---
title: "Hydrogen Sulfide Detector — $57K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/hydrogen-sulfide-detector"
last_updated: "2026-08-09T13:08:32.753Z"
locale: en
meta:
description: "Niche score 35/100 · $57K/yr market · 13K searches/yr · $83.90 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 35/100 · $57K/yr market · 13K searches/yr · $83.90 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Hydrogen Sulfide Detector — $57K/yr Amazon US Niche (2026) - Flapen"
---
# **hydrogen sulfide detector**
**Skip it**
Soft demand (-27.1% this quarter) — this niche doesn't clear our bar today.
Market size 14Growth 11Conversion 60Competition 25Returns 41Price range 33Avg price 81Brand share 20Review moat 57Quality gap 70
**Avg price**
**Great****$83.90**
avg listing price — sweet spot $15–$100
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****5.2%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****1,232.25**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Okay****3.7%**
return rate — above 5% kills the launch gate
**Price range**
**Okay****$17.84–$267.58**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Bad****70%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****92%**
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
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
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 ~~](https://flapen.com/research/methodology)
## **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.
500300Spike '26Feb '26Mar '26Mar '26Apr '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/hydrogen-sulfide-detector/trend)
## **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.
0%10%$6K20%$11K30%$17K40%$23K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**$95.65**4.2★552 rev](https://www.amazon.com/dp/B0D7C8BJL1) [2**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**$37.83**4.6★3,918 rev](https://www.amazon.com/dp/B0BTM3G8DK) [3**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**$59.08**4.5★6 rev](https://www.amazon.com/dp/B0GW78XMHX) [4**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**$155.71**4.5★101 rev](https://www.amazon.com/dp/B0GFV373JJ) [5**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**$21.91**4.6★8,510 rev](https://www.amazon.com/dp/B0B62LBZPC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**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**$59.08**6 rev3mo ago](https://www.amazon.com/dp/B0GW78XMHX) [**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**$155.71**101 rev6mo ago](https://www.amazon.com/dp/B0GFV373JJ) [**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**$85.44**282 rev1y ago](https://www.amazon.com/dp/B0DF71BXCD) [**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**$54.26**14 rev1y ago](https://www.amazon.com/dp/B0DGB48ZHZ) [**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**$64.80**152 rev1y ago](https://www.amazon.com/dp/B0DHGBGCM6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$59.08**4.5★**▲ 239%**](https://www.amazon.com/dp/B0GW78XMHX) [**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**$155.71**4.5★**▲ 205%**](https://www.amazon.com/dp/B0GFV373JJ) [**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**$124.66**4.6★**▲ 173%**](https://www.amazon.com/dp/B074NBJ8XP) [**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**$54.26**4.7★**▲ 132%**](https://www.amazon.com/dp/B0DGB48ZHZ) [**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**$17.84**4.6★**▲ 119%**](https://www.amazon.com/dp/B0BQYQZF22)
**~~View all trending →~~**
## **What buyers say about hydrogen sulfide detector**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**20%
*“Very handy”*
**Leak-Proof**14%
*“No gas leak”*
**Advertised Vs Actual Product**14%
*“As advertised”*
**Value For Money**12%
*“Fair price”*
**Quality-Overall**9%
*“Looks well made”*
**Efficiency**6%
*“Came in handy twice helping others”*
**Sensor**4%
*“This detector works very well”*
**Portability**2%
*“portability”*
**Instructions/User Manual/Troubleshooting**2%
*“The instructions are clear”*
**Battery Life**1%
*“The battery lasts”*
### **What buyers complain about **
**Leak-Proof**33%
*“Pin pointed leak”*
**Smell**11%
*“could smell it”*
**Functionality-Overall**10%
*“DOESN'T WORK”*
**Measurement/Reading Accuracy**4%
*“faulty calibration”*
**Instructions/User Manual/Troubleshooting**3%
*“Need better instructions on calibration”*
**Quality-Overall**3%
*“this monitor is junk”*
**Durability**2%
*“didn't last”*
**Noise Level**2%
*“The alarm is loud”*
**Battery Life**2%
*“battery indicator not accurate”*
**Strength**2%
*“weak construction”*
### **Top return reasons **
**Functionality-Overall**29%
**Leak-Proof**15%
**Value For Money**8%
**Advertised Vs Actual Product**7%
**Measurement/Reading Accuracy**6%
**Alarm/Timer Accuracy**5%
**Compatibility-Overall**4%
**Defective Material/Parts**3%
**Quality-Overall**3%
**Size-Overall**3%
## **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.
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