---
title: "Carbon Monoxide Detector 2 Pack — £99K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/carbon-monoxide-detector-2-pack"
last_updated: "2026-07-31T15:08:30.809Z"
locale: en
meta:
description: "Niche score 41/100 · £99K/yr market · 43K searches/yr · £16.13 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · £99K/yr market · 43K searches/yr · £16.13 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Carbon Monoxide Detector 2 Pack — £99K/yr Amazon UK Niche (2026) - Flapen"
---
# **carbon monoxide detector 2 pack**
**Skip it**
Soft demand (-71.5% this quarter) — this niche doesn't clear our bar today.
Market size 25Growth 0Conversion 96Competition 18Returns 98Price range 67Avg price 78Brand share 21Review moat 41Quality gap 32
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****14.2%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****£16.13**
avg listing price — sweet spot $15–$100
**Price range**
**Good****£11.03–£23.22**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****2,371**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****£99K**
£99K/yr · 43K searches
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-71.5%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, carbon monoxide detector 2 pack is a £99K/yr Amazon United Kingdom market (43K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Jan–Feb–Oct–Nov. Verdict: Skip it — 41/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **carbon monoxide detector 2 pack market data**
- **Units sold / yr**
- **6K–8K**
- avg 250–500/product
- **Revenue / yr**
- **£97K–£129K**
- units × avg price
- **Conversion rate**
- **14.2%**
- **Avg BSR**
- **#26**
- **Page quality**
- **0%**
- **Prime**
- **85%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **33 months**
- **Avg seller age**
- **180 days**
## **Competition & brand share**
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**24**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**78%**
Top 20: 100%
**Open market**
**4%**
- Kidde37% - Fenary22% - Fireangel17% - X-Sense8% - USBNOVEL7% - HOMELYLIFE4% - Open — no brand owns it (2 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -71.5% search growth over the last 90 days.
2K2KSpike '24Black Friday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Oct, Nov · busiest ÷ quietest = 4.5×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/carbon-monoxide-detector-2-pack/trend)
## **Top carbon monoxide detector 2 pack 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%10%£10K20%£20K30%£30K40%£40K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Twin Pack Kidde 5CO Battery Powered Carbon Monoxide Alarm and Detector - 10 Year Sensor Life with AA Batteries**Kidde**£20.01**4.7★2,021 rev](https://www.amazon.co.uk/dp/B0C3WB6742) [2**2Pack Carbon Monoxide Detector Carbon Monoxide Alarm Battery Powered With Led Display Screen And 85 Decibel Sound And Light Alarm(Not included AAA Batteries)**Fenary**£12.84**4.3★67 rev](https://www.amazon.co.uk/dp/B0DJ88KMJN) [3**FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home w/Batteries - Travel Portable Carbon Monoxide Detector - CO Detector Monitor w/Test Button - 2-Pack**Fireangel**£23.22**4.7★9,145 rev](https://www.amazon.co.uk/dp/B0CW3VSNKP) [4**X-Sense Carbon Monoxide Detector Replaceable Battery Powered CO Alarm with Digital Display Portable Carbon Monoxide Alarm for Home with CO Peak Value Memory XC0C-SR 2-Pack**X-Sense**£18.51**4.7★4,929 rev](https://www.amazon.co.uk/dp/B0DTF3QR4R) [5**Carbon Monoxide Detectors 2 Pack Fenary Carbon Monoxide Alarm Replaceable Battery Operated with LCD Digital Display CO Alarm Detector Monitor with Test Button for Home(Batteries NOT Included)**Fenary**£11.41**4.4★186 rev](https://www.amazon.co.uk/dp/B0D89R9WWT)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Carbon Monoxide Detector 2 Pack Battery Powered CO Alarm with LED Display 85 dB Audible EN50291 Standard Mini Portable Carbon Monoxide Alarm for Home and Car Safety (AAA Battery NOT Included)**HOMELYLIFE**£18.27**49 rev4mo ago](https://www.amazon.co.uk/dp/B0GS4N47HT) [**2 Pack Carbon Monoxide Detectors - Carbon Monoxide Alarm Battery Powered CO Detectors with Digital Display for Home Easy to Install**Awatin**£19.04**16 rev8mo ago](https://www.amazon.co.uk/dp/B0CBPNT5XK) [**Carbon Monoxide Detector with Digital Display CO Alarm with Replaceable Battery - 10 Year Sensor Life Portable Carbon Monoxide Alarm for Home with Memory Alarm Function 1 Pack(White).**Safeliveo**£11.03**610 rev11mo ago](https://www.amazon.co.uk/dp/B0FLPR1P5X) [**2Pack Carbon Monoxide Detector Carbon Monoxide Alarm Battery Powered With Led Display Screen And 85 Decibel Sound And Light Alarm(Not included AAA Batteries)**Fenary**£12.84**67 rev1y ago](https://www.amazon.co.uk/dp/B0DJ88KMJN) [**Carbon Monoxide Detector 2 Pack Battery Operated Carbon Monoxide Alarm with LCD Digital Display EN 50291 CO Alarms Monitor for Home Safety (AA Battery NOT Included)**HOMELYLIFE**£17.17**435 rev1y ago](https://www.amazon.co.uk/dp/B0DQXVMTMY)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Carbon Monoxide Detector 2 Pack Battery Powered CO Alarm with LED Display 85 dB Audible EN50291 Standard Mini Portable Carbon Monoxide Alarm for Home and Car Safety (AAA Battery NOT Included)**HOMELYLIFE**£18.27**4.5★**▲ 827%**](https://www.amazon.co.uk/dp/B0GS4N47HT) [**Carbon Monoxide Detector Carbon Monoxide Alarm With LED display CO Alarms Monitor for Home Safety Comply with EN50291 Standard (AA Battery NOT Included) (white)**USBNOVEL**£12.78**4.5★**▲ 329%**](https://www.amazon.co.uk/dp/B0CNVXGVPK) [**2Pack Carbon Monoxide Detector Carbon Monoxide Alarm Battery Powered With Led Display Screen And 85 Decibel Sound And Light Alarm(Not included AAA Batteries)**Fenary**£12.84**4.3★**▲ 216%**](https://www.amazon.co.uk/dp/B0DJ88KMJN) [**X-Sense Carbon Monoxide Detector Replaceable Battery Powered CO Alarm with Digital Display Portable Carbon Monoxide Alarm for Home with CO Peak Value Memory XC0C-SR 2-Pack**X-Sense**£18.51**4.7★**▲ 109%**](https://www.amazon.co.uk/dp/B0DTF3QR4R) [**Carbon Monoxide Detectors 2 Pack Fenary Carbon Monoxide Alarm Replaceable Battery Operated with LCD Digital Display CO Alarm Detector Monitor with Test Button for Home(Batteries NOT Included)**Fenary**£11.41**4.4★**▲ 98%**](https://www.amazon.co.uk/dp/B0D89R9WWT)
**~~View all trending →~~**
## **What buyers say about carbon monoxide detector 2 pack**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**19%
*“The build quality feels solid”*
**Value For Money**18%
*“Good Value”*
**Assembly/Installation**11%
*“Easy to assemble”*
**Advertised Vs Actual Product**10%
*“was as advertised”*
**Size-Overall**5%
*“Easy to fit and test”*
**Ease Of Use**5%
*“Easy to use”*
**Compactness**4%
*“the design is compact”*
**Battery Life**4%
*“Was functioning fine with enough battery/recently tested”*
**Efficiency**3%
*“Works ok”*
**Sensor**2%
*“Compact sensor and working well”*
### **What buyers complain about **
**Instructions/User Manual/Troubleshooting**11%
*“AWFUL INSTRUCTIONS AND SERVICE”*
**Size-Overall**10%
*“the backplate did not fit the unit”*
**Functionality-Overall**10%
*“Don't work”*
**Quality-Overall**8%
*“Not great quality control”*
**Battery Life**7%
*“batteries died 18 months later”*
**Durability**6%
*“then died completely”*
**Noise Level**5%
*“Sound level is very loud”*
**Ease Of Use**4%
*“Open Impossible”*
**Value For Money**3%
*“seems high”*
**Compactness**2%
*“Small compact”*
### **Top return reasons **
**Functionality-Overall**21%
**Defective Material/Parts**14%
**Alarm/Timer Accuracy**14%
**Size-Overall**9%
**Battery Life**6%
**Touch/Button Controls**3%
**Compatibility-Overall**3%
**Quality-Overall**3%
**Certifications**3%
**Instructions/User Manual/Troubleshooting**2%
## **Common questions**
- **Is carbon monoxide detector 2 pack profitable to sell on Amazon United Kingdom?**
- The niche generates £99K/yr across 13 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is -71.5%. Flapen's verdict: Skip it (41/100).
- **How competitive is the carbon monoxide detector 2 pack niche?**
- 8 brands and 24 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in carbon monoxide detector 2 pack?**
- Top complaints mined from reviews: Instructions/User Manual/Troubleshooting, Size-Overall, Functionality-Overall. The return rate is 0.4%.
- **When does demand for carbon monoxide detector 2 pack peak?**
- Demand peaks in Jan–Feb–Oct–Nov; the busiest month runs 4.5× the quietest.
- **What does it cost to enter the carbon monoxide detector 2 pack niche?**
- Listings span £11.03–£23.22; the average listing price is £16.13 (sweet spot $15–$100). The average incumbent carries 2,371 reviews — the moat a new listing must climb.
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