---
product_id: 246713477
title: "Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3"
brand: "kidde"
price: "C$19306"
currency: NIO
in_stock: false
reviews_count: 5
category: "Kidde"
url: https://www.desertcart.ni/products/246713477-kidde-ac-plug-in-carbon-monoxide-and-explosive-gas-detector
store_origin: NI
region: Nicaragua
---

# Digital LED CO & gas levels 9V battery backup 85dB loud alarm Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3

**Brand:** kidde
**Price:** C$19306
**Availability:** ❌ Out of Stock

## Summary

> 🚨 Stay Ahead of Danger with Kidde’s Smart Gas & CO Guardian!

## Quick Answers

- **What is this?** Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3 by kidde
- **How much does it cost?** C$19306 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/246713477-kidde-ac-plug-in-carbon-monoxide-and-explosive-gas-detector)

## Best For

- kidde enthusiasts

## Why This Product

- Trusted kidde brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Hush False Alarms:** Smart-Hush button silences nuisance alerts without compromising safety.
- • **Peak Memory Recall:** Tracks last CO detection or test for peace of mind.
- • **Smart Digital Display:** Real-time CO levels & gas alerts keep you informed at a glance.
- • **Reliable Battery Backup:** 9V battery ensures continuous protection during power outages.
- • **Plug & Protect Instantly:** Effortless plug-in setup for immediate home safety.

## Overview

The Kidde KN-COEG-3 is a plug-in carbon monoxide and explosive gas detector featuring advanced electrochemical sensors, a clear digital LED display, and an 85-decibel alarm. It includes a 9-volt battery backup for uninterrupted protection, peak level memory for tracking past alerts, and a Smart-Hush button to silence false alarms. UL listed with a 7-year lifespan and 5-year warranty, it’s designed for easy installation and reliable home safety.

## Description

The Kidde Carbon Monoxide Detector, Propane, Natural, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display uses electrochemical sensor technology to detect poisonous carbon monoxide, methane gas, sewer gas, propane gas or natural gas in your home and alerts you by sounding an 85-decibel alarm & displaying the amount of carbon monoxide detected or stating "gas" on the digital display when detecting explosive gas. Setup is easy as the Kidde carbon monoxide alarm plugs into a standard, 120V AC power outlet in your home, while a 9-volt alkaline battery (included) works as a backup in the event of a power failure. When carbon monoxide is detected, the digital display shows the level of carbon monoxide the alarm is sensing and updates every 15 seconds. Peak Level Memory records the last time carbon monoxide was detected or when the unit was tested. The Smart-Hush button silences the unit for approximately 8 minutes, which is helpful when this smoke detector carbon monoxide detector combo sounds from things like routine cooking or shower steam. Extension cord (included) allows for placement on a table or shelf. Install a carbon monoxide smoke detector combo on every level of your home and near bedrooms to help keep your family safe. UL Certified with a 10-year limited manufacturer's warranty. Meets requirements of UL 2034, UL217, NFPA72, (chapter 11 2002 edition) The State of California Fire Marshal, NFPA101 (One and two family dwellings) Federal Housing Authority (FHA), Housing and Urban Development (HUD).

Review: Haven't seen such a well engineered product in years. It has a plug that is snug for wall mounting, can be rotated, and can even be detached to use as a power brick. Battery backup and comes with a Duracell battery. Documentation seems like it was written by an engineer a tad, but it's a great product. Has a small kickstand too. As far as plastic goes, it seems like it's very good quality. The test works well. Nice to see 0 PPM of explosive gas in the home. Hopefully I never have to review its detection ability. Great job, Kidde, and please don't let your product slide like 95% of modern companies are.
Review: Always purchased previously. Discovered the expiration date was already outdated. Kept indicating carbon, had local fire-station try it and same thing happened. ±±Bought different brand from Lowes that works great, 5 yr warranty, etc. Important that you have a carbon doctor that works.

## Features

- Easy Installation - simply plug-in to a standard, 120V outlet in your home
- 9-volt battery backup provides protection during a power outage
- Digital LED display shows the level of carbon monoxide the CO alarm is sensing or states "GAS" when explosive gas is present
- 85-decibel alarm announces when carbon monoxide or explosive gas is detected
- Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
- Test-Hush Button makes testing the detector or silencing false alarms easy
- Extension cord (included) allows for placement on a table or shelf
- UL Listed with a lifespan of 7 years and a 5-year limited warranty which begins when the alarm is powered on, if that date is unknown it should be assumed the alarm should be replaced.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002EVNJ6 |
| Alarm | Audible, Visual |
| Best Sellers Rank | #113,670 in Home Improvement ( See Top 100 in Home Improvement ) #340 in Home Security Alarms |
| Brand | Kidde |
| Country of Origin | USA |
| Generic Name | Combination Carbon Monoxide & Explosive Gas Detector |
| Global Trade Identification Number | 00784908011305, 00784908113054 |
| Item Weight | 454 g |
| Item model number | KN-COEG-3 |
| Manufacturer | Kidde |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 10.2D x 10.2W x 5.1H Centimeters |
| Sensor Type | Electrochemical |
| Style | Digital |
| UPC | 783961021658 640025010112 784908113054 784908011305 |
| Upper Temperature Rating | 100 Degrees Fahrenheit |

## Product Details

- **Alarm:** Audible, Visual
- **Brand:** Kidde
- **Global Trade Identification Number:** 00784908011305, 00784908113054
- **Item Weight:** 454 g
- **Number of Items:** 1
- **Power Source:** Battery Powered
- **Product Dimensions:** 10.2D x 10.2W x 5.1H Centimeters
- **Sensor Type:** Electrochemical
- **Style:** Digital
- **Upper Temperature Rating:** 100 Degrees Fahrenheit

## Images

![Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3 - Image 1](https://m.media-amazon.com/images/I/71qAcXzl4AL.jpg)
![Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3 - Image 2](https://m.media-amazon.com/images/I/71YSzCqVynL.jpg)
![Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3 - Image 3](https://m.media-amazon.com/images/I/81-z9hbKWtL.jpg)
![Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3 - Image 4](https://m.media-amazon.com/images/I/819BjbvF2kL.jpg)
![Kidde AC Plug-in Carbon Monoxide and Explosive Gas Detector Alarm | Nighthawk Sensor Technology | Model # KN-COEG-3 - Image 5](https://m.media-amazon.com/images/I/81InMjn6A8L.jpg)

## Questions & Answers

**Q: I smell natural gas in my house, and am wondering if that is the same as explosive gas? Will it detect natural gas?**
A: As someone who went through firefighter 1 and 2 and got certified, yes. Natural gas will be detected by an "explosive gas detector." These detectors detect when natural gas or propane is approaching a percentage of the "Lower Explosive Limit", the percentage of the gas that needs to fill the airspace for combustion to occur. Since the two gases are different but are usually  detected by the same sensor, they will go off for the gas that has a lower LEL for safety. If it goes off, leave your house imediately and call 911 for the fire department. Yes Natural gas has additives that make it smell like rotten eggs, but you can get used to this smell or it can be scrubbed entirely from the gas by dirt/soil. The latter is the cause of unexpected explosions in neighborhoods you may have periodically heard about in the news. Only way to know for sure is a detector.

**Q: is this an explosive gas and carbon monoxide detector? it only says "carbon monoxide detector" on the actual product.**
A: you may own Kidde 900-0076-01 KN-COPP-3  which looks similar but only detects carbon monoxide.

**Q: What is the sound level  I need one for basement and need to hear on ground floor ?**
A: For sure will be able to hear it.7 out of 10 sound level .

**Q: what happens if you do not use the battery at all?**
A: It beeps constantly says LB or Low Battery.  Basically annoys you to death until you unplug and get a battery

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***N on 8 February 2026*

Haven't seen such a well engineered product in years. It has a plug that is snug for wall mounting, can be rotated, and can even be detached to use as a power brick. Battery backup and comes with a Duracell battery. Documentation seems like it was written by an engineer a tad, but it's a great product. Has a small kickstand too. As far as plastic goes, it seems like it's very good quality. The test works well. Nice to see 0 PPM of explosive gas in the home. Hopefully I never have to review its detection ability. Great job, Kidde, and please don't let your product slide like 95% of modern companies are.

### ⭐⭐⭐⭐ Review
*by G***N on 4 February 2026*

Always purchased previously. Discovered the expiration date was already outdated. Kept indicating carbon, had local fire-station try it and same thing happened. ±±Bought different brand from Lowes that works great, 5 yr warranty, etc. Important that you have a carbon doctor that works.

### ⭐⭐⭐⭐⭐ Review
*by K***G on 6 February 2026*

We use these all over our house. They are super convenient and plug into a wall socket. It is convenient for us to do this in bedrooms and hallways rather than hardwire them into our home. They clearly tell you when to replace the backup battery, and even when to replace the unit if it is past its lifetime. These are our second round in our home.

## Frequently Bought Together

- Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display
- Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button
- Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-12*