---
title: "Smoke and Carbon Monoxide Alarm — £402K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/smoke-and-carbon-monoxide-alarm"
last_updated: "2026-07-31T10:58:16.747Z"
locale: en
meta:
description: "Niche score 50/100 · £402K/yr market · 183K searches/yr · £20.60 avg price. Soft demand (-34.9% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · £402K/yr market · 183K searches/yr · £20.60 avg price. Soft demand (-34.9% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Smoke and Carbon Monoxide Alarm — £402K/yr Amazon UK Niche (2026) - Flapen"
---
# **smoke and carbon monoxide alarm**
**Worth a look**
Shows low returns (1.0%), but soft demand (-34.9% this quarter) keeps it on the watch list.
Market size 56Growth 8Conversion 90Competition 37Returns 94Price range 82Avg price 89Brand share 19Review moat 31Quality gap 43
**Returns**
**Great****1.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****10.7%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****£20.60**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£10.85–£36.28**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****£402K**
£402K/yr · 183K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****63%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****3,356.94**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Growth**
**Bad****-34.9%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, smoke and carbon monoxide alarm is a £402K/yr Amazon United Kingdom market (183K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Oct–Nov. Verdict: Worth a look — 50/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **smoke and carbon monoxide alarm market data**
- **Units sold / yr**
- **15K–20K**
- avg 750–1,000/product
- **Revenue / yr**
- **£309K–£412K**
- units × avg price
- **Conversion rate**
- **10.7%**
- **Avg BSR**
- **#25**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **94%**
- **Out of stock**
- **1.2%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **173 days**
## **Competition & brand share**
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**8 **—flat
**Sellers**
**34**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**63%**
Top 20: 100%
**Open market**
**3%**
- Fireangel28% - X-Sense24% - Yezala19% - AEGISLINK11% - Kidde10% - Kitire5% - Open — no brand owns it (2 brands, 3%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -34.9% search growth over the last 90 days.
5K3KSpike '24Prime Day '25Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Nov · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/smoke-and-carbon-monoxide-alarm/trend)
## **Top smoke and carbon monoxide alarm search terms**
- **smoke and carbon monoxide alarm**88K/yr-41.7%7.3% conv. - **carbon monoxide and smoke detector**19K/yr-40.9%7.1% conv. - **smoke alarm and carbon monoxide detector**16K/yr-19.1%7.6% conv. - **fire alarm and carbon monoxide detector**13K/yr-36.9%7.5% conv. - **combination smoke & carbon monoxide detectors**7K/yr-23.2%3.2% conv. - **smoke and carbon monoxide alarms for home**6K/yr+41.4%8.8% conv. - **fire and carbon monoxide alarm**9K/yr-24.2%8.7% conv. - **fire angel smoke and carbon monoxide alarms for home**7K/yr-14.2%12.0% conv. - **smoke and co2 alarm detector combined**5K/yr-16.9%9.2% conv. - **carbon monoxide and smoke alarm**4K/yr-35.8%8.6% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/smoke-and-carbon-monoxide-alarm/search-terms)
## **Top smoke and carbon monoxide 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%5%£20K10%£40K15%£60K20%£80K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 18 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**X-Sense Combination Smoke and Carbon Monoxide Alarm with LCD Display & 10-Year Battery Smoke Alarm for Home Compliant with EN 14604 and EN 50291 Standards SC07**X-Sense**£21.68**4.6★5,992 rev](https://www.amazon.co.uk/dp/B083W5HCG6) [2**FireAngel Combination Smoke and Carbon Monoxide Alarm for Home - SCB10-R 10 Year Life Dual Carbon Monoxide Detector and Smoke Alarm with Test and Hush Button - Combined CO and Fire Alarm - White**Fireangel**£23.28**4.4★1,339 rev](https://www.amazon.co.uk/dp/B07PRLXKHY) [3**Smoke & Carbon Monoxide Alarm with Digital LCD Display Combination Smoke Alarm and Carbon Monoxide Detector Replaceable Battery Smoke and CO Alarm for Your Home Garage Office**Yezala**£13.08**4.4★216 rev](https://www.amazon.co.uk/dp/B0DPFVFJJT) [4**Smoke & Carbon Monoxide Alarm with Digital LCD Display AEGISLINK Combination Smoke and CO Alarm Detector with 10-Year Lifespan & Replaceable Battery and Test/Silence Button SC200**AEGISLINK**£17.55**4.6★3,074 rev](https://www.amazon.co.uk/dp/B09YLJHB2P) [5**X-Sense Combination Smoke and Carbon Monoxide Alarm with English Voice Alerts Smoke Alarm for Home with Replaceable Battery XP0A-SR 1-Pack**X-Sense**£20.13**4.6★335 rev](https://www.amazon.co.uk/dp/B0CSG17H65)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**2 Packs Smoke & Carbon Monoxide Alarm Replaceable Battery LCD Digital Display 85dB Loud Siren Hush & Self-Test Dual Sensor Fire CO Detector for Home Bedroom Garage Office**Kitire**£31.57**32 rev4mo ago](https://www.amazon.co.uk/dp/B0GS9SXZ3B) [**Smoke and Carbon Monoxide Alarm Dual Sensor Combination Smoke CO Detector with Digital Display & Replaceable Battery 85dB Loud Alarm for Home Garage Office RV**Yezala**£17.38**647 rev5mo ago](https://www.amazon.co.uk/dp/B0GHPR4Y8C) [**FireAngel Smoke & Carbon Monoxide Alarm SB1-R Battery Smoke Alarm for Home & FA6813 Portable Carbon Monoxide Detector Caravan CO & Fire Monitor Set**Fireangel**£22.80**9,145 rev10mo ago](https://www.amazon.co.uk/dp/B0FPMDWFJN) [**2PACK 2-in 1 Smoke and Carbon Monoxide Detector Powered by Battery with Digital Display Dual Sensor Smoke and Carbon Monoxide Alarm Detector Easy to Instal**Yezala**£23.27**42 rev1y ago](https://www.amazon.co.uk/dp/B0DQ8RSWD5) [**Smoke & Carbon Monoxide Alarm with Digital LCD Display Combination Smoke Alarm and Carbon Monoxide Detector Replaceable Battery Smoke and CO Alarm for Your Home Garage Office**Yezala**£13.08**216 rev1y ago](https://www.amazon.co.uk/dp/B0DPFVFJJT)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**2 Packs Smoke & Carbon Monoxide Alarm Replaceable Battery LCD Digital Display 85dB Loud Siren Hush & Self-Test Dual Sensor Fire CO Detector for Home Bedroom Garage Office**Kitire**£31.57**4.4★**▲ 437%**](https://www.amazon.co.uk/dp/B0GS9SXZ3B) [**Smoke and Carbon Monoxide Alarm Dual Sensor Combination Smoke CO Detector with Digital Display & Replaceable Battery 85dB Loud Alarm for Home Garage Office RV**Yezala**£17.38**4.6★**▲ 270%**](https://www.amazon.co.uk/dp/B0GHPR4Y8C) [**Kidde K10SCO Combination Smoke & CO Alarm with Voice Notification**Kidde**£20.26**4.4★**▲ 96%**](https://www.amazon.co.uk/dp/B0CQ8SFY53) [**Smoke Alarms for Home 10-Year Battery Smoke Alarm Fire Alarm with Test/Silence Button Smoke Detector Certificated by TUV Conforms to EN14604 Standard (2pcs)**WISUALARM**£16.59**4.5★**▲ 58%**](https://www.amazon.co.uk/dp/B0D8NZBMS6) [**X-Sense Wi-Fi Combination Smoke Alarm and Carbon Monoxide Alarm with Replaceable Battery Smart Fire Alarm Compatible with X-Sense Home Security App SC07-WX 1-Pack**X-Sense**£30.35**4.6★**▲ 21%**](https://www.amazon.co.uk/dp/B0CM3KGFGB)
**~~View all trending →~~**
## **What buyers say about smoke and carbon monoxide alarm**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**14%
*“Solid build quality”*
**Value For Money**13%
*“Fairly priced”*
**Assembly/Installation**11%
*“Easy to assemble”*
**Size-Overall**8%
*“Right fit”*
**Alarm/Timer Accuracy**7%
*“Very good alarm, easy to set up and install”*
**Advertised Vs Actual Product**6%
*“Works as intended, so far”*
**Battery Life**5%
*“10 year battery life makes this a good buy”*
**Ease Of Use**5%
*“easy to read”*
**Compactness**3%
*“Small and compact”*
**Efficiency**3%
*“Works ok”*
### **What buyers complain about **
**Durability**24%
*“Failed within 5 months”*
**Battery Life**18%
*“Battery Failure”*
**Noise Level**7%
*“Loud alarm”*
**Alarm/Timer Accuracy**6%
*“False alarms”*
**Functionality-Overall**4%
*“contacted them again to say that it did not work cleaning it”*
**Quality-Overall**4%
*“Not great quality control”*
**Size-Overall**3%
*“the backplate did not fit the unit”*
**Instructions/User Manual/Troubleshooting**3%
*“Im only giving it 3 stars because the instructions are very small to read I had to use UTube to see how to set it up”*
**Value For Money**3%
*“Would not recommend especially for the price”*
**Connectivity-Overall**2%
*“Alarm keeps unconnecting itself from internet”*
### **Top return reasons **
**Alarm/Timer Accuracy**22%
**Functionality-Overall**21%
**Size-Overall**12%
**Defective Material/Parts**8%
**Compatibility-Overall**5%
**Noise Level**3%
**Product Condition**3%
**Battery Life**3%
**Connectivity-Overall**2%
**Touch/Button Controls**2%
## **Common questions**
- **Is smoke and carbon monoxide alarm profitable to sell on Amazon United Kingdom?**
- The niche generates £402K/yr across 18 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -34.9%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the smoke and carbon monoxide alarm niche?**
- 8 brands and 34 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in smoke and carbon monoxide alarm?**
- Top complaints mined from reviews: Durability, Battery Life, Noise Level. The return rate is 1.0%.
- **When does demand for smoke and carbon monoxide alarm peak?**
- Demand peaks in Oct–Nov; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the smoke and carbon monoxide alarm niche?**
- Listings span £10.85–£36.28; the average listing price is £20.60 (sweet spot $15–$100). The average incumbent carries 3,357 reviews — the moat a new listing must climb.
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