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.

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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

Product ID: 44553954

💡Backlit LCD with auto-lock display

📊3-in-1 TDS, EC & Temp measurement

⚙️Titanium alloy probe for precision

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€ 29.81

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Description

💧 Stay ahead of water quality—because your health deserves precision.

SMART AUTO OFF - Energy-saving auto shut-off after 2 minutes of inactivity keeps your device ready when you need it.
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 water analysis.
PRECISION YOU CAN TRUST - Premium titanium alloy probe ensures lab-grade accuracy for your water quality checks.
VERSATILE WATER MONITORING - 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 TDS, Electrical Conductivity, and Temperature (°F/°C) with a wide range up to 9990 ppm. Designed for ease of use, it includes a large backlit LCD with auto-lock and auto shut-off features. Ideal for professionals and enthusiasts monitoring drinking water purity, RO/DI systems, aquariums, hydroponics, pools, and spas.

Specifications

ASIN	B073713G5F
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#4,811 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #185 in Pool Chemicals & Water Testing Products
Color	White
Customer Reviews	4.5 4.5 out of 5 stars (16,377)
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)

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 29.81

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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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

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