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.

co2 monitor

Worth a look

Shows low returns (0.6%), but soft demand (-31.3% this quarter) keeps it on the watch list.

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Avg price

Great£21.55

avg listing price — sweet spot $15–$100

Quality gap

Great4.1★

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

Good66%

top-5 brand share — brands hold most of the demand

Conversion

Okay3.7%

search→purchase rate — share of searches ending in a sale

Competition

Okay62%

top-5 click share — leaders hold, buyers still browse

Review moat

Okay2,943.68

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

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

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

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.

Peak months: Oct, Nov, Dec · busiest ÷ quietest = 3.1×

Open Trend

Top co2 monitor search terms

co2 monitor48K/yr -34.0%3.5% conv.
carbon dioxide detector24K/yr -23.3%6.1% conv.
carbon dioxide monitor13K/yr -37.6%3.7% conv.
co2 meter6K/yr -33.6%2.5% conv.
co2 sensor4K/yr -22.3%2.1% conv.
co2 detectors3K/yr +2.6%2.5% conv.
c02 monitor4K/yr -49.0%5.0% conv.
co2 monitor for home4K/yr -30.1%8.1% conv.
carbon dioxide2K/yr -26.6%3.5% conv.

All 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.

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

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£44.884.5★1,113 rev

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£11.944.7★9,145 rev

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£14.433.4★13 rev

Kidde 5CO Carbon Monoxide Alarm and Detector with AA Batteries - 10 Year Sensor Life CO Alarm for Home

Kidde£11.084.6★33,828 rev

Temtop CO2 Monitor Indoor Air Quality Monitor Portable Carbon Dioxide Detector CO2 Temperature Humidity Meter for Home Office School

Temtop£43.214.4★766 rev

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£15.538 rev

2mo ago

CO2 Monitor

focombance£14.942 rev

3mo ago

CO2 Monitor Detector

focombance£14.941 rev

5mo ago

FUMIXTEX Carbon Monoxide Detector with LCD Display CO Alarms Replaceable Battery Powered 10 Year Sensor Life Portable CO Detectors for Travel 1 PCS

FUMIXTEX£10.3155 rev

7mo ago

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£36.12135 rev

8mo ago

What buyers say about co2 monitor

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall18%

“Very good well made product”

Value For Money18%

“Good value for money”

Advertised Vs Actual Product10%

“As advertised”

Assembly/Installation9%

“easy to mount”

Ease Of Use7%

“Easy to read”

Size-Overall5%

“Easy fit”

Compactness4%

“Nice compact size”

Efficiency3%

“Works ok”

Battery Life3%

“Works well, battery life decent, lasts at least a day if not a few”

Sensor3%

“Great value sensor”

What buyers complain about

Battery Life11%

“then constantly said low battery even when the batteries were changed to new ones”

Durability8%

“stopped working after 1.5 years of barely being used”

Functionality-Overall8%

“Stops working too frequently”

Instructions/User Manual/Troubleshooting4%

“Neat device, poor documentation with incorrect information”

Measurement/Reading Accuracy4%

“The temperature, HCHO, and HVOC readings seem inaccurate and not of any use”

Noise Level4%

“LOUD”

Size-Overall4%

“the backplate did not fit the unit”

Ease Of Use3%

“Too confusing to operate”

Quality-Overall3%

“Not great quality control”

Alarm/Timer Accuracy3%

“Alarm not working”

Top return reasons

Functionality-Overall24%

Defective Material/Parts15%

Alarm/Timer Accuracy11%

Battery Life6%

Size-Overall5%

Touch/Button Controls3%

Compatibility-Overall3%

Measurement/Reading Accuracy3%