Apera PC60 pH/EC Tester
#1 in Pen testersFull review
A pen that checks pH and nutrient strength together, for hydroponic growers and reef keepers. It is accurate and the probe can be replaced.
Amazon $131.16$131.16
The Apera PC60 pH/EC Tester is the better ph meter overall, rated 4.1 to 3.4. The Apera PC60 pH/EC Tester leads on accuracy, calibration and price. The Bluelab OnePen wins on features. The Apera PC60 pH/EC Tester costs $117.84 less ($131.16 vs $249).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Bluelab OnePen
#6 in Pen testersFull review
A connected pen for serious hydroponic growers who want pH and nutrient readings logged to their phone. Most buyers get more for less from the Apera PC60.
Amazon $249$249
Which should you buy?
- Choose the Apera PC60 pH/EC Tester for accuracy (±0.01 pH vs ±0.05 pH), calibration (3-point calibration vs 2-point calibration) and price ($131.16 vs $249).
- Choose the Bluelab OnePen for features (replaceable probe, automatic temperature compensation, waterproof (IP68), stores readings vs replaceable probe, automatic temperature compensation, waterproof (IP67)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every pen testers ph meter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Apera PC60 pH/EC Tester | Bluelab OnePen |
|---|---|---|
| Overall rating | 4.1/5 | 3.4/5 |
| Accuracy 30% | 81 ±0.01 pH | 38 ±0.05 pH |
| Calibration 15% | 85 3-point calibration | 50 2-point calibration |
| Features 20% | 80 replaceable probe, automatic temperature compensation, waterproof (IP67) | 100 replaceable probe, automatic temperature compensation, waterproof (IP68), stores readings |
| Extra readings 10% | 80 conductivity (EC/TDS), salinity | 70 conductivity (EC/TDS) |
| Price 15% | 66 $131.16 | 38 $249 |
| Warranty 10% | 25 2-year meter warranty | 25 2-year meter warranty |
Specifications
| Apera PC60 pH/EC Tester | Bluelab OnePen | |
|---|---|---|
| pH measurement | ||
| Accuracy | ±0.01 pH | ±0.05 pH |
| Resolution | 0.01 pH | 0.01 pH |
| Range | -2 to 16 pH | 0 to 14 pH |
| Calibration | 3-point | 2-point |
| Temperature compensation | Yes | Yes |
| Other readings | ||
| Conductivity (EC/TDS) | Yes | Yes |
| ORP | No | No |
| Salinity | Yes | No |
| Build | ||
| Replaceable probe | Yes | Yes |
| Waterproof rating | IP67 | IP68 |
| Connectivity | - | Bluetooth app |
| Battery life | 1,000 hours | - |
| Weight | 133 g | - |
| Meter warranty | 2 years | 2 years |
| Probe warranty | 6 months | 6 months |