The Hanna Instruments pH20 and pH21 are basic pH meters designed for simplicity of use in applications requiring rapid daily controls. These models measure pH in a range from 0 to 14 with a resolution of 0.01. The pH21 model additionally supports ORP (mV) measurements when used with an optional electrode.
| Range (pH) | 0.00 to 14.00 |
|---|---|
| Resolution (pH) | 0.01 |
| Accuracy (pH) | ±0.02 (@20°C/68°F) |
| Calibration | Automatic, 1 or 2 point |
| Temperature Compensation | Automatic (with probe) or manual |
The meters measure pH in the 0 to 14 range.
Yes, you can choose between 1 or 2 points for automatic calibration.
Press and hold the HOLD key to freeze the reading, which lights up the "HOLD" tag.