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Description
Kidde Sentry 1x KF21R Optical Smoke & 1x KF31R Heat Alarm Kit Mains Powered with Sealed-In Rechargeable Battery Back-Up c/w Quick Fit BaseKidde Sentry KF21R & KF31R Mains Powered Smoke and Heat Alarm Kit with Rechargeable Lithium Battery Back Up The Kidde Sentry Alarm Kit combines the KF21R Optical Smoke Alarm and KF31R Heat Alarm to provide reliable, whole home fire detection for residential properties. Designed for mains powered installation, both alarms feature sealed rechargeable lithium battery back up protection and can be interconnected with up to 23 compatible Kidde FIREX
Kidde Sentry KF21R & KF31R Mains Powered Smoke and Heat Alarm Kit with Rechargeable Lithium Battery Back-Up
The Kidde Sentry Alarm Kit combines the KF21R Optical Smoke Alarm and KF31R Heat Alarm to provide reliable, whole-home fire detection for residential properties. Designed for mains-powered installation, both alarms feature sealed rechargeable lithium battery back-up protection and can be interconnected with up to 23 compatible Kidde FIREX alarms.
This advanced fire alarm kit delivers dependable smoke and heat detection across living spaces, escape routes, kitchens, garages and lofts, helping homeowners meet UK Building Regulations while improving property safety.
Each alarm is supplied with Kidde’s Quick-Fit Slide-On Base for faster installation and features integrated cable management to keep wiring secure and organised. The 150mm flared base plate also provides a neat finish when retrofitting existing alarms.
Kit Contents
- 1 x Kidde KF21R Optical Smoke Alarm
- 1 x Kidde KF31R Heat Alarm
KF21R Optical Smoke Alarm Features
The Kidde KF21R optical smoke alarm is designed to detect slow, smouldering fires caused by electrical faults, upholstery or cigarettes. Ideal for hallways, bedrooms and living spaces, the optical sensor provides reliable early warning protection.
- Mains-powered optical smoke alarm with sealed rechargeable lithium 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 rooms
- BSI certified to BS EN14604:2005
- 10-year warranty
KF31R Heat Alarm Features
The Kidde KF31R heat alarm is designed for kitchens, garages and loft spaces where smoke alarms may be unsuitable due to steam, cooking fumes or dust. Its thermistor heat sensor provides dependable heat detection while helping to reduce nuisance alarms.
- Mains-powered heat alarm with sealed rechargeable lithium battery back-up
- Thermistor heat sensor for reliable 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 including battery
Key Benefits
- Complete smoke and heat alarm solution for residential properties
- Sealed rechargeable lithium battery back-up for maintenance-free operation
- Interlinked alarms provide whole-home warning when danger is detected
- Quick-Fit bases for fast and simple installation
- Integrated cable management for tidy wiring
- Suitable for compliance with UK Building Regulations
- Grade D1 domestic fire alarm system solution
- Fully compatible with Kidde FIREX smoke, heat and CO alarms
Technical Specifications
KF21R Optical Smoke Alarm
- Model: KF21R
- Power Supply: 230V mains with sealed rechargeable lithium battery back-up
- Sensor Type: Optical
- Alarm Volume: 85dB minimum at 3 metres
- Dimensions: 150mm x 150mm x 53mm
- Weight: 260g
- Operating Temperature: -10°C to +40°C
- Warranty: 10 Years
KF31R Heat Alarm
- Model: KF31R
- Power Supply: 230V mains with sealed rechargeable lithium battery back-up
- Sensor Type: Thermistor heat sensor
- Alarm Volume: 85dB minimum at 3 metres
- Dimensions: 150mm x 66mm
- Weight: 245g
- Operating Temperature: -10°C to +40°C
- Warranty: 10 Years including battery
Please Note: Alarms are supplied individually within the kit. Installation should be completed by a qualified electrician.
Downloads
KF21R Data Sheet:
Download KF21R Data Sheet
KF31R Data Sheet:
Download KF31R Data Sheet
KF21R Instruction Manual:
Download KF21R Instruction Manual
KF31R Instruction Manual:
Download KF31R 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:
- 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