What kind of battery does it have?

1 x 3V button battery CR2032 , it's included in the water tester. Sincerely hope you enjoy the products we sell on Amazon!

how can i test if the unit is accurate could i use distilled which i assume should be zero, thanks tom

Thanks for your question. This TDS meter is pre-calibrated in factory, no need calibrate again by customer, we do this to prevent as many calibration related mistakes as possible, and it's easier to use. To maintain the accuracy, it's better to rinse the probe with distilled water after each use. For your mentioned distilled water, it should read 0 ppm theoretically, but in actual application, if you can't keep test condition very clean, it may read 0-2ppm usually.

Can this also check for ph ?

It Does not. It measure TDS , EC and Temperature 3 in 1. PH Meter is another tester.

Has anyone else experienced this reading into the hundreds on very low ppm water after a couple weeks of use? solutions?

Are you rinsing the probe with distilled water after each use and patting it dry, if not, dried solids will build up on the probe and render the measurements inaccurate.

Honeforest Tds Meter Digital Water Tester Accurate And Reliable Measures

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

💧 Stay ahead of impurities with precision water testing at your fingertips!

EFFORTLESS READINGS - Large backlit LCD with auto-lock function delivers instant, easy-to-read results—even in low light.
TRIPLE ACTION TESTING - Simultaneously measures Total Dissolved Solids, Electrical Conductivity, and Temperature for comprehensive insights.
PRECISION YOU CAN TRUST - Premium titanium alloy probe ensures lab-grade accuracy for your water quality checks.
SMART AUTO OFF PORTABILITY - Saves battery with 2-minute auto shutoff; compact and lightweight for on-the-go testing and peace of mind.
VERSATILE WATER QUALITY MONITOR - Perfect for drinking water, RO/DI systems, aquariums, hydroponics, pools, and spas—stay ahead of contamination risks.

The HoneForest TDS Meter is a compact, battery-powered digital water tester featuring a premium titanium alloy probe and intelligent chip for highly accurate measurements. It offers 3-in-1 functionality measuring Total Dissolved Solids (0-9990 ppm), Electrical Conductivity, and Temperature (°F/°C) with a large backlit LCD and auto-lock display. Designed for diverse applications including drinking water, RO/DI systems, aquariums, hydroponics, pools, and spas, it provides fast, reliable readings with smart auto-off to conserve power. Lightweight and portable, it comes with a leather carrying case and is backed by strong customer satisfaction and after-sales support.

Specifications

ASIN	B073713G5F
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#3,006 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #88 in Pool Chemicals & Water Testing Products
Color	White
Customer Reviews	4.5 4.5 out of 5 stars (16,312)
Date First Available	May 31, 2017
Display Style	LCD
Included Components	1 x TDS Meter, 1 x Instruction, 1 x portable leather bag, 1x color box
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	1.62 ounces
Item model number	HFTDS-M7
Manufacturer	HoneForest
Material	Plastic
Part Number	HFTDS-M7
Power Source	Battery Powered
Product Dimensions	6.29 x 1.14 x 0.59 inches
Size	6.29 x 1.14 x 0.59 inches (160x29x15mm)

Reviews

U**R

28.02.2026

D**D

20.04.2026

A**R

22.02.2026

A**R

21.04.2026

I**S

25.04.2026

S**L

9.03.2026

A**R

9.04.2026

J**R

25.03.2026

M**A

28.01.2026

D**K

9.09.2025

L**E

18.05.2025

N**N

3.02.2024

N**F

9.11.2024

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HoneForest TDS Meter, Digital Water Tester - Accurate and Reliable, Measures TDS, EC & Temperature (°F/°C), 0-9990ppm, Water Test Meter for Drinking Water, RO/DI System, Aquariums, etc​​

Description

Specifications

Reviews

Common Questions

HoneForest TDS Meter, Digital Water Tester - Accurate and Reliable, Measures TDS, EC & Temperature (°F/°C), 0-9990ppm, Water Test Meter for Drinking Water, RO/DI System, Aquariums, etc