




Qiwei DDS-11A conductivity meter (precision type) is suitable for measuring the conductivity of various liquid media in the laboratory. It adopts a professional circuit structure, high-definition digital display, and can output measurement signals. It has high measurement reliability and stability. . The measurement range of DDS-11A conductivity meter is 0~2×105 (μS/cm), and when equipped with 0.1, 10 constant conductivity electrodes, it can accurately measure the conductivity of high-purity water or high-conductivity water.
DDS-11A precision conductivity meter is widely used in scientific research, teaching, industry, agriculture and many other disciplines and fields.
Please use the DDS-11A conductivity meter under the following environmental conditions: ambienttemperature 0°C ~ 40°C; relative air humidity ≤ 85%; no significant vibration, strong magnetic field interference

When the standard constant J0=1 electrode is selected for measurement, the range display range is as shown in "Table 2".
"Table 2" When J0=1, the corresponding range display range of each range segment of the instrument
| serial number | Range switch position | Instrument display range | Corresponding range display range (μS/cm) |
| 1 | 20μS | 0~19.99 | 0~19.99 |
| 2 | 200μS | 0~199.9 | 0~199.9 |
| 3 | 2mS | 0~1.999 | 0~1999 |
| 4 | 20mS | 0~19.99 | 0~19990 |
Note: Ranges 1 and 2 are in μS; ranges 3 and 4 are in mS. Its relationship: 1μS=10-3 mS=10-6 S When using other specification constant electrodes, the display range of its measuring range is shown in "Table 3".
《Table 3》 When other standard constant electrodes are selected, the display range of their measuring ranges.
| serial number | Range switch position | Instrument display range | The standard constants of selected electrodes Corresponding range display range (μS/cm) | ||
| J 0 =0.01 | J 0 =0.1 | J 0 =10 | |||
1 | 20μS | 0~19.99 | (0~19.99)×0.01 | (0~19.99)×0.1 | (0~19.99)×10 |
2 | 200μS | 0~199.9 | (0~199.9)×0.01 | (0~199.9)×0.1 | (0~199.9)×10 |
3 | 2mS | 0~1.999 | (0~1999)×0.01 | (0~1999)×0.1 | (0~1999)×10 |
4 | 20mS | 0~19.99 | (0~19990)×0.01 | (0~19990)×0.1 | (0~19990)×10 |
K=D×J
K: conductivity of the measured liquid; D: instrument display value; J: conductivity electrode specification constant.