Top 10 Best apera in 2026

Last Updated - 6/8/2026

🏆Best Choice

Apera Instruments

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

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

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

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$50.21

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Apera Instruments

APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•The top-rated pH tester now comes with a complete CALIBRATION and PROBE CARE Combo Kit, ensuring reliable test performance
•Comes with a probe cleaning brush for easy removal of contaminants on probes, maximizing probe's life-span
•Comes with Apera's unique CalBox, heping you organize all the solutions and save cost on buffers by at least 50%
•Apera quality pH sensor with low impedance, greatly improving response speed and shorteninb stablizing process
•Easy auto. calibration with buffer recognition; auto. temp. compensation (ATC) ensures accuracy in various temperatures (32 to 122˚F)

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$80.26

$88.39

-9%

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Apera Instruments

Apera Instruments AI1113 pH Calibration Buffer Solution Kit (7.00, 4.00), 8 oz. Each

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Reported values are accurate to +/- 0.01 pH at 25 °C and are traceable to NIST Standard Reference Materials (SRMs).
•Produced in an ISO 9001:2015 certified facility using high-purity reagents, deionized water and certified analytical balances in a temperature controlled environment.
•color-coded for quick identification.
•Double-sealed. 2-year expiration from manufacture for an unopened bottle.

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$17.00

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Apera Instruments

Apera Instruments, LLC-AI1104 16oz. pH Calibration Buffer Solution Kit (pH 4.00, 7.00 & 10.01), plus 3M KCL Storage Solution and CalBox

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Reported values are accurate to +/- 0.01 pH at 25 °C and are traceable to NIST Standard Reference Materials (SRMs).
•Produced in an ISO 9001:2015 certified facility using high-purity reagents, deionized water and certified analytical balances in a temperature controlled environment.
•color-coded for quick identification.
•Apera CalPod solution holder is included for organizing all the buffers and streamlining your calibration process.
•Double-sealed. 2-year expiration from manufacture for an unopened bottle.

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$31.30

$41.11

-24%

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Apera Instruments

Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy, Lcd display

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•NOTE: A few drops of water are added to the electrode cap before the product leaves the factory. This is to maintain the sensitivity of the electrode. Therefore, when you use it for the first time, it is normal to find water droplets in the electrode cap
•Accuracy: 0.01 pH; range: -2.00 to 16.00 pH, 32 to 122˚F (0 to 50˚C); Auto. Power-Off: 8 minutes without operation
•Easy 1-3 points auto. calibration, recognizes 5 types of solutions (1.68, 4.00, 7.00, 10.01, 12.46); Auto Temp. Compensation (ATC) ensures accuracy in various temperatures (32-122˚F)
•High quality replaceable glass pH probe, suitable for regular water solutions e.g. pools&spas, hydroponics, environmental monitoring, cooling towers, beverage, etc.
•Large LCD with 3 backlit colors (indicating different modes), dual display of temp./pH, and reminders of completed calibrations and stable readings
•The smiley icon indicates stable readings so you won't have to guess when is the right time to record the measurements
•COMPLETE KIT with READY-TO-USE calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a rugged portable case

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$79.65

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Apera Instruments

Apera Instruments 3M KCL Storage Soaking Solution (8 oz.) for pH and ORP Electrodes

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•For conditioning and extending the life of your probes
•Made with reagent grade chemicals to ensure optimal performance of your pH probes
•Double-sealed package to ensure freshness
•Expiration date clearly specified

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$14.99

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Apera Instruments

Apera Instruments, LLC-AI1109 8oz. pH Calibration Buffer Solution Kit (pH 4.00, 7.00 & 10.01), plus 4oz 3M KCL Storage Solution for pH/ORP Electrodes

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Reported values are accurate to +/- 0.01 pH at 25 °C and are traceable to NIST Standard Reference Materials (SRMs).
•Produced in an ISO 9001:2015 certified facility using high-purity reagents, deionized water and certified analytical balances in a temperature controlled environment.
•color-coded for quick identification.
•Double-sealed. 2-year expiration from manufacture for an unopened bottle.

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$30.00

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Apera Instruments

APERA INSTRUMENTS AI316 Premium Series PC60 5-in-1 Waterproof pH/EC (Conductivity) /TDS (ppm) /Salinity (ppt) /Temp. Multi-Parameter Pocket Tester Kit

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Measures pH/EC/TDS (ppm)/Salinity/Temp. in a quick and professional manner
•Replaceable multi-parameter probe with easy installation
•When the smiley face icon stays on screen, it's the right time to record the measurements.
•LARGE Clear LCD screen with 3 backlit color (indicating 3 different modes), dual display of temp. + pH/EC/TDS/Salinity, and icons of completed calibrations and stable readings
•Complete kit with ready-to-use calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a portable carrying case

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$130.54

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Apera Instruments

Apera Instruments 201T-F All-in-one pH Electrode, ATC, BNC/RCA Connector, Polycarbonate Body AI1302

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Built-in temperature sensor testing pH and temperature simultaneously enabling ATC (Auto Temp Compensation)
•Apera's special lithium glass membrane ensures quick and stable pH readings
•Detachable sensor shield is built upon the sensitive glass membrane to protect it from accidental damage
•Gel KCL electrolyte adopted No need for refilling
•A unique junction composed of ceramic and fiber filament efficiently improves the problem of junction clogging

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$70.00

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Apera Instruments

Apera Instruments, LLC-AI1201 Apera Instruments,LLC PH60-E Replacement Probe for PH60 Pocket pH Tester

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Measurement range: 0 - 14.00 pH, 0 - 50˚C
•Lithium glass membrane with built-in temperature sensor
•Gel KCL electrolyte, maintenance-free
•Works well for 12-24 months under proper use and care
•Made for general water solution's pH testing
•Material Type: Plastic Glass

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$29.29

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