Nest Protect

Smoke & Carbon Monoxide Alarm

The Nest Protect features an industrial-grade smoke sensor and long-lasting carbon monoxide sensor, combined with intelligent technology packed into a sleek body, making it the smoke and CO alarm that other smoke and CO alarms look up to. All of this is backed by a Safelincs exclusive 5 year warranty.

16 in stock Expected dispatch: Tomorrow

Version: Mains Wired

Version: Longlife Battery

Order before 4:30pm for FREE next day delivery on all mainland UK* orders

Phone Alerts

The Nest Protect sends alerts to your phone to let you know when something is wrong, so you'll have peace of mind wherever you are.

No Chirps

No more midnight chirps! The Nest Protect will send you a message when its battery gets low, giving you plenty of time to replace it.

App Silence

Burnt the dinner? Everything under control? No more waving a tea towel, you can silence the Nest Protect directly from the phone app.

Steam is NOT smoke

The Nest Protect is smart enough to tell the difference between smoke and steam using its built-in humidity sensor and custom algorithms.

Lights your way

No more stumbling around in the dark, the new Pathlight function uses motion sensing technology to light your way in the night.

Tests itself

Alarms should be tested monthly, so the Nest Protect schedules automatic testing and sound checks at a time convenient for you.

Exclusive 5 Year Warranty

Nest Protect smoke and carbon monoxide alarms are supplied with a Safelincs Exclusive 5 Year Warranty

  • Green Ring
  • Yellow Ring
  • Red Ring
  • Pathlight

Nightly Promise

The Nest Protect monitors its power levels and sensor state constantly, so every night when you turn out the lights it will give you a comforting green glow to let you know that everything is OK.

Customer Reviews

2 customers have rated this product and it has an overall rating of 5 out of 5

All our reviews are written by real customers that have purchased this product from us and are published without modification.

5 / 5 Stars

Reviewed by: MR

Everything it said it was. Great. Initially had a problem with Wi-Fi connection.

Published on: 18th April 2017

5 / 5 Stars

Reviewed by: -

Really pleased with these alarms. I bought 2 to put in my hallway and landing and haven't been disapointed! The night light which lights the way of you get up at night is brilliant. And being able to silence the alarm from the app is genius.

Published on: 18th January 2016

Technical Specification


Battery Powered

Supplied with 6 long-life AA Energizer® Ultimate Lithium batteries

Mains Powered

Supplied with 230V connector and 3 long-life AA Energizer® Ultimate Lithium back-up batteries



  • Split-Spectrum Sensor, 450 nm and 880 nm wavelength
  • 10-year electrochemical carbon monoxide sensor
  • Heat sensor, ± 1.8 °F (± 1 °C)
  • Humidity sensor, ± 3% RH
  • Occupancy sensor, 120° field of view to 20 feet
  • Ambient light sensor, 1-100,000 lux dynamic range
  • Omni-directional microphone, 70 dBA SNR

Speaker, Siren & Light Ring

Dimensions & Weight

  • Height: 135mm
  • Width: 135mm
  • Depth: 38.5mm
  • Weight: 0.379kg
  • Height: 135mm
  • Width: 135mm
  • Depth: 38.5mm
  • Weight: 0.375kg

Connectivity & Requirements

  • Wi-Fi connection: 802.11a/b/g/n @ 2.4 GHz
  • Wireless Interconnect: 802.15.4 @ 2.4 GHz
  • Bluetooth Low Energy (BLE)
  • Smartphone or tablet with iOS 8 or later, or Android 4.0 or later
  • Free Nest Account

Operating Temperature

The alarm should not be installed in locations where the normal ambient temperature is below 4 °C (40 °F) or exceeds 38 °C (100 °F). Humidity range: 20% RH to 80% RH (non-condensing).


The 2nd generation Nest Protect has been tested by UL to comply with European, US and Canadian safety standards. Nest Protect complies with all of the following smoke and carbon monoxide alarm standards:

  • EN-14604 – Smoke alarm devices.
  • EN-50291 – Electrical apparatus for the detection of carbon monoxide in domestic premises.
  • EN-50271:2010 – Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen.
  • EN-50292 – Electrical apparatus for the detection of carbon monoxide in domestic premises.


What’s in the Box

  • 6 long-life AA Energizer® Ultimate Lithium batteries
  • Back plate
  • Four screws
  • User’s guide
  • Welcome guide
  • 230V AC connector + 3 x long-life backup batteries (Energizer® Ultimate Lithium "L91" AA)
  • Back plate
  • Four screws
  • User’s guide
  • Welcome guide
Free Delivery On all standard* UK orders. Order before 4:30pm for next working day delivery. Find out more Need Help Looking for more information? Contact our dedicated customer support team now. Contact Us Now Find an Installer Find a Nest Pro in your local area to help get your Nest system up and running. Find out more



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