1、 Execution standards

The KD-20 multi parameter detector has functions such as cold light source, large screen Chinese operation, connection to computer and printer, 10000 historical records, and 7-point automatic calibration. This product combines classic colorimetric methods with advanced computer technology, using microcomputer optoelectronic colorimetric detection principles to replace traditional visual colorimetric methods, eliminating human errors and greatly improving measurement resolution. The automation of the measurement process has been achieved. It can be widely applied to the monitoring of sewage outlets of factories and mining enterprises, the monitoring of imports and exports of urban sewage treatment plants, the monitoring of water quality of Rivers and Lakes, and the process control of sewage treatment facilities.

This product is a portable and desktop universal product.

2、 Performance characteristics

1. Large screen LCD backlit display, 240 * 128 dot matrix, pure Chinese operation interface, user-friendly program design.

2. The measurement range is wide and can be automatically switched according to the actual situation of the water sample.

3. The calibration mode from 1 o'clock to 7 o'clock automatically calculates slope, intercept, and correlation coefficient, with high measurement accuracy.

4. Intelligent design for fault self diagnosis makes instrument management and maintenance simple and convenient.

5. Large capacity data storage, capable of storing 30000 measurement results, with power-off protection design to ensure that the instrument is not damaged and data records are never lost.

6. Strong anti-interference ability, suitable for industrial sites.

7. It can be widely used for monitoring surface water and pollution sources.

8. Using a unique semiconductor cold light source emitter, the lifespan of the light source can reach tens of thousands of hours.

9. Can connect to a computer to export measurement data, and can connect to a printer to automatically print measurement data.

10. Low reagent usage, low operating costs, and strong anti-interference ability.

3、 Technical indicators

Curve parameters: 100 measurement curve parameters can be set;

Calibration: 1-7 point calibration mode, automatically correcting curve values;

Clock: Built in real-time clock, with a monthly cumulative error of less than 10 seconds;

Record storage: can store 10000 measurement results, data will never be lost in case of power failure;

Printing: Portable printer, directly printing measurement results (optional);

Communication method: RS232, which can upload measurement results to a computer for user statistical analysis;

Display: 240 * 128 large blue backlit display, Chinese operation interface;

Environmental temperature: (5~40) ℃; Environmental humidity: relative humidity<85% (no condensation);

Dimensions: 270 * 200 * 120mm; Weight of the whole machine is 1KG;

Working power supply: AC220V ± 10%/50Hz.

COD index

1. Determination method: Rapid catalytic method (chromium method);

2. Measurement range: 5-10000 mg/L (segmented or diluted measurement when>1000 mg/L);

3. Dual wavelength measurement: 5-150mg/L low wavelength; 100～1000mg/L, High wavelength;

4. Measurement error: 5-100 mg/L, absolute error ≤± 5 mg/L; 100 mg/L～10000 mg/L， Relative error ≤ ± 5%;

5. Dissolution temperature: 165 ± 1 ℃; Dissolving time: 15 minutes;

6. Anti chlorine interference: [CL -]<1000mg/L (>1000mg/L can be diluted for measurement).

Ammonia nitrogen index

1. Determination method: Nessler's colorimetric method;

2. Measurement range: 0-50mg/L;

3. Measurement error: ≤± 5%.

Total phosphorus index

1. Determination method: ammonium molybdate spectrophotometric method;

2. Measurement range: 0.01mg/L to 24mg/L;

3. Measurement error: ≤± 5%;

4. Dissolution temperature: 120 ± 1 ℃; Dissolving time: 30 minutes.

Total nitrogen index

1. Measurement method: photometric colorimetric method;

2. Measurement range: ≤ 100mg/L; Measurement error: ≤± 5%

3. Dissolution temperature: 125 ± 1 ℃; Dissolving time: 30 minutes.

Turbidity index

1. Measurement method: spectrophotometric method;

2. Measurement range: 0-400 NTU (segmented measurement when>100 NTU, dilution measurement for excess range);

3. Measurement error: ≤± 5%.