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Product guide

MEXYBE 4-in-1 TDS Water Meter

The MEXYBE 4-in-1 TDS water meter measures TDS, electrical conductivity and temperature in Celsius or Fahrenheit. Its backlit LCD, hold and auto-lock functions are intended to make spot checks easier, while mixed customer feedback about accuracy makes it better suited to tracking changes than treating a reading as a complete water-safety assessment.

At a glance

Measures TDS, EC and temperature in Celsius or Fahrenheit according to the listing.
Backlit display, manual hold, automatic reading lock and two-minute auto-off are described.
Listing says it is factory calibrated and includes ATC.
A TDS chart is said to be printed on the meter, with a further data sheet in the instructions.

Price

$10.79Save 10%

Reference price: ~~$11.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

The listed TDS, EC and temperature functions cover routine comparison checks for household water, RO/DI systems, aquariums and hydroponics.
Backlighting and a hold function can help when reading or recording a result at the water sample.
The seller describes automatic locking after a short stabilization period and automatic shutoff to conserve battery.

Cons

TDS and EC readings do not by themselves identify particular contaminants or establish that water is safe to drink.
Customer feedback reports mixed experiences with accuracy, so avoid relying on a single reading for decisions requiring precise measurements.

Technical specifications

16 specifications

Identity
Brand	MEXYBE

Measurement claims
TDS range	0-9999 ppm
EC range	0-9999 us/cm
Temperature range, Celsius	0.1-80.0 ℃
Temperature range, Fahrenheit	32.0-176.0 °F
Accuracy claimed	± 2% F.S

Display and operation
Screen technology listed	LCD
Display	Larger Backlit LCD Display
Functions	Auto-Lock Function
Temperature compensation	ATC Automatic Temperature Compensation(ATC) for more accurate test results
Auto-off	Auto-Off in 2 Minutes to conserve battery.
Calibration	Factory Calibrated

Dimensions and installation
Weight listed	50 g
Parcel dimensions	16.1 x 3.3 x 1.9 cm; 50 g

Power
Battery requirement	2 LR44 batteries required. (included)
Battery cell type	Manganese

What to know before buying

Listing details to confirm

The title says 0-9990ppm, while the detailed specifications state 0-9999 ppm. The detailed accuracy claim is ± 2% F.S, while the product details differ on dimensions and weight from the parcel listing, and the listing describes the display both as a backlit LCD and an LED screen. Confirm the selected version's exact specifications before purchase. A TDS reading is not a comprehensive contaminant or drinking-water safety test. For use, immerse between the marked lines, stir gently, then allow the reading to stabilize and lock as directed.

Who is it for?

A good fit for

People comparing water readings over time, such as before and after an RO/DI filter.
Aquarium or hydroponics users who want a handheld TDS, EC and temperature spot-check tool.
Home users who value a backlit display and a held reading for recording results.

Less suited to

Anyone needing identification of specific contaminants or a complete drinking-water safety test.
Users who require independently verified precision or a laboratory-grade measurement.

MEXYBE 4-in-1 TDS Water Meter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 564 ratings

5 stars66%66%
4 stars18%18%
3 stars7%7%
2 stars2%2%
1 star7%7%

Customer feedback highlights ease of use, readability and usefulness for comparing water readings, while reports about accuracy are mixed. Those experiences make the meter potentially handy for routine comparisons, but buyers who need dependable precision should treat its readings cautiously and seek a more controlled testing method.

Positive themes

Customers describe it as easy to use and handy.
Feedback praises readability and the ability to notice differences between readings.

Mixed feedback

Customers have mixed opinions about accuracy.

Frequently asked questions

What does this meter measure?

The listing describes TDS, electrical conductivity and temperature readings in Celsius and Fahrenheit. It does not describe a comprehensive test for specific contaminants.

Can it help check an RO or DI filter?

It can compare TDS readings before and after filtration. A reading alone does not establish overall water safety or identify particular substances.

How is a reading taken?

The instructions say to immerse the meter between its marked lines, stir lightly to remove bubbles, and wait for the result to stabilize and lock before recording it.

Are the range and physical specifications consistent?

No. The title gives 0-9990ppm, while detailed text gives 0-9999 ppm. Product dimensions and weight also differ from the parcel details, so confirm the version's specifications.