Hydrometer
MaybeAn estimated 1.2% of orders come back. But demand is soft, at -12.3% this quarter, so Hydrometer is a Maybe.
- Flapen Score
- 60 / 100Top 32% of 8,839 Patio, Lawn & Garden niches · +4 vs the category median of 5660
- Market size
- $473K/yr365K searches / yr
- 90-day growth
- -12.3%search demand this quarter
- Competition
- 42%top-5 click share · 26 brands · 51 sellers
Flapen Score
Hydrometer against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Hydrometer is stronger. Inside it, weaker.
Market
The Hydrometer market on Amazon at a glance
Shoppers on Amazon United States searched for Hydrometer 365K times last year and spent an estimated $473K. The top 5 brands take 54% of clicks. Flapen scores it 60 out of 100, a Maybe.
01 · Demand
An estimated 10.2% of those searches ended in a purchase.
Shoppers searched for this 365K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 10.2% of those searches ended in a purchase. Searches in the last 90 days moved -12.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $473K a year.
- Searches, last 12 months
- 365K
- Growth, 90 days vs prior 90
- -12.3%
- Conversion, latest week
- 10.2%
- Market size, estimated
- $473Ka year
- Peak month
- January1.3× the quietest month
- Top search term
- hydrometer353K searches a year
02 · Price
A sale here is worth $12.65.
Listings sell for $12.65 on average, from $5.97 to $22.94. Amazon reports units sold in ranges. This niche sold 30K to 40K a year. The average listing sells 1,000 to 1,250 of them. At $12.65 that is $13K to $16K a year per listing.
- Average price
- $12.65under the $15 to $100 sweet spot
- Price range
- $5.97–$22.94
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 30K–40K
- Units per listing a year
- 1,000–1,250
- Revenue per listing a year
- $13K–$16K
- Returns
- 1.2%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
94% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #13 within Thermometers & Weather Instruments. It carries 12,296 reviews at 4.44 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 94%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #13in Thermometers & Weather Instruments
- Average rating
- 4.44 starsAmazon United States average 4.42 stars
- Average reviews
- 12,296per listing
- Listings tracked
- 36
04 · Newcomers
0 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 61 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 61 months
Products
Top Hydrometer products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 15, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Mini Hygrometer Thermometer Digital Humidity Meter Indoor/Outdoor Humidity Monitor Reptile Thermometer for Greenhouse Garden Cellar Fahrenheit()/ Celsius() 2 Pack
- Price
- $5.97
- Rating
- 4.5/5
- Reviews
- 3,331
- Age
- 2y ago

Brewers Elite Hydrometer for Home Brew Beer Wine Mead and Kombucha - Deluxe Triple Scale Set with Hardcase and Cloth - Specific Gravity ABV Tester
- Price
- $13.01
- Rating
- 4.4/5
- Reviews
- 5,544
- Age
- 10y ago

TempPro TP50 Digital Hygrometer Indoor Thermometer Room Thermometer and Humidity Gauge with Temperature Humidity Monitor(Previously ThermoPro)
- Price
- $10.88
- Rating
- 4.6/5
- Reviews
- 154,357
- Age
- 10y ago

6-Pack Mini Hygrometer Indoor Humidity Meter Mini Digital Thermometer Humidity Gauge Meter Indoor Thermometer Hygrometer Monitor Fahrenheit () for Reptile Thermostat Jars Reptile Fridge
- Price
- $8.12
- Rating
- 4.5/5
- Reviews
- 1,920
- Age
- 2y ago

Kosoeur Triple Scale Hydrometer Alcohol Hydrometer for Wine Mead Kombucha & Beer Mead Making Kit (ABV Tester Brix Specific Gravity Hydrometer) Hydrometer Alcohol Kit for Wine Brewing Supplies
- Price
- $10.50
- Rating
- 4.3/5
- Reviews
- 362
- Age
- 2y ago
Trending
estimated 90-day click momentum
Hydrometer for Wine Making with 100 MM Hydrometer Alcohol Test Jar - Specific Gravity Hydrometer for Wine and Beer Making Testing Kit and Brewing Your Own Homebrew
- Price
- $10.02
- Rating
- 4.5/5
- Reviews
- 110
- Age
- 7y ago

AOZ LIbei Hydrometer Set - for Mead Wine Kombucha and Home Brew Beer Alcohol Tester Accessories Moonshine Still Kit Complete for Home Test Equipment-Specific Gravity Abv Tester
- Price
- $22.12
- Rating
- 4.5/5
- Reviews
- 73
- Age
- 2y ago

Hydrometer - Alcohol 0-200 Proof and Tralle
- Price
- $6.73
- Rating
- 4.5/5
- Reviews
- 3,181
- Age
- 17y ago

CIMALAB Triple Scale Hydrometer Specific Gravity Hydrometer for Wine Making Mead Kombucha & Beer Mead Making Kit ABV Tester Brix Tester Hydrometer Alcohol Tester for Wine Making Supplies
- Price
- $10.85
- Rating
- 4.3/5
- Reviews
- 38
- Age
- 11mo ago

JEDEW 4 Pack Hygrometer Thermometer Digital Humidity Meter Indoor/Outdoor Humidity Monitor Reptile Thermo-Hygrometer for Greenhouse Humidors Terrarium Jars Fahrenheit () /Celsius() (4)
- Price
- $9.50
- Rating
- 4.5/5
- Reviews
- 14,792
- Age
- 7y ago
Newest
by launch date
CIMALAB Triple Scale Hydrometer Specific Gravity Hydrometer for Wine Making Mead Kombucha & Beer Mead Making Kit ABV Tester Brix Tester Hydrometer Alcohol Tester for Wine Making Supplies
- Price
- $10.85
- Rating
- 4.3/5
- Reviews
- 38
- Age
- 11mo ago

6 Pack Mini Hygrometer Indoor Humidity Meter Small Digital Thermometer Humidity Gauge Meter Indoor Thermometer Hygrometer Monitor Fahrenheit () for Thermostat Reptile Tank Mason Jars
- Price
- $7.16
- Rating
- 4.5/5
- Reviews
- 1,586
- Age
- 1y ago

WWHAKO 4-Pack Mini Hygrometer Thermometer Indoor Outdoor Round Humidity Meter Small Digital LCD Monitor Thermometer Temperature Gauge Humidity Sensor () or () for Reptile Thermostat Jars
- Price
- $7.94
- Rating
- 4.5/5
- Reviews
- 714
- Age
- 1y ago

Mini Hygrometer Thermometer Digital Humidity Meter Indoor/Outdoor Humidity Monitor Reptile Thermometer for Greenhouse Garden Cellar Fahrenheit()/ Celsius() 2 Pack
- Price
- $5.97
- Rating
- 4.5/5
- Reviews
- 3,331
- Age
- 2y ago

6-Pack Mini Hygrometer Indoor Humidity Meter Mini Digital Thermometer Humidity Gauge Meter Indoor Thermometer Hygrometer Monitor Fahrenheit () for Reptile Thermostat Jars Reptile Fridge
- Price
- $8.12
- Rating
- 4.5/5
- Reviews
- 1,920
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 42% of clicks. Leaders hold, but buyers still shop past them.
Brands
26 rising
Sellers
51
Est. top-5 brand share
54%
Top 20: 96%
Est. top-5 click share
42%
Top 20: 86%
Open market
39%
- Brewer's Elite15%
- TempPro14%
- Serundo Auto10%
- KOSOEUR8%
- ANFBYOH8%
- JEDEW6%
Demand
Hydrometer search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top Hydrometer search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- hydrometer353K/yr
- hydrometers7K/yr
- hydro meter3K/yr
- hidrometro2K/yr
Reviews and returns
What reviews say buyers love and hate about Hydrometer
We read the reviews and the return reasons for every product selling here.
“Little bigger than I wanted”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Hydrometer questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









