The hexavalent chromium online automatic analyzer is an optical method heavy metal online analyzer designed in accordance with national environmental protection standards. It is used for simultaneous online analysis of multiple heavy metal elements in water quality such as surface water, industrial process water, and industrial wastewater. The measured heavy metal elements include Class I and Class II heavy metal prevention and control projects in the Ministry of Environmental Protection's "Twelfth Five Year Plan" for comprehensive prevention and control of heavy metal pollution.

Measurement principle:

After mixing the water sample and regulator, hexavalent chromium reacts with the indicator in an acidic environment to form a colored complex. The analyzer detects the change in color and converts it into a hexavalent chromium value for output. The amount of colored complex generated is equivalent to the amount of hexavalent chromium.

Technical Indicators:

Method basis: Diphenylcarbazide spectrophotometric method

Measurement range: 0.00-2.00 mg/L 0.10-10.00 mg/L

Accuracy: When ≥ 0.2 mg/L, not exceeding ± 10%;

When it is less than 0.2 mg/L, it should not exceed ± 0.02 mg/L.

Repeatability: not exceeding ± 5%;

Stability: ≤ ± 10% within 24 hours;

Measurement cycle: The measurement cycle is 30 minutes,

The color development time can be modified arbitrarily within 5-120 minutes

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

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

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

Environmental requirements: Indoor with adjustable temperature, recommended temperature range of+5-28 ℃; Humidity ≤ 90% (non condensing);

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

Dimensions: Height 1570 x Width 500 x Depth 450 mm;

Other: Abnormal alarms and power outages will not lose data, touch screen display and command input; After abnormal reset and power failure, the instrument will automatically discharge residual reactants and restore working status.