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Best ph meters - May 2026

Last Updated - May 6, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Oakton

Oakton WD-35634-30 pHTestr 30 pH Tester, For Temperature

Oakton

$131.08

More Details
Main highlights
- Waterproof, dustproof housing that sits on a flat surface and the meter floats, if dropped in liquids
- Unique, double-junction electrode design and increased reference gel volume for long electrode life in harsh environments
- Three-point, push-button calibration with auto-buffer recognition for a wide range of results
- Large, upright, dual-line LCD display screen for ease of viewing, and to display indicators
- Automatic Temperature Compensation (ATC) for accurate readings in fluctuating temperatures
$131.08
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

AC Infinity

AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

AC Infinity

$79.99

More Details
Main highlights
- Replaceable sensor probe with sensitive glass membrane delivers instant pH readings with pinpoint accuracy.
- Measures the acidity, alkalinity, and temperature of water for gardens, aquariums, pools, and more.
- Lab-grade test kit includes ready-to-use KCL, 4.00, 7.00 & 10.01 solutions for long-lasting precision.
- IP-67 rated to be sealed from high-volume moisture, dust, and sand; can also withstand high levels of heat.
- Advanced pH reader for water quality assessment designed to help monitor and maintain proper pH levels.
$79.99
3
15% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

VIVOSUN
15% Off

VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified

VIVOSUN

$13.59

$15.99
(15% Off)

More Details
Main highlights
- PH Meter: Full measurement range of pH 0 - 14, reliable and quick readings
- Included: PH meter, 3-in-1 TDS meter, 3 calibration buffers
- Features: Comes with protective case; Lightweight, handheld design for portability and convenience
- Application: Great for all home and laboratory TDS & pH testing applications including aquariums, swimming pools
- 3-in-1 TDS Meter: Measurement Range 0-9990ppm, 0-9990µs/cm; Accuracy ± 2%, 0.1- 80.0°C, 32.0-176.0°F; Note: This meter can't test sea water
$13.59
$15.99 (15% Off)
4
10% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Ruolan
10% Off

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)

Ruolan

$8.99

$9.99
(10% Off)

More Details
Main highlights
- 【Pre-Calibrated for Immediate Use】The pH meter is pre-calibrated before shipment and can be used directly out of the box. For best accuracy, readings may vary slightly depending on water conditions and environment.
- 【Multi-Purpose Water Testing】Ideal for drinking water, swimming pools, aquariums, hydroponics, RO systems, and other environments requiring pH monitoring.
- 【High Accuracy & Wide Measurement Range】Measures pH values from 0 to 14 with high accuracy (±0.01 under standard conditions). Provides stable and reliable readings for daily water testing.
- 【Easy Operation】Simply turn on the device, immerse the probe into the solution, gently stir, and wait for the reading to stabilize before recording the result.
- 【Compact & Portable Design】Pocket-size design allows easy carrying for testing anytime, anywhere. Suitable for home, travel, and outdoor use.
$8.99
$9.99 (10% Off)
5
Best Value
24% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Apera Instruments
24% Off

APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

Apera Instruments

$50.22

$66.00
(24% Off)

More Details
Main highlights
- Up to 2000 hours' continuous operation, powered by AAA batteries
- Easy auto. calibration with buffer recognition; auto. temp. compensation (ATC) ensures accuracy in various temperatures (32 to 122F)
- Comes in a rugged carrying case with pH 4&7 buffers and a lanyard
- Backed by Apera quality pH sensor with low impedance, ensuring high response rate
- Auto recognition of stable values improves consistency, so you don't have to guess when to manually hold measurement
$50.22
$66.00 (24% Off)

Best ph meters - May 2026

Oakton WD-35634-30 pHTestr 30 pH Tester, For Temperature

AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified

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)

APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

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