VIVOSUN AeroLab pH Pen
#4 in Pen testersFull review
A low-cost grower’s pen with a replaceable probe. Its maker publishes little beyond the accuracy claim.
Amazon $65.99$65.99
±0.01 pHNone
3.4/5
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.
- ±0.05 pHAccuracy
- 2-pointCalibration
- IP68Waterproof
- YesReplaceable probe
Check price at Amazon$249
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- pH, EC/ppm and temperature in one waterproof pen
- Bluetooth sync logs every reading to the Edenic app
- Replaceable double-junction probe
Cons
- Costs about three times a good pH-only pen
- Two-point pH calibration only
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | PENONE |
|---|---|
| pH measurement | |
| Accuracy | ±0.05 pH |
| Resolution | 0.01 pH |
| Range | 0 to 14 pH |
| Calibration | 2-point |
| Temperature compensation | Yes |
| Other readings | |
| Conductivity (EC/TDS) | Yes |
| ORP | No |
| Salinity | No |
| Build | |
| Replaceable probe | Yes |
| Waterproof rating | IP68 |
| Connectivity | Bluetooth app |
| Meter warranty | 2 years |
| Probe warranty | 6 months |
Alternatives in this type
Extech ExStik II PH100
#5 in Pen testersFull review
A pen with a flat electrode for checking cheese, meat, paper or wet surfaces as well as liquids.
Amazon $129.50$129.50
±0.01 pHNone
Ohaus Starter ST20
#7 in Pen testersFull review
A pen tester from a lab-balance maker, for classrooms and labs buying Ohaus gear. The Apera PH60 is more accurate for less.
Amazon $104.62$104.62
±0.05 pH3-pointNone
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