What do you use to clean electrode?

Instructions say to use distilled water to clean electrodes

Would this be a good tool for an aquarium?

Sure it will read the Ph for your tank

Does it work well for testing ph in a saltwater pool?

I don’t know anything about testing pool water but it will definitely give you the ph between 4.0-10

My pen has gone way out of calibration. Is there a way to calibrate it against an accurate test kit? I.e. just set the pH?

I second the answer but Alix. I thought it could be recalibrated against the standards they provide and I would be back to using the ph tool. Once it started to give me bogus readings I knew I had a new paper weight. I even bought 7.0 fluid so I could check it before each use so I knew the readings were correct. I have extensive experience calibrating thousands of gauges in a railroad machine shop to NIST and audited by the ARR annually. Knowing I have a good accurate tool is important to me. The quality of this tool is below the mark. I am surprised as I own VIVOSUN products that are more reliable so I thought I would give it a chance. It lasted almost a year for me.

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VIVOSUN Digital pH Meter 0.01 Accuracy Pen Tester for Water Hydroponics

Product ID: 40679482

Details

Brand
VIVOSUN
Manufacturer
VIVOSUN
Ph Range
0.00-14.00
UPC
714119465581
Unit Count
1 Count

💡Backlit LCD for clear readings

📏±0.01 pH ultra-precise accuracy

🌡️ATC auto temp compensation

EC$61

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay ahead with precision—because your water deserves the best!

COMPACT READY TO GO - Pocket-sized, lightweight design with batteries included—perfect for on-the-move testing in any environment.
EFFORTLESS CALIBRATION - Advanced auto-calibration technology guarantees fast, accurate results every time—no guesswork needed.
SMART TEMPERATURE ADAPTATION - Automatic Temperature Compensation (ATC) ensures instant, reliable pH readings regardless of water temp.
VERSATILE APPLICATION POWERHOUSE - Ideal for hydroponics, aquariums, pools, labs, and more—join thousands of pros optimizing their water quality.
PRECISION THAT PROFESSIONALS TRUST - Achieve lab-grade ±0.01 pH accuracy for flawless water quality control.

The VIVOSUN Digital pH Meter delivers professional-grade ±0.01 accuracy with automatic temperature compensation and easy auto-calibration. Its compact, lightweight design features a backlit LCD for clear readings in any setting. Perfectly suited for hydroponics, aquaculture, pools, labs, and more, this UL-certified pen tester comes ready with batteries and calibration powders, empowering you to maintain optimal water quality effortlessly.

Specifications

ASIN	B01M5IASHD
Best Sellers Rank	#576 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Lab pH Meters
Brand	VIVOSUN
Brand Name	VIVOSUN
Customer Reviews	4.0 out of 5 stars 33,941 Reviews
Included Components	Batteries included
Item Highlight	±0.01 pH Accuracy, ATC, Auto Calibration, Backlit LCD, Memory, Compact, UL Certified, for Hydroponics Aquarium Pool Drinking Item Highlight ±0.01 pH Accuracy, ATC, Auto Calibration, Backlit LCD, Memory, Compact, UL Certified, for Hydroponics Aquarium Pool Drinking See more
Item Weight	0.11 kg
Manufacturer	VIVOSUN
Material Type	ABS
Model Number	4316344538
Number of Items	1
Part Number	4316344538
Ph Range	0.00-14.00
Sterility Rating	0.00-14.00
UPC	714119465581
Unit Count	1 Count

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