Nest S3003LWEF Protect WiFi Smoke and Carbon Monoxide (2nd Gen) – Wired

Brand: NEST
Model Number: S3003LWEF
UPC: 854448003754
Model Number: S3003LWEF
UPC: 854448003754
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Nest S3003LWEF Protect WiFi Smoke and Carbon Monoxide (2nd Gen) – Wired

  • Sends a message to your phone if the alarm goes off or the batteries start to run low
  • Can deliver an early warning in the form of a Heads-Up alert that tells you where smoke or carbon monoxide levels are rising
  • Compatible with Amazon Echo (Alexa) or Google Home
  • Pathlight automatically lights your way when you get up in the middle of the night
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Frequently Bought Together

Nest S3003LWEF Wired+Nest NC5100EF Hello Camera
Price for both:   $448.00

Product Description

Features & Specifications



Nest S3003LWEF Protect WiFi Smoke and Carbon Monoxide (2nd Gen) – Wired

We’ve all had that moment of panic when the smoke alarm blasts us out of a deep sleep. Where’s the smoke? Is it a crumb in the toaster oven, or is the kitchen engulfed in flames? Your standard alarm can’t tell you much, but a Nest Protect can give you an instant report, so you know what to do next.

In fact, if you install multiple Nest smoke detectors, they can talk to each other so you know which room or rooms are affected. As soon as Nest Protect senses there’s a problem, you’ll get a friendly notification. If things get worse, Nest Protect will flash red, sound an alarm and tell you what you need to know, using words. It can also send a message to your phone or tablet so you know what’s going on when you’re away. The detector connects to a 120-volt AC line with three included wire nuts.

Nest S3003LWEF Wired


The new Nest S3003LWEF Protect looks for fast burning fires, slow, smouldering fires and invisible carbon monoxide. It speaks up to tell you what the problem is and where it is. It can also give you a friendly Heads-Up before it has to sound the alarm and you can hush it with your phone. In case you’re not home, Nest Protect alerts your phone when the alarm goes off or the batteries run low. It also gives you peace of mind by testing itself over 400 times a day and showing you everything’s working with a quick green glow when you turn off the lights. And it looks after your family for up to 10 years.

  • Notifications on your phone. Nest S3003LWEF Protect provides battery and sensor status notifications on your phone so you’re always informed, and safety history so you can see what happened over the last 10 days.
  • Split-Spectrum Sensor. Seconds count. The Split-Spectrum Sensor detects both fast and slow burning fires.
  • Receive clear direction in an emergency. An alarms speaks to you with a human voice and tells you the location and levels of smoke or carbon monoxide when they are present.
  • Get an early warning signal. If a cooking mishap leads to a small amount of smoke, Nest S3003LWEF Protect will let you know without setting off the full alarm, while App Silence lets you quiet down false alarms with your phone instead of your dish towel.
  • Light your path at night. Pathlight illuminates your way in the dark. Adjust its brightness, leave it on as a nightlight or turn it off from the Nest App.
  • Stay on top of any situation. Synchronized sensors ensure that when one alarm senses danger, every Nest S3003LWEF Protect in the house will make you aware of the situation.


Your Nest devices work together to give you more control over home security. If your smoke detector sends you an alert while you’re at work, you can turn on your Nest camera and assess the situation instantly, then use the camera’s microphone and speakers to warn anyone who might be home. Even better, if your Nest Protect senses rising levels of carbon monoxide, your Nest Thermostat can automatically turn off your gas furnace.

Brand NEST   Model NEST S3003LWEF
Product: Nest S3003LWEF Protect WiFi Smoke and Carbon Monoxide (2nd Gen) - Wired

Brand: Nest
Model: S3003LWEF
Type: Smoke + Carbon Monoxide Alarm
Color: White

Power: 120 V Connector
Three long-life AA Energizer Ultimate Lithium backup batteries

Pre-installed languages by country
United States: English, Spanish
Canada: English, French (Québécois)
United Kingdom: English (British)
France, Belgium and Netherlands: French and Dutch
Note- After setup, you can change the language Nest Protect speaks to any of the above languages.

Split-Spectrum Sensor, 450 nm and 880 nm wavelength
10 year electrochemical carbon monoxide sensor
Heat sensor, +/- 1 degrees Celsius (+/- 1.8 degrees Fahrenhit)
Humidity sensor, +/- 3%RH
Occupancy sensor, 120 degree field of view to 6 meters (20 feet)
Ambient light sensor, 1 – 100k Lux Dynamic Range
Omnidirectional microphone, 70 dBA SNR

Speaker, horn, and light ring:
2 Watt Speaker
Horn: 85 dB SPL at 3 m (10 feet)
RGB color ring with 6 LEDs

Connectivity requirements:
Wi-Fi connection
Phone or tablet with iOS 8 or later, or Android 4.1 or later
Free Nest Account

Working Wi-Fi connection: 802.11b/g/n at 2.4 GHz
Wireless Interconnect: 802.15.4 at 2.4 GHz
Bluetooth Low Energy (BLE)

Operating Temperature:
The alarm should not be installed in locations where the normal ambient temperature is below 4 degrees Celsius (40 degrees Fahrenhit) or exceeds 38 degrees Celsius (100 degrees Fahrenhit).
Humidity range: 20% RH to 80% RH (non condensing).

Voice alarms with custom location

Phone alerts include:
Carbon monoxide
Sensor failure
Split-Spectrum Sensor
Nest App
App Silence
Detects carbon monoxide
Heads-Up alerts
Sound Check
Nightly Promise
Self Test
Steam Check
Wireless Interconnect
Safety History
What To Do
Home Report
Emergency Shutoff with Nest Learning Thermostat
Emergency clip record with Nest Cam

Dimension & Weight:
Dimensions-5.30" x 5.30" x 1.50"
Weight-0.83 lb.

Type-Smoke / CO / Gas

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Nest Canada 2 Year Limited Manufacturers Warranty


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