hydrogen sulfide detector
Skip itSoft demand (-27.1% this quarter) — this niche doesn't clear our bar today.
Avg price
Great$83.90avg listing price — sweet spot $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
Good1,232.25avg incumbent reviews — the moat a new listing must climb
Returns
Okay3.7%return rate — above 5% kills the launch gate
Price range
Okay$17.84–$267.58cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Bad70%top-5 click share — a locked-up shelf
Brand share
Bad92%top-5 brand share — brand-locked demand
Market size
Bad$57K$57K/yr · 13K searches
Growth
Bad-27.1%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, hydrogen sulfide detector is a $57K/yr Amazon United States market (13K searches/yr). The top 5 brands hold 92% of demand. Verdict: Skip it — 35/100.
Data updated Jul 30, 2026 · scored weekly · How we score niches
hydrogen sulfide detector market data
- Units sold / yr
- 500–750
- avg 0–100/product
- Revenue / yr
- $42K–$63K
- units × avg price
- Conversion rate
- 5.2%
- Avg BSR
- #79
- Page quality
- 0%
- Prime
- 88%
- Sponsored
- 94%
- Out of stock
- 24.6%
- Avg brand age
- 50 months
- Avg seller age
- 154 days
Competition & brand share
The top 5 products capture 70% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 rising
Sellers
43
Top-5 brand share
92%
Top 20: 100%
Top-5 click share
70%
Top 20: 100%
Open market
5%
- TOPTES70%
- HAOKESITE12%
- DANOPLUS3%
- BW Technologies3%
- KLEIN TOOLS3%
- FORENSICS DETECTORS FD3%
- Open — no brand owns it (3 brands, 5%)
Demand
Weekly Amazon search volume, last 26 weeks — -27.1% search growth over the last 90 days.Top hydrogen sulfide 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 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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$95.654.2★552 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$37.834.6★3,918 rev
H2S Monitor Clip Single Gas H2S Detector Portable Hydrogen Sulfide Detector Gas Leak Detectors with Buzzer and Red Indicator Alarm Clip on 0~100ppm H2S Gas Detector (Black)
HAOKESITE$59.084.5★6 rev
TopTes Guard-863Pro 4 Gas Monitor Multi Gas Detector for HS CO LEL and O with TFT Color Screen Upgraded O Sensor (5-Year Lifespan) USB Data Export 18h Battery Life Reliable for Work & Home
TOPTES$155.714.5★101 rev
PT199 Natural Gas Leak Detector with Audible & Visual Alarm Portable Gas Sniffer to Locate Combustible Sources Like Methane Propane for Home(Includes Battery x2)-Orange
TOPTES$21.914.6★8,510 rev
Newest
by launch dateH2S Monitor Clip Single Gas H2S Detector Portable Hydrogen Sulfide Detector Gas Leak Detectors with Buzzer and Red Indicator Alarm Clip on 0~100ppm H2S Gas Detector (Black)
HAOKESITE$59.086 rev
TopTes Guard-863Pro 4 Gas Monitor Multi Gas Detector for HS CO LEL and O with TFT Color Screen Upgraded O Sensor (5-Year Lifespan) USB Data Export 18h Battery Life Reliable for Work & Home
TOPTES$155.71101 rev
TopTes PT-830S Rechargeable Gas Leak Detector with 14.5 Inch Flexible Probe Range 0-10000 ppm TFT Color Display & 3 Types Alarm Natural Gas Leak Detector for Propane Methane for Home or Industrial
TOPTES$85.44282 rev
Sooguard H2S Monitor Clip Single Gas H2S Monitor 0~100ppm High-PrecisionH2S Gas Detector Adjustable Alarm Range 3 Alarm Modes Explosion-Proof Safety for Various Working environments (Orange)
Sooguard$54.2614 rev
TOPTES Guard-611 Portable H2S Detector Features a Convenient H2S Monitor Clip on Rechargeable with 5-Day Battery Low Battery Warning Safety Explosion-Proof-Orange
TOPTES$64.80152 rev
Trending
90-day click momentumH2S Monitor Clip Single Gas H2S Detector Portable Hydrogen Sulfide Detector Gas Leak Detectors with Buzzer and Red Indicator Alarm Clip on 0~100ppm H2S Gas Detector (Black)
HAOKESITE$59.084.5★
TopTes Guard-863Pro 4 Gas Monitor Multi Gas Detector for HS CO LEL and O with TFT Color Screen Upgraded O Sensor (5-Year Lifespan) USB Data Export 18h Battery Life Reliable for Work & Home
TOPTES$155.714.5★
Klein Tools ET120 Gas Leak Detector Combustible Gas Leak Tester with 18-Inch Gooseneck Has Range 50-10 000 ppm Includes Pouch Batteries
KLEIN TOOLS$124.664.6★
Sooguard H2S Monitor Clip Single Gas H2S Monitor 0~100ppm High-PrecisionH2S Gas Detector Adjustable Alarm Range 3 Alarm Modes Explosion-Proof Safety for Various Working environments (Orange)
Sooguard$54.264.7★
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★
What buyers say about hydrogen sulfide detector
What buyers praise and complain about, mined from review topics.What buyers love
“Very handy”
“No gas leak”
“As advertised”
“Fair price”
“Looks well made”
“Came in handy twice helping others”
“This detector works very well”
“portability”
“The instructions are clear”
“The battery lasts”
What buyers complain about
“Pin pointed leak”
“could smell it”
“DOESN'T WORK”
“faulty calibration”
“Need better instructions on calibration”
“this monitor is junk”
“didn't last”
“The alarm is loud”
“battery indicator not accurate”
“weak construction”
Top return reasons
Common questions
- Is hydrogen sulfide detector profitable to sell on Amazon United States?
- The niche generates $57K/yr across 16 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -27.1%. Flapen's verdict: Skip it (35/100).
- How competitive is the hydrogen sulfide detector niche?
- 9 brands and 43 sellers compete. The top 5 products take 70% of clicks and top 5 brands hold 92% of demand.
- What do buyers complain about in hydrogen sulfide detector?
- Top complaints mined from reviews: Leak-Proof, Smell, Functionality-Overall. The return rate is 3.7%.
- What does it cost to enter the hydrogen sulfide detector niche?
- Listings span $17.84–$267.58; the average listing price is $83.90 (sweet spot $15–$100). The average incumbent carries 1,232 reviews — the moat a new listing must climb.