Is portable co2 detector profitable to sell on Amazon United States?

The niche generates $128K/yr across 22 tracked products. 5 of 6 products launched in the last 360 days are still selling. 90-day search growth is -22.1%. Flapen's verdict: Skip it (40/100).

How competitive is the portable co2 detector niche?

14 brands and 104 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in portable co2 detector?

Top complaints mined from reviews: Leak-Proof, Durability, Functionality-Overall. The return rate is 2.7%.

When does demand for portable co2 detector peak?

Demand peaks in Jan–Apr; the busiest month runs 2.7× the quietest.

What does it cost to enter the portable co2 detector niche?

Listings span $20.30–$131.88; the average listing price is $43.41 (sweet spot $15–$100). The average incumbent carries 3,668 reviews — the moat a new listing must climb.

portable co2 detector

Skip it

Soft demand (-22.1% this quarter) — this niche doesn't clear our bar today.

Avg price

Incredible$43.41

avg listing price — sweet spot $15–$100

Price range

Good$20.30–$131.88

cheapest to priciest tracked listing — scored on the share inside $15–$100

Returns

Good2.7%

return rate — above 5% kills the launch gate

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Okay61%

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

Conversion

Okay3.0%

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

Brand share

Okay82%

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

Market size

Okay$128K

$128K/yr · 97K searches

Review moat

Okay3,668.05

avg incumbent reviews — the moat a new listing must climb

Growth

Bad-22.1%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, portable co2 detector is a $128K/yr Amazon United States market (97K searches/yr). The top 5 brands hold 82% of demand. Demand peaks in Jan–Apr. Verdict: Skip it — 40/100.

Data updated Jul 30, 2026 · scored weekly · How we score niches

portable co2 detector market data

Units sold / yr: 5K–6K; avg 100–250/product
Revenue / yr: $217K–$260K; units × avg price
Conversion rate: 3.0%
Avg BSR: #32
Page quality: 0%
Prime: 86%
Sponsored: 91%
Out of stock: 7.4%
Avg brand age: 35 months
Avg seller age: 160 days

Competition & brand share

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.

Brands

14 rising

Sellers

104

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

61%

Top 20: 98%

Open market

14%

Kidde46%
TOPTES16%
INKBIRDPLUS11%
Safe T Alert6%
Dienmern4%
Lwyinp3%
Open — no brand owns it (8 brands, 14%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -22.1% search growth over the last 90 days.

Peak months: Jan, Apr · busiest ÷ quietest = 2.7×

Open Trend

Top portable co2 detector search terms

portable co detector28K/yr -28.3%2.1% conv.
portable co2 detector20K/yr -9.9%2.4% conv.
co2 detector portable11K/yr -23.0%2.5% conv.
co detector portable21K/yr -54.9%2.5% conv.
marine carbon monoxide detector5K/yr +115.4%2.9% conv.
mini carbon monoxide detector5K/yr +6.2%2.3% conv.
wireless carbon monoxide detector5K/yr -39.9%2.3% conv.
travel co2 detector portable689/yr -22.7%3.5% conv.
portable smoke and carbon monoxide detector for travel334/yr +39.7%1.2% conv.

All search terms

Top portable co2 detector 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 22 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Kidde Carbon Monoxide Detector AA Battery Powered Portable for Travel or Home 85 dB Alarm LED Status Indicators 3rd Edition

Kidde$22.914.8★1,663 rev

Kidde Carbon Monoxide Detector AA Battery-Powered COB

Kidde$25.644.7★129 rev

TOPTES CT-580 Portable Carbon Monoxide Detector Rechargeable CO Detector with Vibration Visual & Audible Alarms 0-1000PPM TFT Color Display for Home Camping Travel Industrial & Professional Use

TOPTES$57.624.5★650 rev

INKBIRDPLUS Portable CO2 Detector Mini Indoor CO2 Monitor NDIR Sensor with Full Color LCD for Home Office Travel (PTH-10C)

INKBIRDPLUS$39.163.8★223 rev

MTI Industries 62-541-MARINE-WT Detector Marine Co Alarm White

Safe T Alert$71.454.6★59 rev

Newest

by launch date

Air Quality Monitor Indoor 5-in-1 Portable Real-Time CO2 Detector

Lwyinp$25.0616 rev

3w ago

Portable CO2 Detector 4-in-1 Carbon Dioxide Detector for Car with Audible & Visual Alerts Temp/Humidity Sensor Magnetic Back 300H Standby Ideal for Home RV Camping (Black)

Hutehoute$56.551 rev

3mo ago

Kidde Carbon Monoxide Detector AA Battery-Powered COBD

Kidde$31.3019,829 rev

4mo ago

5-in-1 CO2 Carbon Dioxide Detector Dienmern Portable Air Quality Monitor Indoor 1600mAh Powerful Battery CO2 Monitor for CO2/Temp/Humidity LED Display CO2 Detector for Travel/Office/Home/Grow Tents

Dienmern$23.3530 rev

4mo ago

Kidde Carbon Monoxide Detector AA Battery-Powered COB

Kidde$25.64129 rev

5mo ago

What buyers say about portable co2 detector

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

What buyers love

Quality-Overall13%

“The build quality feels solid and durable”

Assembly/Installation12%

“Easy install”

Ease Of Use10%

“Easy to read”

Value For Money10%

“Fair price”

Advertised Vs Actual Product9%

“As described”

Efficiency6%

“Unit works fine”

Battery Life4%

“long battery life”

Sensor3%

“this should be a good sensor”

Size-Overall3%

“the perfect size for traveling”

Portability2%

“It is portable”

What buyers complain about

Leak-Proof11%

“As soon as I put it to where I thought it was leaking”

Durability9%

“Not durable”

Functionality-Overall9%

“does not work properly”

Battery Life7%

“Beeps as battery are low”

Measurement/Reading Accuracy6%

“faulty calibration”

Noise Level5%

“Began beeping”

Quality-Overall4%

“VERY POOR quality control”

Value For Money3%

“these should be way cheaper”

Smell2%

“SNIFF IT: even at small amounts you cant smell”

Advertised Vs Actual Product2%

“False advertising”

Top return reasons

Alarm/Timer Accuracy18%

Functionality-Overall13%

Advertised Vs Actual Product10%

Value For Money9%

Size-Overall7%

Compatibility-Overall6%

Socket/Port/Plug5%

Defective Material/Parts4%

Connectivity-Overall3%

Leak-Proof3%

Common questions

Is portable co2 detector profitable to sell on Amazon United States?: The niche generates $128K/yr across 22 tracked products. 5 of 6 products launched in the last 360 days are still selling. 90-day search growth is -22.1%. Flapen's verdict: Skip it (40/100).
How competitive is the portable co2 detector niche?: 14 brands and 104 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 82% of demand.
What do buyers complain about in portable co2 detector?: Top complaints mined from reviews: Leak-Proof, Durability, Functionality-Overall. The return rate is 2.7%.
When does demand for portable co2 detector peak?: Demand peaks in Jan–Apr; the busiest month runs 2.7× the quietest.
What does it cost to enter the portable co2 detector niche?: Listings span $20.30–$131.88; the average listing price is $43.41 (sweet spot $15–$100). The average incumbent carries 3,668 reviews — the moat a new listing must climb.