Bante 221 pH/ORP Portable
A handheld with benchtop-class accuracy and an ORP electrode in the box, for water-treatment and lab work away from the bench.
Amazon $350$350
The Bante 221 pH/ORP Portable is the better ph meter overall, rated 4.0 to 3.4. The Bante 221 pH/ORP Portable leads on extra readings, accuracy and calibration. The Bante 221 pH/ORP Portable costs $105.32 less ($350 vs $455.32).
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.
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
Which should you buy?
- Choose the Bante 221 pH/ORP Portable for extra readings (ORP vs pH and temperature only), accuracy (±0.002 pH vs ±0.01 pH) and calibration (5-point calibration vs 3-point calibration).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every portable meters ph meter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Bante 221 pH/ORP Portable | Ohaus Starter ST300 |
|---|---|---|
| Overall rating | 4.0/5 | 3.4/5 |
| Accuracy 30% | 100 ±0.002 pH | 81 ±0.01 pH |
| Calibration 15% | 100 5-point calibration | 85 3-point calibration |
| Features 20% | 75 replaceable probe, automatic temperature compensation, stores readings | 82 replaceable probe, automatic temperature compensation, waterproof (IP54), stores readings |
| Extra readings 10% | 70 ORP | 0 pH and temperature only |
| Price 15% | 23 $350 | 12 $455.32 |
| Warranty 10% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Bante 221 pH/ORP Portable | Ohaus Starter ST300 | |
|---|---|---|
| pH measurement | ||
| Accuracy | ±0.002 pH | ±0.01 pH |
| Resolution | - | 0.01 pH |
| Range | - | 0 to 14 pH |
| Calibration | 5-point | 3-point |
| Temperature compensation | Yes | Yes |
| Other readings | ||
| Conductivity (EC/TDS) | No | No |
| ORP | Yes | No |
| Salinity | No | No |
| Build | ||
| Replaceable probe | Yes | Yes |
| Waterproof rating | - | IP54 |
| Stored readings | 500 readings | 30 readings |
| Connectivity | USB | - |
| Battery life | - | 500 hours |
| Weight | - | 160 g |