tds meter
Worth a lookShows searches that convert (11.6% search→purchase), but a concentrated shelf (top 5 take 86% of clicks) keeps it on the watch list.
Conversion
Great11.6%search→purchase rate — share of searches ending in a sale
Market size
Great$1.8M$1.8M/yr · 1.3M searches
Returns
Great1.6%return rate — above 5% kills the launch gate
Avg price
Good$12.43avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Price range
Good$5.24–$25.61cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Bad4,969.91avg incumbent reviews — the moat a new listing must climb
Brand share
Bad91%top-5 brand share — brand-locked demand
Growth
Bad-9.9%90-day search growth — must beat 0% to launch
Competition
Bad86%top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, tds meter is a $1.8M/yr Amazon United States market (1.3M searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Apr–May–Jul. Verdict: Worth a look — 50/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
tds meter market data
- Units sold / yr
- 150K–200K
- avg 15,000–20,000/product
- Revenue / yr
- $1.9M–$2.5M
- units × avg price
- Conversion rate
- 11.6%
- Avg BSR
- #3
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 82%
- Out of stock
- 0.8%
- Avg brand age
- 55 months
- Avg seller age
- 171 days
Competition & brand share
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.Brands
9 flat
Sellers
29
Top-5 brand share
91%
Top 20: 100%
Top-5 click share
86%
Top 20: 100%
Open market
6%
- MEXYBE37%
- Craft91128%
- VARIFY17%
- bestprod5%
- HM Digital4%
- VIVOSUN3%
- Open — no brand owns it (3 brands, 6%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -9.9% search growth over the last 90 days.Peak months: Apr, May, Jul · busiest ÷ quietest = 2.1×
Top tds meter search terms
- tds meter267K/yr
- water tester for drinking water313K/yr
- water tester191K/yr
- tds meter digital water tester115K/yr
- water quality tester51K/yr
- tds water tester47K/yr
- digital water tester42K/yr
- digital water tester for drinking water36K/yr
- ppm meter34K/yr
- tds28K/yr
Top tds meter 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
2025 All-New 4 in 1 Tds Meter Digital Water Tester - Accurate and Reliable TDS EC & Temp(C F) Meter - 0-9999ppm - Professional Testing for Drinking Water RO/DI System Aquariums etc
MEXYBE$8.944.4★6,037 rev
Craft911 Water Tester for Drinking Water - TDS Meter
Craft911$9.774.4★2,830 rev
Instant 4-in-1 TDS Meter Digital Water Tester for Drinking Water | Accurate 09990 PPM EC & Temp Readings | Ideal for RO Systems Aquariums Pools Built for Professionals Easy for Anyone
VARIFY$9.804.5★1,451 rev
Bestprod All-New 21 in 1 Drinking Water Testing Kit Strips Home Tap and Well Water Test Kit for Hardness Lead Iron Copper Chlorine Fluoride
bestprod$25.614.4★3,520 rev
HM Digital TDS-3 Handheld TDS Meter With Carrying Case 0 - 9990 ppm TDS Measurement Range 1 ppm Resolution +/- 2% Readout Accuracy
HM Digital$14.404.7★1,821 rev
Newest
by launch date
4 in 1 Digital Water Quality Tester - TDS/EC/TemperatureC/FTDS Meter | 0-9999 ppm | Accurate and Professional for Drinking Water Hydroponics Aquariums RO Systems Pool 2025 NEW
EKOOTIMO$6.55399 rev
Instant 4-in-1 TDS Meter Digital Water Tester for Drinking Water | Accurate 09990 PPM EC & Temp Readings | Ideal for RO Systems Aquariums Pools Built for Professionals Easy for Anyone
VARIFY$9.801,451 rev
Craft911 Water Tester for Drinking Water - TDS Meter
Craft911$9.772,830 rev
New 4 in 1 TDS Meter TDS Meter Digital Water Tester Accurate and Reliable Water Tester TDS EC and Temperature ( C/ F) Meter 0-9990ppm Used for Drinking Water and RO/DI Systems
Arendsace$6.511,314 rev
TDS Water Tester Drinking Water Tester 0-9990 PPM Meter Water Quality Tester Portable Water Tester for Drinking Water TDS Meter Digital Water Tester 1 Pack Deep Blue
Pmlilb$9.911,244 rev
Trending
90-day click momentum
Tds Meter Digital Water Tester - Affordable & Reliable Water Testing Kits for Drinking Water - 0-9990ppm - 1s Get Accurate Reasult for Home Well Tap Water Quality Test and More!
MEXYBE$5.244.5★
HM Digital TDS-3 Handheld TDS Meter With Carrying Case 0 - 9990 ppm TDS Measurement Range 1 ppm Resolution +/- 2% Readout Accuracy
HM Digital$14.404.7★
Instant 4-in-1 TDS Meter Digital Water Tester for Drinking Water | Accurate 09990 PPM EC & Temp Readings | Ideal for RO Systems Aquariums Pools Built for Professionals Easy for Anyone
VARIFY$9.804.5★
Craft911 Water Tester for Drinking Water - TDS Meter
Craft911$9.774.4★
Varify 17in1 Complete Drinking Water Test Kit - 100 Strips + 2 Bacteria Tester Kits - Well Tap Home City Water Testing Strip for Lead Alkaline Chlorine Hardness Iron Fluoride Copper & More
VARIFY$25.334.3★
What buyers say about tds meter
What buyers praise and complain about, mined from review topics.What buyers love
“easy to follow”
“The build quality feels solid”
“Worth the price”
“Worked as advertised”
“Very Helpful for Water Testing”
“It really does work”
“Instructions are clear”
“The good- you can compare filters”
“The display is bright”
“This 4-in-1 meter is designed to analyze water purity quickly and easily”
What buyers complain about
“DID NOT WORK”
“Inaccurate readings the quality is not good”
“Colors are a bit confusing”
“Does not accurately reflect whats in the water”
“False advertisement”
“Broke within a week”
“difficult to read”
“Save your money and buy something else”
“This is definitely not a good indicator as to whether you should drink your water or get a filtration system or not”
“Batteries deaf when I received it”
Top return reasons
Common questions
- Is tds meter profitable to sell on Amazon United States?
- The niche generates $1.8M/yr across 11 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -9.9%. Flapen's verdict: Worth a look (50/100).
- How competitive is the tds meter niche?
- 9 brands and 29 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 91% of demand.
- What do buyers complain about in tds meter?
- Top complaints mined from reviews: Functionality-Overall, Quality-Overall, Color. The return rate is 1.6%.
- When does demand for tds meter peak?
- Demand peaks in Apr–May–Jul; the busiest month runs 2.1× the quietest.
- What does it cost to enter the tds meter niche?
- Listings span $5.24–$25.61; the average listing price is $12.43 (sweet spot $15–$100). The average incumbent carries 4,970 reviews — the moat a new listing must climb.