---
title: "Portable Co2 Detector — $128K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/portable-co2-detector"
last_updated: "2026-08-08T18:30:41.008Z"
locale: en
meta:
description: "Niche score 40/100 · $128K/yr market · 97K searches/yr · $43.41 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 40/100 · $128K/yr market · 97K searches/yr · $43.41 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Portable Co2 Detector — $128K/yr Amazon US Niche (2026) - Flapen"
---
# **portable co2 detector**
**Skip it**
Soft demand (-22.1% this quarter) — this niche doesn't clear our bar today.
Market size 29Growth 14Conversion 38Competition 39Returns 58Price range 71Avg price 95Brand share 38Review moat 28Quality gap 48
**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**
**Good****2.7%**
return rate — above 5% kills the launch gate
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****61%**
top-5 click share — leaders hold, buyers still browse
**Conversion**
**Okay****3.0%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****82%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$128K**
$128K/yr · 97K searches
**Review moat**
**Okay****3,668.05**
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 ~~](https://flapen.com/research/methodology)
## **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.
9K7KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Apr · busiest ÷ quietest = 2.7×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/portable-co2-detector/trend)
## **Top portable co2 detector search terms**
- **portable co detector**28K/yr-28.3%2.1% conv. - **portable co2 detector**20K/yr-9.9%2.4% conv. - **co2 detector portable**11K/yr-23.0%2.5% conv. - **co detector portable**21K/yr-54.9%2.5% conv. - **marine carbon monoxide detector**5K/yr+115.4%2.9% conv. - **mini carbon monoxide detector**5K/yr+6.2%2.3% conv. - **wireless carbon monoxide detector**5K/yr-39.9%2.3% conv. - **travel co2 detector portable**689/yr-22.7%3.5% conv. - **portable smoke and carbon monoxide detector for travel**334/yr+39.7%1.2% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/portable-co2-detector/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.
0%10%$13K20%$26K30%$39K40%$51K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Kidde Carbon Monoxide Detector AA Battery Powered Portable for Travel or Home 85 dB Alarm LED Status Indicators 3rd Edition**Kidde**$22.91**4.8★1,663 rev](https://www.amazon.com/dp/B0DT1MGCKK) [2**Kidde Carbon Monoxide Detector AA Battery-Powered COB**Kidde**$25.64**4.7★129 rev](https://www.amazon.com/dp/B0G1CR88J9) [3**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**$57.62**4.5★650 rev](https://www.amazon.com/dp/B0DGLFL7K8) [4**INKBIRDPLUS Portable CO2 Detector Mini Indoor CO2 Monitor NDIR Sensor with Full Color LCD for Home Office Travel (PTH-10C)**INKBIRDPLUS**$39.16**3.8★223 rev](https://www.amazon.com/dp/B0CF26PLJR) [5**MTI Industries 62-541-MARINE-WT Detector Marine Co Alarm White**Safe T Alert**$71.45**4.6★59 rev](https://www.amazon.com/dp/B01FYYZU8S)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Air Quality Monitor Indoor 5-in-1 Portable Real-Time CO2 Detector**Lwyinp**$25.06**16 rev3w ago](https://www.amazon.com/dp/B0H6W2C3WC) [**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**$56.55**1 rev3mo ago](https://www.amazon.com/dp/B0GYJ412FG) [**Kidde Carbon Monoxide Detector AA Battery-Powered COBD**Kidde**$31.30**19,829 rev4mo ago](https://www.amazon.com/dp/B0G1CQ4S2Z) [**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**$23.35**30 rev4mo ago](https://www.amazon.com/dp/B0GTB442ND) [**Kidde Carbon Monoxide Detector AA Battery-Powered COB**Kidde**$25.64**129 rev5mo ago](https://www.amazon.com/dp/B0G1CR88J9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$56.55**5.0★**▲ 86%**](https://www.amazon.com/dp/B0GYJ412FG) [**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**$23.35**3.0★**▲ 85%**](https://www.amazon.com/dp/B0GTB442ND) [**Air Quality Monitor Indoor 5-in-1 Portable Real-Time CO2 Detector**Lwyinp**$25.06**4.5★**▲ 85%**](https://www.amazon.com/dp/B0H6W2C3WC) [**Kidde Carbon Monoxide Detector AA Battery-Powered COB**Kidde**$25.64**4.7★**▲ 83%**](https://www.amazon.com/dp/B0G1CR88J9) [**Kidde Carbon Monoxide Detector Plug-in & AA Battery Backup COP**Kidde**$34.76**4.8★**▲ 82%**](https://www.amazon.com/dp/B0G1CPTKNQ)
**~~View all trending →~~**
## **What buyers say about portable co2 detector**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**13%
*“The build quality feels solid and durable”*
**Assembly/Installation**12%
*“Easy install”*
**Ease Of Use**10%
*“Easy to read”*
**Value For Money**10%
*“Fair price”*
**Advertised Vs Actual Product**9%
*“As described”*
**Efficiency**6%
*“Unit works fine”*
**Battery Life**4%
*“long battery life”*
**Sensor**3%
*“this should be a good sensor”*
**Size-Overall**3%
*“the perfect size for traveling”*
**Portability**2%
*“It is portable”*
### **What buyers complain about **
**Leak-Proof**11%
*“As soon as I put it to where I thought it was leaking”*
**Durability**9%
*“Not durable”*
**Functionality-Overall**9%
*“does not work properly”*
**Battery Life**7%
*“Beeps as battery are low”*
**Measurement/Reading Accuracy**6%
*“faulty calibration”*
**Noise Level**5%
*“Began beeping”*
**Quality-Overall**4%
*“VERY POOR quality control”*
**Value For Money**3%
*“these should be way cheaper”*
**Smell**2%
*“SNIFF IT: even at small amounts you cant smell”*
**Advertised Vs Actual Product**2%
*“False advertising”*
### **Top return reasons **
**Alarm/Timer Accuracy**18%
**Functionality-Overall**13%
**Advertised Vs Actual Product**10%
**Value For Money**9%
**Size-Overall**7%
**Compatibility-Overall**6%
**Socket/Port/Plug**5%
**Defective Material/Parts**4%
**Connectivity-Overall**3%
**Leak-Proof**3%
## **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.
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