COD

COD, ammonia nitrogen, total phosphorus three-parameter analyzer

COD-4DA

The instrument mainly measures the level of concentration of COD, but also with determination of ammonia nitrogen, total phosphorus function.

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COD-4DA multi-function water quality analyzer is our fifth generation of products, entirely based on "quick digestion spectrophotometry (HJ / T 399-2007)" design, suitable for many domestic and international testing standards. The instrument mainly measures the level of concentration of COD, but also with determination of ammonia nitrogen, total phosphorus function, the instrument uses a high-resolution display, the Chinese operation interface, all Chinese operation buttons, user-friendly operation prompt for the rich character prompt steps , which greatly facilitates the user, simple operation, will operation by seeing the screen prompting, the instrument has advantages ,such as a high degree of automation, stable performance, easy operation, accurate measurement, the sample operating cycle is short, low power consumption. Instrument has value direct reading, auto-zero, curve storage, automatic printing, data storage functions. It can be widely used in a variety of industry wastewater,  city wastewater, sewage and lakes surface water, is the ideal tool for environmental water quality monitoring .

Features:
(01) Direct determination of the high and low level concentration of chemical oxygen demand (COD), ammonia nitrogen, direct reading total phosphorus concentration;
(02) Large-screen displays measurement results;
(03)One button switch measurement parameters;
(04) Memory 400 curve, standard curve, no need adjustment, can be used directly, extended curve 400 can be freely applied under different people, different environments, different waste water and other conditions;
(05) The instrument automatically calculates the stored standard curve according to the standard sample;
(06) Can store 10,001 measurements at precise data (date, time, absorbance measurement results);
(07) Print current and historical data and all data is stored;
(08) Digestion power automatic adjustment  with the number of load, intelligent temperature control, with delay protection;
(09)Equipped with a hood made of the transparent heat-resistant material, to ensure safe and reliable experiment;
(10) Automatic thermostat reminders, automatic countdown reminder, timing can be adjusted and saved;
(11) Room temperature ~ 190 ℃ digestion temperature adjustment range, wider compatibility;
(12)Digestion 12 water samples simultaneously

Measurement item

COD

Ammonia chloride

total phosphorus

Measurement range

2-10000mg/L

Ammonia chloride

0.02-20mg/L

Measurement accuracy

COD<50mg/L,≤±10%

≤±10%

≤±5%

The minimum detection limit

0.1mg/L

0.01mg/L

0.01mg/L

Measuring time

20 min

10-15 min

35-50min

Batch quantity

12 pcs water sample

12 pcs water sample

12 pcs water sample

Repeatability

≤±5%

≤±5%

≤±5%

Light source life

10W hours

Optical stability

≤0.001A/10min

≤0.001A/10min

≤0.001A/10min

Anti chlorine interference

[Cl-]﹤1000mg/L no impact
[Cl-]﹤4000mg/L (optional)

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Colorimetric method

Colorimetric plate

Colorimetric plate

Colorimetric plate

Storing data

1W

Number of curves

400pcs

video mode

LCD

Power supply mode

220V AC Power

Digestion temperature

165℃±0.5℃

 -

120℃±0.5℃

digestion time

10min

 -

30min

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