1、 Product Overview

This instrument is specially designed by our company for monitoring and supervision personnel to measure various water sample indicators on site. This instrument has the characteristics of automatic PID temperature control, dual LCD display, AC/DC dual-use, automatic zero adjustment, concentration direct reading, curve storage, automatic printing, etc. The instrument is easy to operate, human-machine interactive operation, and users can apply this product without complex professional knowledge.

2、 Performance characteristics

1. Dual LCD display, pure Chinese operation interface, user-friendly design, user-friendly human-computer interaction interface;

2. Optical circuit design, strong anti-interference ability, high measurement data accuracy, and good stability;

3. Automatic constant temperature control system, PID regulation technology, constant temperature and high accuracy during the digestion process;

4. The instrument can automatically calibrate the measurement curve, automatically zero, and is easy to operate;

5. The determination and digestion systems are designed separately, with power supply control, and the operation process can be carried out separately without affecting each other;

6. The instrument is equipped with a built-in DC power supply and lithium battery power supply, which can achieve heating, digestion, and colorimetric determination of multiple batches of water samples;

7. The measurement light source adopts a cold light source, which has a long lifespan, small drift, and long lifespan;

8. The instrument has a built-in real-time clock, and each measurement record has a measurement timestamp for easy statistics and queries;

9. It has a data output interface that can be connected to a computer to transmit measurement data to the computer;

10. The instrument comes with a thermal printer that can directly print measurement data and historical data;

11. Handheld box design, lightweight, aesthetically pleasing, and easy to carry.

3、 Technical parameters

1. Dissolve quantity: ≤ 4 tubes;

2. Temperature indication error: ≤ ±1℃；

3. Uniformity of temperature field: ≤ 2℃；

4. Error in digestion time indication: ≤ ±2%；

5. Curve parameters: 100 measurement curve parameters can be set;

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

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

8. Record storage: It can store 30000 measurement results without losing data when powered off;

9. Printing: Comes with a built-in printer to print measurement results at any time;

10. Communication method: RS232， The measurement results can be uploaded to a computer for easy statistical analysis by users;

11. Display: 240 * 128 large blue backlit display with Chinese operation interface;

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

13. Working power supply: AC220V ± 10%/50Hz, DC 16V lithium battery;

14. Dimensions: 400 * 300 * 200mm, weight: 8kg.

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 to 10000 mg/L, relative error ≤± 5%;

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

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; Automatic timing.

Total nitrogen index

1. Measurement method: photometric colorimetric method;

2. Measurement range: ≤ 100mg/L；

3. Measurement error: ≤ ±5 %；

4. Dissolution temperature: 125 ± 1 ℃; Dissolving time: 30 minutes; Automatic timing.

Nitrate nitrogen index

1. Determination method: Chromogenic acid colorimetric method;

2. Measurement range: 0.01mg/L to 100mg/L (segmented measurement for>20mg/L, dilution measurement for excess range);

3. Measurement error: ≤ ±5 %；

Nitrite nitrogen index (optional)

1. Determination method: N - (1-naphthyl) - ethylenediamine photometric method;

2. Measurement range: 0.01mg/L to 12mg/L (segmented measurement when>0.3 mg/L, dilution measurement for excess range);

3. Measurement error: ≤ ±5 %；

Suspended solids index (optional)

1. Measurement method: spectrophotometric method;

2. Measurement range: 0-500mg/l (>500mg/l can be diluted for measurement);

3. Measurement error: ≤ ±5 %；

Turbidity index (optional)

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 %；

Chromaticity index (optional)

1. Measurement method: spectrophotometric method;

2. Measurement range: 0-500 degrees (>500 degrees can be diluted for measurement);

3. Measurement error: ≤± 5%;