sewer gas detector
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$62.21avg listing price — sweet spot $15–$100
Price range
Great$17.84–$124.66cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Conversion
Good5.2%search→purchase rate — share of searches ending in a sale
Review moat
Okay2,477.42avg incumbent reviews — the moat a new listing must climb
Returns
Okay4.0%return rate — above 5% kills the launch gate
Market size
Okay$161K$161K/yr · 50K searches
Growth
Bad-12.2%90-day search growth — must beat 0% to launch
Competition
Bad84%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, sewer gas detector is a $161K/yr Amazon United States market (50K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 37/100.
Data updated Jul 30, 2026 · scored weekly · How we score niches
sewer gas detector market data
- Units sold / yr
- 2K–3K
- avg 100–250/product
- Revenue / yr
- $124K–$156K
- units × avg price
- Conversion rate
- 5.2%
- Avg BSR
- #44
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 92%
- Out of stock
- 0.0%
- Avg brand age
- 66 months
- Avg seller age
- 176 days
Competition & brand share
The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 flat
Sellers
30
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
84%
Top 20: 100%
Open market
0%
- FORENSICS DETECTORS FD46%
- TOPTES30%
- EG19%
- KLEIN TOOLS4%
- TIDOOS1%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -12.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top sewer gas detector search terms
- sewer gas detector31K/yr
- sewer gas leak detector5K/yr
- sewer gas sniffer detector3K/yr
- sewer gas detector for home7K/yr
- sewer gas leak detector for home3K/yr
Top sewer gas 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.
All 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
PT520A Natural Gas Detector Gas Leak Detector with 17-Inch Gooseneck Locating The Source Like Propane Methane and Butane for Home and RV (Includes Battery x3) - Orange
TOPTES$37.834.6★3,918 rev
Sewer Gas Leak Detector by Forensics | 20-Year Sensor | Bathroom Drains Sewage Plumbing |
FORENSICS DETECTORS FD$92.253.9★182 rev
Gas Leak Detector Portable Natural Gas Sniffer for Propane Methane LPG LNG Fuel & Sewer Gas Combustible Gas Detector with 12 Flexible Probe for Home RV Industrial Use
EG$29.014.4★8,976 rev
Sewer Leak Detector | 10ft Drop Test Pass | Upgraded 10-Year Sensor Life | Version 2.0 |
FORENSICS DETECTORS FD$87.724.8★34 rev
Sewer Gas Leak Detector | Super Fast | 10ft Drop Test Pass | Rotten Egg Smell
FORENSICS DETECTORS FD$93.443.1★68 rev
Newest
by launch date
Natural Gas & Propane Leak Detector TIDOOS Gas Leak Detector for Locating the Source of Combustible Gas Leaks (Includes 3 Battery & Storage Bag) - Yellow
TIDOOS$29.3331 rev
TopTes Guard-101 Gas Detector 4 Gas Monitor for H2S CO LEL and O2 with Vibration Visual and Audible Alarms 14h Long Battery Life Safety Explosion-Proof for Work Home - Orange
TOPTES$95.65552 rev
TopTes PT210S Gas Leak Detector Natural Gas Detector with 4-inch Probe Propane Leak Detector Locating Combustible Gases Like Natural Gas Methane for Home Measures%LEL (Incl. Batteries) - Orange
TOPTES$29.361,452 rev
PT520A Natural Gas Detector Gas Leak Detector with 17-Inch Gooseneck Locating The Source Like Propane Methane and Butane for Home and RV (Includes Battery x3) - Orange
TOPTES$37.833,918 rev
Natural Gas Detector TopTes PT177 Gas Leak Detector with Audible & Visual Alarm Portable Gas Sniffer to Locate Combustible Leak Sources Like Methane Propane for Home (Includes Battery x2)-Orange
TOPTES$17.843,812 rev
Trending
90-day click momentumSewer Leak Detector | 10ft Drop Test Pass | Upgraded 10-Year Sensor Life | Version 2.0 |
FORENSICS DETECTORS FD$87.724.8★
Natural Gas & Propane Leak Detector TIDOOS Gas Leak Detector for Locating the Source of Combustible Gas Leaks (Includes 3 Battery & Storage Bag) - Yellow
TIDOOS$29.334.2★
Sewer Gas Leak Detector by Forensics | 20-Year Sensor | Bathroom Drains Sewage Plumbing |
FORENSICS DETECTORS FD$92.253.9★
Natural Gas Detector TopTes PT177 Gas Leak Detector with Audible & Visual Alarm Portable Gas Sniffer to Locate Combustible Leak Sources Like Methane Propane for Home (Includes Battery x2)-Orange
TOPTES$17.844.6★
TopTes PT210S Gas Leak Detector Natural Gas Detector with 4-inch Probe Propane Leak Detector Locating Combustible Gases Like Natural Gas Methane for Home Measures%LEL (Incl. Batteries) - Orange
TOPTES$29.364.7★
What buyers say about sewer gas detector
What buyers praise and complain about, mined from review topics.What buyers love
“Very handy”
“No gas leak”
“As advertised”
“Fair price”
“Good device”
“Came in handy twice helping others”
“The detector worked as advertised”
“The instructions are clear”
“portability”
“It seems accurate”
What buyers complain about
“The leak was in the connection between the gas line”
“could smell it”
“DOESN'T WORK”
“faulty calibration”
“Need better instructions on calibration”
“I have to admit the quality is suspect”
“Meter kept buzzing at the highest level every 15 seconds even when I was outside or down the street”
“didn't last”
“The only criticism is the battery indicator is always reading low”
“weak construction”
Top return reasons
Common questions
- Is sewer gas detector profitable to sell on Amazon United States?
- The niche generates $161K/yr across 12 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -12.2%. Flapen's verdict: Skip it (37/100).
- How competitive is the sewer gas detector niche?
- 5 brands and 30 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in sewer gas detector?
- Top complaints mined from reviews: Leak-Proof, Smell, Functionality-Overall. The return rate is 4.0%.
- When does demand for sewer gas detector peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the sewer gas detector niche?
- Listings span $17.84–$124.66; the average listing price is $62.21 (sweet spot $15–$100). The average incumbent carries 2,477 reviews — the moat a new listing must climb.