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The best alternative to carbon monoxide detector is not skipping CO protection; it is choosing a different kind of alarm, like a smoke and CO combo or a smart alarm, that still detects CO.
We compared 6 alternatives to a basic CO-only alarm that still include CO detection.
Quick Answer: The Best Alternative to Carbon Monoxide Detector
- Best Combo Alternative: Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery, 30CUD10
- Best Smart Alternative: First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm
- Best Gas and CO Alternative: Kidde Carbon Monoxide + Explosive Gas Alarm, Plug-in with 9V Battery Backup, Digital Display
- Best Interconnected Alternative: X-Sense Wireless Combination Smoke and CO Detector, XP0H-WN, 3-Pack
- Best Air Quality Alternative: Kidde Smart CO Detector + Indoor Air Quality, Plug-in & AA Battery, COPDLQW
- Best Hardwired Alternative: First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm SMICO100-AC
The Kidde 30CUD10 Smoke & CO Detector is our best alternative to carbon monoxide detector units that only sense CO. The First Alert SC5 Smart Smoke & CO Alarm sends phone alerts, and the Kidde CO + Explosive Gas Alarm also senses gas.
Best Alternative to Carbon Monoxide Detector Comparison Table
| Product | Best For | Type | Key Feature | Buy |
|---|---|---|---|---|
| Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery, 30CUD10 | Best Combo Alternative | Smoke and CO combo | 10-year battery, UL 217 and UL 2034 | Check Price |
| First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm | Best Smart Alternative | Smart smoke and CO | App alerts, voice location alerts | Check Price |
| Kidde Carbon Monoxide + Explosive Gas Alarm, Plug-in with 9V Battery Backup, Digital Display | Best Gas and CO Alternative | Plug-in CO and gas alarm | Detects CO plus natural gas and propane | Check Price |
| X-Sense Wireless Combination Smoke and CO Detector, XP0H-WN, 3-Pack | Best Interconnected Alternative | Interconnected smoke and CO | Wireless interconnect, 10-year batteries | Check Price |
| Kidde Smart CO Detector + Indoor Air Quality, Plug-in & AA Battery, COPDLQW | Best Air Quality Alternative | Smart plug-in CO alarm | Wi-Fi alerts, low-level CO, IAQ | Check Price |
| First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm SMICO100-AC | Best Hardwired Alternative | Hardwired smoke and CO | Hardwired, battery backup, interconnect | Check Price |
The 6 Best Alternatives to a Basic CO Alarm
Each pick below was compared on sensor type, power source, alerts, certification and value.
Kidde Smoke & Carbon Monoxide Detector, 10-Year Battery, 30CUD10
1The Kidde 30CUD10 detects both smoke and carbon monoxide and runs on a built-in 10-year battery.
👍 Pros & Cons
Pros
- Smoke and CO in one
- 10-year battery
- Helps reduce cooking false alarms (maker claim)
Cons
- Replace the whole unit at end of life
📄 Detailed Review
- Type: Smoke and CO combo
- Includes: Alarm
- Key feature: 10-year battery, UL 217 and UL 2034
Kidde says it is tested to UL 217 and UL 2034 and helps reduce cooking false alarms.
It is our pick for a combo alarm.
First Alert SC5 Battery Smart Smoke & Carbon Monoxide Alarm
2The First Alert SC5 sends phone alerts through the First Alert app when smoke or CO is detected.
👍 Pros & Cons
Pros
- Phone alerts via the First Alert app
- Voice alerts name the danger and location
- Wireless interconnect
Cons
- Needs Wi-Fi setup
📄 Detailed Review
- Type: Smart smoke and CO
- Includes: Alarm
- Key feature: App alerts, voice location alerts
Voice alerts tell you the type and location of the danger, and compatible alarms interconnect.
It is a smart combo alarm.
Check First Alert SC5 Smart Smoke & CO Alarm Price on Amazon
Kidde Carbon Monoxide + Explosive Gas Alarm, Plug-in with 9V Battery Backup, Digital Display
3This Kidde alarm detects carbon monoxide plus explosive gases such as natural gas and propane.
👍 Pros & Cons
Pros
- Detects CO and explosive gas
- Digital display shows CO or GAS
- 9V backup
Cons
- Placement rules differ for gas
📄 Detailed Review
- Type: Plug-in CO and gas alarm
- Includes: Alarm + 9V battery
- Key feature: Detects CO plus natural gas and propane
Its display shows the CO level or reads GAS when explosive gas is present.
It suits homes with gas appliances.
X-Sense Wireless Combination Smoke and CO Detector, XP0H-WN, 3-Pack
4The X-Sense XP0H-WN 3-pack interconnects wirelessly, so when one alarm detects smoke or CO, all of them sound.
👍 Pros & Cons
Pros
- All alarms sound together
- 10-year sealed batteries
- No wiring needed
Cons
- No Wi-Fi app
📄 Detailed Review
- Type: Interconnected smoke and CO
- Includes: 3 alarms
- Key feature: Wireless interconnect, 10-year batteries
Each alarm runs on a sealed 10-year battery.
It is our pick for whole-home coverage without wiring.
Kidde Smart CO Detector + Indoor Air Quality, Plug-in & AA Battery, COPDLQW
5Kidde’s smart CO detector sends phone alerts through the Kidde app and also tracks humidity and TVOC levels.
👍 Pros & Cons
Pros
- Phone alerts with no subscription (maker claim)
- Low-level CO alerts from 30–70 ppm
- Tracks humidity and TVOC
Cons
- 2.4 GHz Wi-Fi only
📄 Detailed Review
- Type: Smart plug-in CO alarm
- Includes: Alarm + 2 AA batteries
- Key feature: Wi-Fi alerts, low-level CO, IAQ
It gives earlier low-level CO alerts at 30–70 ppm and a separate alarm pattern at 70 ppm.
It suits families who want alerts away from home.
First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm SMICO100-AC
6The First Alert SMICO100-AC is a hardwired smoke and CO alarm with battery backup.
👍 Pros & Cons
Pros
- Interconnects with compatible alarms
- Quick Connect plug
- Battery backup
Cons
- Needs existing wiring
📄 Detailed Review
- Type: Hardwired smoke and CO
- Includes: Alarm
- Key feature: Hardwired, battery backup, interconnect
When one alarm sounds, all compatible interconnected alarms sound too.
It is the pick for replacing wired alarms.
Check First Alert SMICO100-AC Hardwired Smoke & CO Price on Amazon
How We Chose the Best Alternative to Carbon Monoxide Detector
To choose the best alternative to carbon monoxide detector, we compared popular CO alarms and smoke-and-CO combos on Amazon by power source, display, alerts, listed standards and owner feedback.
CDC advises installing battery-operated or battery back-up CO detectors near every sleeping area; see the CDC carbon monoxide poisoning basics.
Product details in this guide are based on manufacturer specifications and verified owner feedback. Read more on our How We Test page.
Buying Guide: Choosing an Alternative
Keep these points in mind before you buy.
There is no substitute for CO detection
Only a CO alarm detects carbon monoxide. Air quality monitors without a UL 2034 CO alarm do not replace one.
CO-only or smoke and CO combo
Combo alarms save ceiling space and batteries; separate alarms let you place CO detectors lower or plug them into outlets.
Smart alerts
Smart alarms send phone alerts when you are away and warn about low batteries before they chirp.
Before Switching
Check four things:
- UL 2034 listing.
- CO alarm, not just a sensor.
- Power backup.
- End-of-life date.
Quick answers about the best alternative to carbon monoxide detector.
Frequently Asked Questions
What is the best alternative to carbon monoxide detector?
The best alternative to carbon monoxide detector units that only sense CO is a combo like the Kidde 30CUD10, or a smart alarm like the First Alert SC5.
Can an air quality monitor replace a CO alarm?
No, use a CO alarm tested to UL 2034.
Is a combo as good as a CO-only alarm?
A listed combo detects CO too; placement needs differ, so read the manual.
Do smart alarms need Wi-Fi?
For phone alerts, yes; they still sound locally.
Does a gas alarm detect CO?
Kidde’s CO + gas model detects both.
Final Verdict
Our final pick for the best alternative to carbon monoxide detector is the Kidde 30CUD10 Smoke & CO Detector. Choose the First Alert SC5 Smart Smoke & CO Alarm if you want phone alerts, or the Kidde CO + Explosive Gas Alarm to also sense gas.
Related Guides
More home safety guides:
- Best Carbon Monoxide Detector
- Best Affordable Carbon Monoxide Detector
- Best Emergency Power Supply for Home
- Best Air Purifier for Bedroom
- Best Electric Blanket for Home
Product details are based on manufacturer specifications at the time of writing. Prices and availability change often, so check Amazon for the latest price.
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