---
title: "Co2 Monitor — £86K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/diy-tools/co2-monitor"
last_updated: "2026-07-31T07:22:57.500Z"
locale: en
meta:
description: "Niche score 50/100 · £86K/yr market · 107K searches/yr · £21.55 avg price. Soft demand (-31.3% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · £86K/yr market · 107K searches/yr · £21.55 avg price. Soft demand (-31.3% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Co2 Monitor — £86K/yr Amazon UK Niche (2026) - Flapen"
---
# **co2 monitor**
**Worth a look**
Shows low returns (0.6%), but soft demand (-31.3% this quarter) keeps it on the watch list.
Market size 22Growth 9Conversion 47Competition 38Returns 97Price range 83Avg price 91Brand share 65Review moat 36Quality gap 86
**Returns**
**Incredible****0.6%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****£21.55**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Price range**
**Great****£7.58–£55.63**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Good****66%**
top-5 brand share — brands hold most of the demand
**Conversion**
**Okay****3.7%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Okay****2,943.68**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Bad****£86K**
£86K/yr · 107K searches
**Growth**
**Bad****-31.3%**
90-day search growth — must beat 0% to launch
**Signals**[** Out of Stock**](https://flapen.com/research/niches?market=uk&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United Kingdom niche tracking, co2 monitor is a £86K/yr Amazon United Kingdom market (107K searches/yr). The top 5 brands hold 66% of demand. Demand peaks in Oct–Nov–Dec. Verdict: Worth a look — 50/100.
Data updated Jul 22, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **co2 monitor market data**
- **Units sold / yr**
- **6K–8K**
- avg 250–500/product
- **Revenue / yr**
- **£129K–£172K**
- units × avg price
- **Conversion rate**
- **3.7%**
- **Avg BSR**
- **#15**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **100%**
- **Out of stock**
- **12.4%**
- **Avg brand age**
- **29 months**
- **Avg seller age**
- **178 days**
## **Competition & brand share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **▼falling
**Sellers**
**32**
**Top-5 brand share**
**66%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 100%
**Open market**
**26%**
- SwitchBot23% - Fireangel14% - HISUEKIG12% - focombance9% - Kidde8% - Temtop8%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -31.3% search growth over the last 90 days.
5K3KSpike '24Black Friday '24Prime Day '25Spike '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.1×
[**Open Trend **](https://flapen.com/research/uk/diy-tools/co2-monitor/trend)
## **Top co2 monitor search terms**
- **co2 monitor**48K/yr-34.0%3.5% conv. - **carbon dioxide detector**24K/yr-23.3%6.1% conv. - **carbon dioxide monitor**13K/yr-37.6%3.7% conv. - **co2 meter**6K/yr-33.6%2.5% conv. - **co2 sensor**4K/yr-22.3%2.1% conv. - **co2 detectors**3K/yr+2.6%2.5% conv. - **c02 monitor**4K/yr-49.0%5.0% conv. - **co2 monitor for home**4K/yr-30.1%8.1% conv. - **carbon dioxide**2K/yr-26.6%3.5% conv. [**All search terms **](https://flapen.com/research/uk/diy-tools/co2-monitor/search-terms)
## **Top co2 monitor 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%£9K20%£17K30%£26K40%£35K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 19 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**SwitchBot CO2 detector with Built-in Hygrometer Temperature Humidity Monitor with carbon dioxide monitor Bluetooth CO2 Monitor 2-Year Data Storage SwitchBot Hub Required for WiFi Function**SwitchBot**£44.88**4.5★1,113 rev](https://www.amazon.co.uk/dp/B0DBVDWB6G) [2**FireAngel Carbon Monoxide Alarm and Detector - FA6813 10-Year Sensor Life CO Alarm for Home with AA Batteries - Travel Portable Carbon Monoxide Detector - CO Detector Monitor with Test Button Single**Fireangel**£11.94**4.7★9,145 rev](https://www.amazon.co.uk/dp/B0CKWGSX22) [3**Air Quality Monitor Indoor Carbon Dioxide Monitor with LCD Display Carbon Dioxide Detector CO2 Monitor 5 In 1 Air Pollution Tester for Home Kitchen Office Car**HISUEKIG**£14.43**3.4★13 rev](https://www.amazon.co.uk/dp/B0FLQ9N9FQ) [4**Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home**Kidde**£11.08**4.6★33,828 rev](https://www.amazon.co.uk/dp/B07WSX4NCV) [5**Temtop CO2 Monitor Indoor Air Quality Monitor Portable Carbon Dioxide Detector CO2 Temperature Humidity Meter for Home Office School**Temtop**£43.21**4.4★766 rev](https://www.amazon.co.uk/dp/B0CGX22CR8)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**CO2 Monitor Detector focombance 5 in 1 CO2 Detector Alarm Carbon Dioxide Detector Indoor Air Quality Monitor Temperature Humidity SensMonitor LCD Display Home Office Gym Car Multi**focombance**£15.53**8 rev2mo ago](https://www.amazon.co.uk/dp/B0H13XSQ4M) [**CO2 Monitor**focombance**£14.94**2 rev3mo ago](https://www.amazon.co.uk/dp/B0GCHFQG81) [**CO2 Monitor Detector**focombance**£14.94**1 rev5mo ago](https://www.amazon.co.uk/dp/B0GMP1WG43) [**FUMIXTEX Carbon Monoxide Detector with LCD Display CO Alarms Replaceable Battery Powered 10 Year Sensor Life Portable CO Detectors for Travel 1 PCS**FUMIXTEX**£10.31**55 rev7mo ago](https://www.amazon.co.uk/dp/B0GCCZCVG6) [**SONOFF AirGuard CO2 Smart Indoor Air Quality Monitor Matter Compatible 2.4GHz WiFi Carbon Dioxide Detector for CO2/Temp/Humidity Real-Time Display & Alarm for Bedroom Nusery room**SONOFF**£36.12**135 rev8mo ago](https://www.amazon.co.uk/dp/B0G2WDPB29)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**CO2 Monitor Detector focombance 5 in 1 CO2 Detector Alarm Carbon Dioxide Detector Indoor Air Quality Monitor Temperature Humidity SensMonitor LCD Display Home Office Gym Car Multi**focombance**£15.53**3.0★**▲ 346%**](https://www.amazon.co.uk/dp/B0H13XSQ4M) [**FUMIXTEX Carbon Monoxide Detector with LCD Display CO Alarms Replaceable Battery Powered 10 Year Sensor Life Portable CO Detectors for Travel 1 PCS**FUMIXTEX**£10.31**4.6★**▲ 332%**](https://www.amazon.co.uk/dp/B0GCCZCVG6) [**CO2 Monitor Detector**focombance**£14.94**1.0★**▲ 324%**](https://www.amazon.co.uk/dp/B0GMP1WG43) [**CO2 Monitor**focombance**£14.94**3.5★**▲ 143%**](https://www.amazon.co.uk/dp/B0GCHFQG81) [**SONOFF AirGuard CO2 Smart Indoor Air Quality Monitor Matter Compatible 2.4GHz WiFi Carbon Dioxide Detector for CO2/Temp/Humidity Real-Time Display & Alarm for Bedroom Nusery room**SONOFF**£36.12**4.2★**▲ 108%**](https://www.amazon.co.uk/dp/B0G2WDPB29)
**~~View all trending →~~**
## **What buyers say about co2 monitor**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Very good well made product”*
**Value For Money**18%
*“Good value for money”*
**Advertised Vs Actual Product**10%
*“As advertised”*
**Assembly/Installation**9%
*“easy to mount”*
**Ease Of Use**7%
*“Easy to read”*
**Size-Overall**5%
*“Easy fit”*
**Compactness**4%
*“Nice compact size”*
**Efficiency**3%
*“Works ok”*
**Battery Life**3%
*“Works well, battery life decent, lasts at least a day if not a few”*
**Sensor**3%
*“Great value sensor”*
### **What buyers complain about **
**Battery Life**11%
*“then constantly said low battery even when the batteries were changed to new ones”*
**Durability**8%
*“stopped working after 1.5 years of barely being used”*
**Functionality-Overall**8%
*“Stops working too frequently”*
**Instructions/User Manual/Troubleshooting**4%
*“Neat device, poor documentation with incorrect information”*
**Measurement/Reading Accuracy**4%
*“The temperature, HCHO, and HVOC readings seem inaccurate and not of any use”*
**Noise Level**4%
*“LOUD”*
**Size-Overall**4%
*“the backplate did not fit the unit”*
**Ease Of Use**3%
*“Too confusing to operate”*
**Quality-Overall**3%
*“Not great quality control”*
**Alarm/Timer Accuracy**3%
*“Alarm not working”*
### **Top return reasons **
**Functionality-Overall**24%
**Defective Material/Parts**15%
**Alarm/Timer Accuracy**11%
**Battery Life**6%
**Size-Overall**5%
**Touch/Button Controls**3%
**Compatibility-Overall**3%
**Measurement/Reading Accuracy**3%
**Quality-Overall**3%
**Noise Level**3%
## **Common questions**
- **Is co2 monitor profitable to sell on Amazon United Kingdom?**
- The niche generates £86K/yr across 19 tracked products. 2 of 8 products launched in the last 360 days are still selling. 90-day search growth is -31.3%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the co2 monitor niche?**
- 15 brands and 32 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 66% of demand.
- **What do buyers complain about in co2 monitor?**
- Top complaints mined from reviews: Battery Life, Durability, Functionality-Overall. The return rate is 0.6%.
- **When does demand for co2 monitor peak?**
- Demand peaks in Oct–Nov–Dec; the busiest month runs 3.1× the quietest.
- **What does it cost to enter the co2 monitor niche?**
- Listings span £7.58–£55.63; the average listing price is £21.55 (sweet spot $15–$100). The average incumbent carries 2,944 reviews — the moat a new listing must climb.
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