Method: sodium diethyldithiocarbamate spectrophotometry.

Measuring range: 0-3.00mg/L, 0.10-10.00mg/L

Indication error: ≤±10% when ≥0.2 mg/L;  ≤ ±0.02 mg/L when <0.2 mg/L

Repeatability: ≤±5%;

Stability: ≤±10% within 24h;

Measurement period: The minimum measurement period is 30 minutes, according to the site environment,

The color rendering time can be arbitrarily modified within 5～120min;

Sampling period: time interval (optionally adjustable from 10 to 9999min) and whole point measurement mode;

Calibration cycle: adjustable at any interval from 1 to 99 days;

Output: 4~20mA (2 channels) RS232, RS485

Environmental requirements: indoor with adjustable temperature, recommended temperature +5～28℃; humidity ≤90% (no condensation)

Power source: AC220±10% V, 50±10% Hz, 5A;

Dimensions: 1570×500×450 (mm)

The water sample is digested with acid and mixed with the regulator, and then oxidized by the oxidant. In the presence of an alkaline environment and the indicator, it reacts with the indicator to form a colored complex. The analyzer detects the color change, and Convert this change into the total zinc value and output it. The amount of colored complexes formed is equivalent to the total amount of zinc.

1. Sampling inspection of large watershed environment.

2. Practical use by laboratory researchers.

3. Monitoring of fishery breeding and breeding environment.

4. Monitoring of sewage outlets of sewage plants.

5. Rivers, lakes, streams, etc.