How do I get warranty support? I have had this for 3 months and it quit working, just shows zero with an occasional flash of random numbers.

It's the horrible design in the battery tray. The pressure that keeps the metal contacts down also lifts the entire battery tray away from it's case making it lose contact. You can try to press them back but it will only happen again.

can i get more Calibration powder?

Yes, available on Amazon. I use liquid ph 7 which I think is more economical and much simpler to use.

where are the batteries? it says included. are they installed inside? Mine won't turn on

Yes they are installed. They are most likely dead, both meters I received came with dead batteries. The thin black cap comes off if the push in the release on the back and pull it up.

Can this be used to test the pH of automotive coolant in your radiator??

Yes. It’s a general liquid ph meter

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Ruolan PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Yellow)

Ruolan PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium (Yellow)

Product ID: 640372385

👜pocket-sized portability

📏0.01 pH precision

🧪3 calibration kits included

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R$296

Duties & taxes included

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Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay sharp, stay balanced—measure pH like a pro, wherever life takes you!

COMPACT READY - Sleek, pocket-sized design lets you monitor pH anytime, anywhere—from poolside to hydroponics lab.
CALIBRATED CONFIDENCE - Includes 3 calibration powders to ensure your measurements are always spot-on—no guesswork.
PRECISION THAT MATTERS - Ultra-sensitive electrode delivers 0.01 pH accuracy for flawless water quality readings.
VERSATILE LIFE ENHANCER - Perfect for drinking water, aquariums, pools, spas, and hydroponics—your all-in-one water quality guardian.
SMART TEMPERATURE ADAPTATION - Auto temperature compensation guarantees reliable results regardless of water conditions.

The Ruolan PH Meter is a high-accuracy digital tester pen with 0.01 precision and a 0-14 pH range, designed for professionals and enthusiasts alike. It features three included calibration kits, automatic temperature compensation, and a compact, pocket-friendly design, making it ideal for testing water quality in drinking water, pools, aquariums, and hydroponic systems.

Specifications

ASIN	B08HLXBBK4
ASIN	B08HLXBBK4
Batteries	1 CR2 batteries required.
Batteries	1 CR2 batteries required.
Batteries Included?	No
Batteries Required?	No
Color	Yellow
Customer Reviews	3.9 3.9 out of 5 stars (8,481)
Customer reviews	3.9 3.9 out of 5 stars (8,481)
Date First Available	10 October 2020
Date First Available	10 October 2020
Item Weight	100 g
Manufacturer	Ruolan
Manufacturer	Ruolan
Manufacturer reference	ILEE
Manufacturer reference	ILEE
Package Dimensions	17.4 x 5.41 x 3.2 cm; 100 g
Package Dimensions	17.4 x 5.41 x 3.2 cm; 100 g
Part number	ILEE
Style	pH Meter Yellow

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