---
title: "Carbon Monoxide Detectors/smoke Alarm — $1.6M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/carbon-monoxide-detectors-smoke-alarm"
last_updated: "2026-08-06T14:09:33.093Z"
locale: en
meta:
description: "Niche score 54/100 · $1.6M/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · $1.6M/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Carbon Monoxide Detectors/smoke Alarm — $1.6M/yr Amazon US Niche (2026) - Flapen"
---
# **carbon monoxide detectors/smoke alarm**
**Worth a look**
Shows a $1.6M/yr market, but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 87Growth 14Conversion 62Competition 75Returns 55Price range 36Avg price 84Brand share 0Review moat 56Quality gap 67
**Market size**
**Great****$1.6M**
$1.6M/yr · 382K searches
**Avg price**
**Great****$74.86**
avg listing price — sweet spot $15–$100
**Competition**
**Great****40%**
top-5 click share — an open shelf
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****5.4%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****1,248.3**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Good****2.8%**
return rate — above 5% kills the launch gate
**Price range**
**Okay****$16.54–$245.32**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Bad****-22.1%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, carbon monoxide detectors/smoke alarm is a $1.6M/yr Amazon United States market (382K searches/yr). The top 5 brands hold 100% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 30, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **carbon monoxide detectors/smoke alarm market data**
- **Units sold / yr**
- **25K–30K**
- avg 500–750/product
- **Revenue / yr**
- **$1.9M–$2.2M**
- units × avg price
- **Conversion rate**
- **5.4%**
- **Avg BSR**
- **#16**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **80%**
- **Out of stock**
- **4.3%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **139 days**
## **Competition & brand share**
Clicks spread well past the top 5 (40% combined) — an open shelf where new products get seen.
**Brands**
**3 **—flat
**Sellers**
**97**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**40%**
Top 20: 79%
**Open market**
**0%**
- First Alert49% - Kidde37% - X-Sense14% - Open — no brand owns it (0%)
## **Demand**
Weekly Amazon search volume, last 17 weeks — -22.1% search growth over the last 90 days.
8K6KApr '26Apr '26May '26May '26May '26Jun '26Jun '26Jul '26Jul '26
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/carbon-monoxide-detectors-smoke-alarm/trend)
## **Top carbon monoxide detectors/smoke alarm search terms**
- **kidde smart p4010dcsco-w (battery)**43K/yr-31.1%2.6% conv. - **smoke and carbon monoxide detector 10 year battery**40K/yr-23.5%2.4% conv. - **fire detectors and carbon monoxide for home**36K/yr-38.5%4.0% conv. - **10 year smoke and carbon monoxide detector**33K/yr-29.3%5.6% conv. - **combination smoke and carbon monoxide detectors**25K/yr+12.0%4.7% conv. - **carbon monoxide detectors/smoke alarm**26K/yr-3.4%0.4% conv. - **fire detector and carbon monoxide detector**20K/yr+3.2%0.7% conv. - **rv smoke and carbon monoxide detector**14K/yr+52.5%4.5% conv. - **battery operated smoke and carbon dioxide detector**13K/yr-29.5%7.4% conv. - **first alert smco210**12K/yr+27.9%15.0% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/carbon-monoxide-detectors-smoke-alarm/search-terms)
## **Top carbon monoxide detectors/smoke alarm products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%4%$62K8%$124K12%$186K16%$248K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**First Alert 10-Year Battery Combination Smoke & Carbon Monoxide Alarm**First Alert**$39.12**3.8★1,608 rev](https://www.amazon.com/dp/B0CJMMVST2) [2**First Alert Battery Combination Smoke & Carbon Monoxide Alarm**First Alert**$40.00**4.5★969 rev](https://www.amazon.com/dp/B0CY3BZCX9) [3**Kidde Smoke & Carbon Monoxide Detector 10-Year Battery 30CUD10-V 1 Pack**Kidde**$62.60**4.2★425 rev](https://www.amazon.com/dp/B0CX6FQRF3) [4**First Alert Hardwire Combination Smoke & Carbon Monoxide Alarm**First Alert**$50.54**4.5★1,569 rev](https://www.amazon.com/dp/B0CLVRSC1Q) [5**X-Sense Smoke Detector Carbon Monoxide Detector Combo SC07 1-Pack**X-Sense**$33.56**4.6★4,104 rev](https://www.amazon.com/dp/B09P52JX2R)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**X-Sense Smoke & Carbon Monoxide Alarm SC06 1-Pack**X-Sense**$36.31**245 rev4mo ago](https://www.amazon.com/dp/B0GRGSF49J) [**X-Sense Smoke Detector Carbon Monoxide Alarm Combo XP0H-SN 1-Pack**X-Sense**$35.86**131 rev1y ago](https://www.amazon.com/dp/B0CLLVNDPF) [**Kidde Smoke & Carbon Monoxide Detector 10-Year Battery Powered Voice Alerts LED Warning Light Indicators 2 Pack**Kidde**$92.60**451 rev1y ago](https://www.amazon.com/dp/B0DDWB196S) [**Kidde Smoke & Carbon Monoxide Detector 10-Year Battery Powered LED Warning Light Indicators 4 Pack**Kidde**$177.13**530 rev1y ago](https://www.amazon.com/dp/B0DDWDDGDS) [**Kidde Smoke & Carbon Monoxide Detector 10-Year Battery 30CUD10 1 Pack**Kidde**$49.20**1,136 rev2y ago](https://www.amazon.com/dp/B0CX6BWRMM)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**X-Sense Smoke & Carbon Monoxide Alarm SC06 1-Pack**X-Sense**$36.31**4.6★**▲ 183%**](https://www.amazon.com/dp/B0GRGSF49J) [**Kidde Smoke & Carbon Monoxide Detector AA Battery Powered not wired Voice Alerts LED Warning Light Indicators**Kidde**$53.55**4.5★**▲ 168%**](https://www.amazon.com/dp/B0C8LYNJCY) [**First Alert Battery Smoke Alarm**First Alert**$32.89**4.6★**▲ 131%**](https://www.amazon.com/dp/B0CJLN45JZ) [**X-Sense Smoke Detector Carbon Monoxide Alarm Combo XP0H-SN 1-Pack**X-Sense**$35.86**4.6★**▲ 129%**](https://www.amazon.com/dp/B0CLLVNDPF) [**First Alert Battery Combination Smoke & Carbon Monoxide Alarm**First Alert**$109.68**4.5★**▲ 125%**](https://www.amazon.com/dp/B0CLVRPNZX)
**~~View all trending →~~**
## **What buyers say about carbon monoxide detectors/smoke alarm**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Assembly/Installation**26%
*“Easy set up”*
**Quality-Overall**12%
*“Good price for quality of products”*
**Advertised Vs Actual Product**9%
*“Exactly what I wanted”*
**Value For Money**9%
*“Excellent value”*
**Battery Life**5%
*“Batteries life is great”*
**Efficiency**5%
*“Does the job”*
**Alarm/Timer Accuracy**3%
*“Excellent fire alarm”*
**Sensor**3%
*“These combination detectors are really good”*
**Ease Of Use**3%
*“Easy peasy”*
**Size-Overall**2%
*“Fit right in the existing mount”*
### **What buyers complain about **
**Durability**25%
*“DOESN'T LAST”*
**Battery Life**12%
*“Battery was dead when received”*
**Quality-Overall**9%
*“Not the quality I was expecting”*
**Functionality-Overall**8%
*“Did not work”*
**Noise Level**7%
*“began incredibly irritating beeping”*
**Value For Money**6%
*“They were a little expensive”*
**Alarm/Timer Accuracy**5%
*“Defective alarm”*
**Assembly/Installation**2%
*“Tricky to install”*
**Size-Overall**2%
*“it does not fit”*
**Advertised Vs Actual Product**2%
*“Not what advertised”*
### **Top return reasons **
**Alarm/Timer Accuracy**29%
**Compatibility-Overall**13%
**Connectivity-Overall**12%
**Functionality-Overall**8%
**Size-Overall**8%
**Value For Money**7%
**Advertised Vs Actual Product**7%
**Defective Material/Parts**3%
**Product Condition**2%
**Assembly/Installation**2%
## **Common questions**
- **Is carbon monoxide detectors/smoke alarm profitable to sell on Amazon United States?**
- The niche generates $1.6M/yr across 40 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is -22.1%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the carbon monoxide detectors/smoke alarm niche?**
- 3 brands and 97 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in carbon monoxide detectors/smoke alarm?**
- Top complaints mined from reviews: Durability, Battery Life, Quality-Overall. The return rate is 2.8%.
- **What does it cost to enter the carbon monoxide detectors/smoke alarm niche?**
- Listings span $16.54–$245.32; the average listing price is $74.86 (sweet spot $15–$100). The average incumbent carries 1,248 reviews — the moat a new listing must climb.
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