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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Digital pH Meter Tester Pen for Water, Pre-Calibrated, High Accuracy ±0.01, 0–14 pH Range, Pocket Size for Drinking Water, Pool, Aquarium & Hydroponics (Yellow)

Digital pH Meter Tester Pen for Water, Pre-Calibrated, High Accuracy ±0.01, 0–14 pH Range, Pocket Size for Drinking Water, Pool, Aquarium & Hydroponics (Yellow)

Product ID: 231974651

👜pocket-size portability

📏±0.01 high accuracy

🧪0–14 full pH range

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Description

💧 Stay ahead of the curve with precision pH testing anytime, anywhere!

COMPACT POWERHOUSE - Sleek, pocket-sized design fits effortlessly in your bag for on-the-go monitoring.
READY WHEN YOU ARE - Pre-calibrated out of the box—start testing instantly without any setup delays.
PRECISION YOU CAN TRUST - Experience lab-grade accuracy with ±0.01 pH precision for flawless water quality readings.
VERSATILE WATER TESTING - Perfect for drinking water, pools, aquariums, hydroponics, and RO systems—one tool for all your needs.
USER FRIENDLY CALIBRATION - Easy 3-step calibration ensures your readings stay reliable and consistent every time.

This Digital pH Meter Tester Pen offers ultra-precise ±0.01 accuracy across the full 0–14 pH range. Pre-calibrated for immediate use, its compact, pocket-sized design makes it ideal for professionals managing water quality in drinking water, pools, aquariums, and hydroponics. Easy calibration and user-friendly operation ensure reliable, on-the-spot pH monitoring wherever you go.

Specifications

ASIN	B08HLXBBK4
Batteries	1 CR2 batteries required.
Best Sellers Rank	#1,209 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Lab pH Meters
Date First Available	September 7, 2020
Item Weight	3.52 ounces
Manufacturer	Ruolan
Package Dimensions	6.85 x 2.13 x 1.26 inches

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S$17

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Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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