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.

Vivosun Digital Ph Meter 0 01ph High Accuracy Pen Type

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€ 18.23

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Description

📊 Elevate your pH game—precision meets portability in one sleek pen!

COMPACT READY TO GO - Pocket-sized, lightweight design with batteries included—test anywhere, anytime
CRYSTAL CLEAR DISPLAY - Backlit LCD screen ensures easy reading even in low light or busy environments
INSTANT INSIGHTS WITH ATC - Automatic Temperature Compensation delivers real-time, temperature-adjusted pH readings
VERSATILE FOR EVERY SETTING - Perfect for hydroponics, pools, aquariums, labs, and household water testing—be the expert in any scenario
PRECISION THAT PROFESSIONALS TRUST - Ultra-fine 0.01 pH accuracy for flawless measurements every time

The VIVOSUN Digital pH Meter offers ultra-precise 0.01 pH accuracy with automatic temperature compensation, housed in a compact, lightweight pen design. Featuring a backlit LCD for easy reading and including batteries and calibration powders, it’s UL certified and ideal for hydroponics, pools, aquariums, labs, and household water testing—empowering professionals and enthusiasts to monitor pH levels with confidence and convenience.

Specifications

ASIN	B01M5IASHD
Best Sellers Rank	11,338 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 14 in Lab pH Meters
Brand	VIVOSUN
Country Of Origin	China
Customer Reviews	3.8 out of 5 stars 10,735 Reviews
Included Components	Batteries included
Item Weight	0.11 Kilograms
Manufacturer	VIVOSUN
Manufacturer Part Number	4316344538
Material	ABS
Material Type	ABS
Model Number	4316344538
Recommended Uses For Product	water, pool, spas, liquid food, laboratory, aquaculture, hydroponics
Recommended uses for product	water, pool, spas, liquid food, laboratory, aquaculture, hydroponics
Sterility Rating	0.00-14.00
UPC	714119465581
pH range	0.00-14.00

Reviews

M**N

Ok product

Works well

6.10.2025

N**T

Amazing value and warrantied

Amazing value and came with warranty for peace of mind

30.05.2025

W**O

gives poor readings even when calibrated and packs up within a month

Even straight after calibrating this was about 5 points off no matter how many times i recalibrated and within a month of use it just started throwing up random numbers,I did keep it in storage solution and used a PH meter cleaner,It was giving readings like 9.0 for distilled water.More landfill crap

20.02.2025

L**B

Not clear at all.

Couldn’t understand the instructions nor the readings. Returned and bought a more expensive one that had ‘normal’ readings! Seller got in touch and sent a replacement foc. Very kind of them but the instructions are no clearer. Until the writhing is enlarged, I can’t give a better review.

19.02.2025

J**T

Does the job

Great

17.11.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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