| Specifications | CT-6021A | |
| Display | LCD, size : 20 mm x 27 mm. | |
| Measurement Range | -1200mV~+1200mV | |
| Accuracy | ±mV | |
| mV Calibration | 0mV and 500mV calibration ensure the best linearity and accuracy. | |
| Operating Humidity | Less than 80%RH | |
| Dimension | 188 x38mm * Meter with pH electrode. | |
| Weight | 82g (included electrode). | |
Source: https://www.meterstesters.com/products/ph-meters/mini-orp-meter-ct-8022.html