Coolant Refractometer
FailDemand is soft, at -21.8% this quarter, so Coolant Refractometer is a Fail.
- Flapen Score
- 49 / 100Ranks 3,500 of 7,287 Automotive niches · on the category median49
- Market size
- $169K/yr54K searches / yr
- 90-day growth
- -21.8%search demand this quarter
- Competition
- 67%top-5 click share · 15 brands · 60 sellers
Flapen Score
Coolant Refractometer against its category
The dotted line is the Automotive average. Past it, Coolant Refractometer is stronger. Inside it, weaker.
Market
The Coolant Refractometer market on Amazon at a glance
Shoppers on Amazon United States searched for Coolant Refractometer 54K times last year and spent an estimated $169K. The top 5 brands take 77% of clicks. Flapen scores it 49 out of 100, a Fail.
01 · Demand
An estimated 8.0% of those searches ended in a purchase.
Shoppers searched for this 54K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 8.0% of those searches ended in a purchase. Searches in the last 90 days moved -21.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $169K a year.
- Searches, last 12 months
- 54K
- Growth, 90 days vs prior 90
- -21.8%
- Conversion, latest week
- 8.0%
- Market size, estimated
- $169Ka year
- Top search term
- coolant refractometer11K searches a year
02 · Price
A sale here is worth $39.45.
Listings sell for $39.45 on average, from $11.18 to $139.04. Amazon reports units sold in ranges. This niche sold 4K to 5K a year. The average listing sells 100 to 250 of them. At $39.45 that is $4K to $10K a year per listing.
- Average price
- $39.45inside the $15 to $100 sweet spot
- Price range
- $11.18–$139.04
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 4K–5K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $4K–$10K
- Returns
- 1.5%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
89% 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 #79 within Oils & Fluids. It carries 260 reviews at 4.53 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 89%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #79in Oils & Fluids
- Average rating
- 4.53 starsAmazon United States average 4.42 stars
- Average reviews
- 260per listing
- Listings tracked
- 18
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 72 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
- 72 months
Products
Top Coolant Refractometer 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 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
4-in-1 DEF Antifreeze Coolant Refractometer for Automobile Antifreeze System Diesel Exhaust Fluid Battery Acid and Windshield Washer Fluid
- Price
- $21.47
- Rating
- 4.6/5
- Reviews
- 1,345
- Age
- 8y ago

DEF Refractometer for Measuring Diesel Exhaust Fluid Concentration of Diesel Engines
- Price
- $23.67
- Rating
- 4.6/5
- Reviews
- 731
- Age
- 8y ago

TRZ 4-in-1 Antifreeze Refractometer Ethylene Glycol Propylene Glycol in Antifreeze Freezing Point Temperature and Concentration AdBlue DEF and Industrial Battery Fluid
- Price
- $22.32
- Rating
- 4.6/5
- Reviews
- 460
- Age
- 8y ago

3-in-1 Antifreeze Tester in Fahrenheit Scale for Checking Freezing Point and Concentration of Ethylene Glycol or Propylene Glycol Based Automobile Antifreeze Coolant Also for Battery Acid Condition
- Price
- $21.56
- Rating
- 4.6/5
- Reviews
- 297
- Age
- 9y ago

OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer Kit - Includes Refractometer Dropper Lens Wipe Cloth Instructions and Quick Start Guide Screwdriver and Case
- Price
- $117.69
- Rating
- 4.8/5
- Reviews
- 356
- Age
- 15y ago
Trending
estimated 90-day click momentum
Performance Tool W80158 Multifunction Refractometer - Brix Scale Measures DEF Ethylene Glycol Propylene Glycol Battery Fluid Anti-Freeze Brewing Beer Making Wine and More
- Price
- $59.41
- Rating
- 4.8/5
- Reviews
- 7
- Age
- 10y ago

Antifreeze Refractometer Antifreeze Coolant Tester for Checking Antifreeze Freezing Point Concentration of Ethylene Glycol & Propylene Glycol Battery Acid Condition Windshield Washer Fluid
- Price
- $11.18
- Rating
- 4.3/5
- Reviews
- 3
- Age
- 1y ago

AMTAST DEF Refractometer 0-40% AdBlue Diesel Exhaust Fluid Urea Concentration Refractometer Hand Held Refractometer with ATC for Automotive Diesel Made of Copper Not Cheap Aluminum (Model AMR001)
- Price
- $25.57
- Rating
- 4.6/5
- Reviews
- 174
- Age
- 6y ago

Antifreeze Refractometer VRESOURCING Hand-Held Anti Freeze Tester for Car Coolant Adblue Antifreeze System Glycol Propylene Glycol Ethylene Battery Acid Coolant Windshield Fluid
- Price
- $15.09
- Rating
- 4.4/5
- Reviews
- 246
- Age
- 8y ago

BRWISSEN Digital Refractometer 5-in-1 Antifreeze Coolant Diesel Exhaust Fluid DEF Tester - Urea Concentration Antifreeze & Car Windshield Washer Fluid Freeze Point Detector
- Price
- $139.04
- Rating
- 4.8/5
- Reviews
- 10
- Age
- 2y ago
Newest
by launch date
5-in-1 Refractometer for DEF Urea Concentration Windshield Washer & PG/EG Antifreeze Freeze Point Battery Specific Gravity - Refractometer for Coolant Antifreeze and Diesel Fluid
- Price
- $20.06
- Rating
- 4.2/5
- Reviews
- 24
- Age
- 9mo ago

Antifreeze Refractometer Antifreeze Coolant Tester for Checking Antifreeze Freezing Point Concentration of Ethylene Glycol & Propylene Glycol Battery Acid Condition Windshield Washer Fluid
- Price
- $11.18
- Rating
- 4.3/5
- Reviews
- 3
- Age
- 1y ago

4-in-1 Refractometer for Ethylene & Propylene Glycol Antifreeze DEF Battery Acid & Windshield Fluid Accurate ATC Tester with C Scale for Coolant Freezing Point & SRFI Automotive & Industrial Use
- Price
- $19.55
- Rating
- 4.7/5
- Reviews
- 16
- Age
- 1y ago

5-in-1 DEF Antifreeze Refractometer Coolant Tester with ATC Hydrometer Kit for Automotive Antifreeze Diesel Exhaust Fluid Ethylene Glycol or Propylene Glycol Based Windshield Washer Fluid Battery Acid
- Price
- $21.72
- Rating
- 4.6/5
- Reviews
- 46
- Age
- 1y ago

BRWISSEN Digital Refractometer 5-in-1 Antifreeze Coolant Diesel Exhaust Fluid DEF Tester - Urea Concentration Antifreeze & Car Windshield Washer Fluid Freeze Point Detector
- Price
- $139.04
- Rating
- 4.8/5
- Reviews
- 10
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 67% of clicks. Leaders hold, but buyers still shop past them.
Brands
15 rising
Sellers
60
Est. top-5 brand share
77%
Top 20: 100%
Est. top-5 click share
67%
Top 20: 100%
Open market
20%
- aichose50%
- TRZ12%
- Performance Tool6%
- OTC5%
- AMTAST4%
- Anbachi4%
Demand
Coolant Refractometer search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Dec · busiest ÷ quietest = 2.3× · 8 of 12 months tracked
Search terms
Top Coolant Refractometer search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- coolant refractometer11K/yr
- def refractometer11K/yr
- def tester8K/yr
- glycol refractometer7K/yr
- refractometer coolant4K/yr
- def fluid tester5K/yr
- antifreeze refractometer4K/yr
- glycol tester3K/yr
Reviews and returns
What reviews say buyers love and hate about Coolant Refractometer
We read the reviews and the return reasons for every product selling here.
“box are very cheap”
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.
17 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 Coolant Refractometer 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









