Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit
- ±0.01 pH accuracy, LCD display
- Replaceable PH60-E probe included
- Works with 3 other electrode types and an ORP probe, sold separately
- 4 AAA batteries included
- 7 x 1.6 x 1.6 inches, 10 ounces
- 3M KCl liquid included for low ion samples
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A fine-resolution pocket pH tester with a replaceable probe and support for other electrodes. Extra electrodes are sold separately, and the listing says nothing about battery life.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B01ENFOIQEModel: AI311Category: pH Meters
Styles Available
Need a different one? Pick on Amazon →
Overview
Apera Instruments makes this pocket pH tester for general water work, from hydroponics and aquaculture to pools, cooling towers and beverage making. The probe is replaceable, and the meter reads on an LCD display.
The replaceable probe and the option to fit other electrode types give it a longer working life than a fixed-probe meter. The kit includes a bottle of KCl liquid to speed up readings in pure water. Other probes and an ORP probe are sold separately.
Who it's for
Hydroponics growers, aquaculture keepers and pool or water treatment users who need finer readings. People who just want a basic spot check may prefer a simpler meter.
Pros and cons
- Replaceable pH probe
- Accepts other electrode types
- Waterproof pocket body
- KCl liquid included
- Other electrodes sold separately
- Battery life not listed
- Calibration steps not listed
Performance notes
Low ion-strength samples such as distilled or reverse osmosis water are slow to settle, so a few drops of the included KCl liquid in the sample speed stabilization without changing the reading. Switching to another electrode adapts the meter to solids or surfaces.
Where it stands among ph meters
- #5 most-searched brand and model of the 8 ph meters lines we track (by search demand, not sales).
From the specs of the 15 ph meters we list; not a test result.
Specifications
| Brand | Apera Instruments |
|---|---|
| Model | AI311 |
| Dimensions & fit | |
| Dimensions | 7 x 1.6 x 1.6 inches |
| Weight | 10 ounces |
| Compatibility & installation | |
| Compatible Electrodes | 3 other pH electrode types and an ORP probe (sold separately) |
| Other details | |
| Accuracy | ±0.01 pH |
| Display | LCD |
| Item model number | AI311 |
| Probe | Replaceable PH60-E |
| Batteries | 4 AAA (included) |
Closest rivals on specs
Bluelab pH Pen - ± 0.1 pH Accurate - Durable Double Junction Probe- Item Weight 0.62 vs 0.27 pounds (+130%)
VIVOSUN Digital pH Meter 0.01 Accuracy Pen Tester for Water Hydroponics- Item Weight 0.62 vs 0.24 pounds (+158%)
Hanna Instruments HI98128 pHep 5pH/Temperature Tester- Item Weight 0.62 vs 0.22 pounds (+182%)
Frequently asked questions
What is the KCl liquid in the Apera PH60 kit for?
Adding a few drops of the included 3M KCl liquid to a low ion-strength sample such as distilled or RO water speeds up stabilization without changing the pH reading.
Can the Apera PH60 use other probes?
Yes. It works with 3 other pH electrode types and an ORP probe, all sold separately.
Is the Apera PH60 probe replaceable?
Yes. It ships with a replaceable PH60-E probe for general water solutions.