Is this pH pen worth it compared with a name-brand pen?

It costs less but lacks automatic calibration and temperature compensation. If you need reliable, frequent readings, a name-brand pen is more consistent. For occasional checks on a budget, it can work.

Does it come with calibration solutions?

No. You need to buy pH buffer powders or solutions separately to calibrate it.

What batteries does it use and are they included?

It uses four AG-13 button batteries, which are not included. You will need to supply them.

Can it be used for hydroponics and aquariums?

Yes, it is designed for both, as well as other water testing. Just calibrate it before use and recalibrate regularly.

How often should I calibrate it?

Reviewers suggest calibrating before each use or at least weekly, because the reading tends to drift.

The pen is not fully waterproof; only the electrode tip should be immersed. Avoid getting the display or battery compartment wet.

Where is the Digital LCD Pocket pH Meter Pen cheapest?

At Deal.ai, for $19.02, as of our latest check.

Digital LCD Pocket pH Meter Pen

Sold and shipped by Deal.ai

$19.02Free shipping

Title: Default Title

Arrives about Nov 14–23, from a US warehouse

No returns for change of mind. If it arrives damaged or isn't what you ordered, or never arrives, report it within 30 days and we refund you in full.

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $19.02 at Deal.ai on Nov 8.

Our take on the Digital LCD Pocket pH Meter Pen

What reviewers say

Reviewers say this pen works for basic pH checks if you calibrate it often, but many find it drifts and is fiddly to adjust. It is seen as a budget option that is better than nothing but not a long-term tool.

What people mention

AccuracyMixedSome say it is accurate enough for quick checks; others report readings that drift within days.
CalibrationCriticisedOwners complain that calibration is manual and the potentiometer screw is hard to fine-tune.
Build qualityMixedIt feels light and plasticky, but the included case helps protect it.
BatteryCriticisedIt uses four AG-13 button cells that are not included, which annoys some buyers.
ValuePraisedBuyers say it is a cheap way to get a pH reading without spending much.

About the Digital LCD Pocket pH Meter Pen

Digital Electric PH Meter LCD Tester Pocket Hydroponics Aquarium Water Test Pen Ph Meter : Range: 0.0 14.0pH Resolution: 0.1pH Accuracy: 0.1pH( at 20 C/ 68 F) Typical EMC DEV: 0.2pH Batteries: 4 x 1.5V ( AG-13 Button Battery) (Not Included) Life: approx. 700hours of use Environment: 0 C ~ 50 C( 32 F 122 F) Relativ Humidity: <95 % Dimensions: 150mm x 29mm x 16mm Trimming: by potentiometer Weight: 51g - Perfect for both residential or commercial use - Portable unit - includes a carrying case with belt clip - Advanced microprocessor technology allows you test the water with accuracy - Ideal for all water purification applications, wastewater regulation, aquaculture and hydroponics - Batteries not included - Does NOT come with Buffer Powder Extra Information: Bring back the original brand new look! This is a NEW part. This item is BRAND NEW! Save MONEY and your Device using the best replacement part available. This Assembly ships with a protective foam wrap, along with a protective plastic to prevent any scratches. This item is very carefully packaged Payment Information: We Accept PayPal We Accept Credit Card via PayPal Shipping Information: We provide Same Day FREE SHIPPING domestically within the U.S.A USPS First Class (3-5 business days) & USPS First-Class International (14 days with tracking) (We do ship to APO/FPO) We reserve the right to charge additional shipping fee for reship items due to wrong shipping address provided during checkout. All orders before 5PM EST will ship out same day!, Monday - Friday Ships Same Day Today! Refund & Return Policy: We offer a 30 day return policy on all items purchased from us. Please contact us within 30 days after receipt of the item for a return. Do not ship the item back to us without contacting us first. Return shipping is responsibility of buyer. - We thank you so much for looking! If you have any questions or concerns, please do not hesitate to message us. Have a great day!