placements ensure maximum coverage, helping detect potential smoke quickly and effectively.
  • Question: Does the System Sensor D4120W have a privacy feature?

    Answer: The System Sensor D4120W does not feature a privacy mode, but it is designed to minimize false alarms. Its advanced sensing technology helps differentiate between smoke from actual fires and harmless vapors from cooking or steam. By reducing false alarms, the detector provides reliable monitoring without requiring a privacy feature. This allows homeowners and businesses to stay protected without frequent nuisance alerts.
  • Question: What sounds does the System Sensor D4120W make during an alert?

    Answer: The System Sensor D4120W emits a loud, distinct sound during an alert to ensure it captures attention effectively. The sound is designed to be piercing and noticeable, making it hard to overlook. This high-volume sound is essential in waking occupants during a night-time fire emergency or drawing attention in busy commercial settings, ensuring that swift action can be taken.
  • Question: How does the System Sensor D4120W perform in various environmental conditions?

    Answer: The System Sensor D4120W is engineered to perform reliably in diverse environmental conditions. Its photoelectric sensing technology is effective in detecting smoke in varying temperatures and humidity levels, ensuring it remains functional even in challenging climates. This capability makes it suitable for installation in both residential homes and commercial buildings located in regions with fluctuating weather patterns.
  • Question: Where can I buy the System Sensor D4120W in Kuwait?

    Answer: You can purchase the System Sensor D4120W through Ubuy, a trusted online platform that offers a wide range of products including fire safety equipment. Ubuy provides a user-friendly shopping experience and reliable service, making it easy for you to acquire the safety devices you need for your home or business.

SILENTKNIGHT Motion Detectors D4120W Editorial Review

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Ahmad
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“Fast delivery, great experience overall.”

03-Jul-26 · via Trustpilot
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abbas
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“Excellent item received as expected and before the estimated time. Thanks for the great service.”

19-Jul-26 · via Trustpilot
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Waleed
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“Thank you for your message. I received the product and it is very good ? I?m really impressed with how great it works! I will be happy to share my feedback on the website.”

11 February 2026 · via Trustpilot
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Ahmed
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“Very good the same exact product that i wanted good shipping and delivery”

10 June 2026 · via Trustpilot
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Ambhita
Verified buyer

“Package delivered on time”

10 July 2026 · via Trustpilot
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  • Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
  • Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

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