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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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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)

Product ID: 640372385

👜pocket-sized portability

📏0.01 pH precision

🧪3 calibration kits included

Description

💧 Stay sharp, stay balanced — your pocket-sized pH guru!

COMPACT READY - Sleek, pocket-sized design lets you monitor pH anytime, anywhere — poolside, camping, or at home.
PRECISION THAT MATTERS - Ultra-sensitive electrode delivers 0.01 pH accuracy for flawless water quality insights.
VERSATILE LIFE ENHANCER - Perfect for hydroponics, aquariums, pools, and drinking water — elevate your environment’s health.
CALIBRATE WITH CONFIDENCE - Includes 3 calibration powders to guarantee your readings stay rock-solid and reliable.
SMART TEMPERATURE ADAPTATION - Auto temperature compensation ensures accurate results regardless of water conditions.

The Ruolan PH Meter is a high-precision digital tester with 0.01 accuracy and a full 0-14 pH range. It comes with 3 calibration powders for guaranteed accuracy and features automatic temperature compensation. Its compact, pocket-friendly design makes it ideal for testing water quality in hydroponics, aquariums, pools, and household drinking water, empowering you to maintain optimal pH balance anytime, anywhere.

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 (8,612)
Customer reviews	3.9 3.9 out of 5 stars (8,612)
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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