SKU: 49395378060

Kidde Sentry 4x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit Mains Powered with 9V Alkaline Battery Back-Up c/w Quick Fit Base

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Description

Kidde Sentry 4x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit Mains Powered with 9V Alkaline Battery Back-Up c/w Quick Fit BaseKidde Sentry 4x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit with 9V Battery Back Up The Kidde Sentry Alarm Kit includes four KF21 Optical Smoke Alarms and one KF31 Heat Alarm, providing a complete mains powered fire detection solution for larger residential properties. Designed to deliver reliable smoke and heat detection throughout the home, each alarm features a 9V alkaline battery back up and can be interconnected with up to 23 compatible Kidde

Kidde Sentry 4x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit with 9V Battery Back-Up

The Kidde Sentry Alarm Kit includes four KF21 Optical Smoke Alarms and one KF31 Heat Alarm, providing a complete mains-powered fire detection solution for larger residential properties. Designed to deliver reliable smoke and heat detection throughout the home, each alarm features a 9V alkaline battery back-up and can be interconnected with up to 23 compatible Kidde FIREX alarms.

This interlinked alarm system ensures that when one alarm detects danger, all connected alarms sound simultaneously, helping to provide earlier warning and improved occupant safety across multiple rooms and floors.

Each alarm is supplied with Kidde’s Quick-Fit Slide-On Base for faster installation and includes integrated cable management to maintain neat, secure wiring. The 150mm flared base plate also provides a clean retrofit finish when replacing existing alarms.

Kit Contents

  • 4 x Kidde KF21 Optical Smoke Alarms
  • 1 x Kidde KF31 Heat Alarm

KF21 Optical Smoke Alarm Features

The Kidde KF21 optical smoke alarm is ideal for detecting slow, smouldering fires caused by electrical faults, furniture or cigarettes. Suitable for escape routes and living spaces, the optical sensor provides dependable early warning protection.

  • Mains-powered optical smoke alarm with 9V alkaline battery back-up
  • Optical sensor with dust compensation and bug screen
  • Interconnects with up to 23 Kidde FIREX alarms
  • Alarm memory identifies the activated alarm
  • Combined Test/Hush button
  • Auto reset after activation
  • Tamper-resistant locking mechanism
  • Suitable for hallways, bedrooms, lofts and living areas
  • BSI certified to BS EN14604:2005
  • 10-year warranty

KF31 Heat Alarm Features

The Kidde KF31 heat alarm is designed for kitchens, garages and loft spaces where smoke alarms may be unsuitable due to steam, dust or cooking fumes. Its thermistor heat sensor provides reliable temperature detection while helping reduce nuisance alarms.

  • Mains-powered heat alarm with 9V alkaline battery back-up
  • Thermistor heat sensor for dependable heat detection
  • Interconnects with up to 23 Kidde FIREX alarms
  • Alarm memory identifies the activated alarm
  • Combined Test/Hush button
  • Auto reset after activation
  • Tamper-resistant locking mechanism
  • Ideal for kitchens, garages and loft spaces
  • BSI certified to BS 5446 Part 2:2003
  • 10-year warranty

Key Benefits

  • Complete smoke and heat alarm solution for larger homes
  • Interlinked alarms provide whole-home warning when danger is detected
  • Quick-Fit bases for fast and efficient installation
  • Integrated cable management for tidy wiring
  • Suitable for compliance with UK Building Regulations
  • Grade D domestic fire alarm system solution
  • Fully compatible with Kidde FIREX smoke, heat and CO alarms

Technical Specifications

KF21 Optical Smoke Alarm

  • Model: KF21
  • Power Supply: 230V mains with 9V alkaline battery back-up
  • Sensor Type: Optical
  • Alarm Volume: 85dB minimum at 3 metres
  • Dimensions: 150mm x 53mm
  • Weight: 295g
  • Operating Temperature: -10°C to +40°C
  • Warranty: 10 Years

KF31 Heat Alarm

  • Model: KF31
  • Power Supply: 230V mains with 9V alkaline battery back-up
  • Sensor Type: Thermistor heat sensor
  • Alarm Volume: 85dB minimum at 3 metres
  • Dimensions: 150mm x 150mm x 66mm
  • Weight: 281g
  • Operating Temperature: -10°C to +40°C
  • Warranty: 10 Years

Please Note: Alarms are supplied individually within the kit. Installation should be completed by a qualified electrician.

Downloads

KF21 Data Sheet:
Download KF21 Data Sheet

KF31 Data Sheet:
Download KF31 Data Sheet

KF21 Instruction Manual:
Download KF21 Instruction Manual

KF31 Instruction Manual:
Download KF31 Instruction Manual

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 49395378060

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4.6 ★★★★★
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Product Reviews
A
Verified Purchase
Asia
San Leandro, US
★★★★★ 5
Absolutely amazing! Must try.
I absolutely love this sponge!, it is so dense; it uses such a small amount of makeup but applies like a full coverage. I am using much less of my mineral makeup powder thanks to this sponge; plus it is easy to wash and dries quickly. Totally worth a try!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2024
F
Verified Purchase
35 F glitter loving unicorn
Houston, US
★★★★★ 4
*update* Maybe(?) Perfect for those who hate eggs
Edit: Update It is with a heavy heart Im updating this review. When I said this sponge stains, I mean it really stains. Now to be fair it is marketed as a powder sponge and I use it with liquid so this my be entirely on the user (aka me) but it's like I can never get it clean. Between my repeated washing and the overall product build up the performance of this sponge went downhill quickly. The finish of my makeup suffered and the flocking took a beating. For what it's worth the sponge has not fallen apart and is still in one piece. But I get more of a 4 star finish than a 5 star finish. I've ended up using a large fluffy brush to buff out my foundation to get the desired result. I also ended up repurchasing the flocked flat ended egg from RT to replace this although at the moment I am still stubbornly using this sponge (and also avoiding doing my makeup) I do believe a lot of my issues are do to using this sponge with liquid foundation instead of power and that is on me. I'm finding it so very difficult to clean and the RT flocked egg cleans up so much easier. I don't hate this sponge but my lovefest has definitely taken a turn to more of a likefest. I am going to keep using (because I am stubborn like that) and see how long it takes to turn this relationship into a hatefest or fall apart completely, whichever happens first. I will most likely update again at that time. At this moment I am changing my review from 5 star to 4 star. I will be keeping my original review below. *original review* Yo I LOVE this thing. Ok here's the deal, I don't like the beauty blender, in fact I kinda hate it. Yea, I said it, I'm not on board with bouncing an egg all over my face, I think it's tedious and inefficient. I had at one time a flat teardrop shaped sponge that was my hands down favorite application tool for foundation. I used that thing until it literally fell apart. I tried to find a replacement but the store I had originally gotten it from no longer carried it so I kept using that ratty old sponge until it was missing chunks. I tried some other flat sponges but none worked as I wanted so I went back to brushes but I really hate cleaning foundation from brushes so I was pretty much hating my life. Then I found a flocked egg. Now I'm not a fan of the eggs but I was intrigued by the flocked texture and it had a nice flat edge so I tried it and it was almost as good as my old dearly missed flat teardrop sponge. I still was not a fan of bouncing an egg around on my face but I used this until the flocking wore off (about 6 months) Well, I saw this listing for a flat flocked sponge and I pounced on it. I am so incredibly deliriously happy with this little sponge. I love that it's flat and not an egg. I love the flocking. I love how it fits in my hand. I love love the finish I get with my foundation. I love it. Like I need to order a dozen more so I never run out and I'm trying to break my hoarding tendencies but for this tool I want to hoard. So the bad... It does stain easily. I wet my sponge before use and give it a quick clean after use. My old flocked egg would clean right up but this has stained on the first use. I also don't know how long this will hold up so I hope to update at a later time about that. Overall I couldn't be happier with this sponge.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 10, 2021
K
Verified Purchase
Kristyne
Carnegie, US
★★★★★ 5
Perfect for liquid
This sponge is not made for liquid but I use it for my liquid foundation. The sponge won't last as long when it gets wet but it still lasts a LONG time! I put a drop of water on sponge first then dab a few times on my arm to dry with only a slight hint of moisture left (very dry feeling)... then add a drop of makeup (literally). The coverage is awesome and your makeup last 2 to 3x as long. Flawless finish. Love it! I recently updated my review...I still have same awesome sponge. Now I also mix a silicone air brush liquid (clear) to the liquid makeup it spreads farther and the finish is wonderful. Great product stays dry and drys very quick after use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2014
D
Verified Purchase
Doris
San Leandro, US
★★★★★ 5
Love this product!
I’ve used this product for a long time. It’s nice and soft and works well on my skin. I wouldn’t use anything else.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 29, 2024
K
Verified Purchase
kjm27434
Boise, US
★★★★★ 3
Its OK, but not nearly as easy to use as videos and reviews make it seem.
I ordered this flocked sponge based on reviews and on watching JI videos of applying pure pressed powder with it. I tried it 'damp' and it was awful mess! I tried it dry, and no powder was transferring to my face at all. I'll stick with my ELF blurring brush to apply JI pressed foundation (which I love).
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 12, 2018

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