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 Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.

HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.

Product ID: 266500156

⚡0-9990 ppm ultra-wide TDS range

💡Backlit LCD with color-coded purity alerts

🌡️Auto Temperature Compensation (ATC)

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₩76685

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

WORRY FREE OWNERSHIP - 3-year warranty + 90-day money-back guarantee for total peace of mind.
PRECISION YOU CAN TRUST - Titanium alloy probe + ATC ensures lab-grade accuracy every time.
ALL IN ONE WATER QUALITY GURU - TDS, EC & Temperature combined in one sleek, ergonomic pen.
INSTANT CLARITY ZERO GUESSWORK - Backlit LCD auto-locks stable readings with green/red purity alerts.
VERSATILE TESTING FOR EVERY LIFESTYLE - Perfect for drinking water, aquariums, hydroponics, pools & more.

The HoneForest 3-in-1 Water Quality Tester delivers professional-grade accuracy with a titanium alloy probe and automatic temperature compensation. It measures TDS, electrical conductivity, and temperature across a broad 0-9990 ppm range, displaying results on a backlit LCD that signals water purity with intuitive green/red alerts. Designed for ease and versatility, it’s ideal for drinking water, aquariums, hydroponics, and pools. Compact and portable with a protective case, it comes factory-calibrated and backed by a 3-year warranty and 90-day money-back guarantee.

Specifications

ASIN	B073713G5F
ASIN	B073713G5F
Batteries Included?	No
Batteries Required?	No
Color	White, White
Customer Reviews	4.5 4.5 out of 5 stars (15,579)
Customer reviews	4.5 4.5 out of 5 stars (15,579)
Date First Available	1 November 2017
Date First Available	1 November 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	46 g
Item model number	HFTDS-M7
Item model number	HFTDS-M7
Manufacturer	HoneForest
Manufacturer	HoneForest
Material	Plastic
Part number	HFTDS-M7
Power source type	Battery Powered
Product Dimensions	15.98 x 2.9 x 1.5 cm; 46 g
Product Dimensions	15.98 x 2.9 x 1.5 cm; 46 g
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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