Ohaus Starter ST300
A handheld from a lab-equipment maker, for labs standardised on Ohaus. Other buyers get the same accuracy for less.
Amazon $455.32$455.32
±0.01 pH3-pointNone
3.1/5
A grower’s meter for checking pH and nutrient strength in reservoirs. It has the longest warranty here.
- ±0.1 pHAccuracy
- 2-pointCalibration
- YesReplaceable probe
Check price at Amazon$279.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Reads pH, conductivity and temperature with separate probes
- Conductivity probe needs no calibration
- Five-year meter warranty, the longest here
Cons
- Reads pH to 0.1 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 | METCOM |
|---|---|
| pH measurement | |
| Accuracy | ±0.1 pH |
| Resolution | 0.1 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 |
| Meter warranty | 5 years |
| Probe warranty | 6 months |
Alternatives in this type
Milwaukee MW102 Pro
A no-fuss handheld for brewing, food and hobby labs. It has a standard cabled electrode and a separate temperature probe.
Amazon $195.20$195.20
±0.02 pH2-pointNone
Milwaukee MW100 Pro
A basic cabled meter for rough checks. Most buyers get better accuracy for less from a pen tester.
Amazon $158.70$158.70
±0.2 pH2-pointNone
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