| Product name |
Water Quality Meter (two-wire transmitter) |
| Model |
HQ-300 |
| Measurement item |
pH, ORP, Dissolved oxygen, Fluoride ion, Electrical conductivity, Electrical resistivity |
| Measurement |
pH |
pH 0 to pH14 |
| range |
ORP |
-2000mV to 2000 mV |
| Dissolved oxygen |
0mg/L to 20 mg/L |
| Fluoride ion |
0mg/L to 10000 mg/L |
| Electrical conductivity |
0μS/cm to 2000μS/cm (0 mS/m to 200mS/m)（Measurement range varies with cell constant.） |
| Electrical resistivity |
0 MΩ･cm to 20 MΩ･cm(0 kΩ･m to 200 kΩ･m) |
| Accuracy |
pH |
Repeatability |
Within ±0.03 pH at equivalent input |
| Linearity |
Within ±0.03 pH at equivalent input |
| ORP |
Repeatability |
Within ±5 mV at equivalent input |
| Linearity |
Within ±5 mV at equivalent input |
| Dissolved oxygen |
Repeatability |
Within ±0.5% of full scale at equivalent input |
| Linearity |
Within ±0.5% of full scale at equivalent input |
| Fluoride ion |
Repeatability |
Within ±7% of full scale at equivalent input |
| Linearity |
Within ±10% of full scale at equivalent input |
| Electrical conductivity |
Repeatability |
Within ±0.5% of full scale at equivalent input |
| Linearity |
Within ±0.5% of full scale at equivalent input |
| Electrical resistivity |
Repeatability |
Within ±0.1% of full scale at equivalent input |
| Linearity |
Within ±0.5% of full scale at equivalent input |