1、 Instrument description:
DS-300B portable three in one water quality detectorBy combining classic colorimetric methods with computer technology and applying the principle of microcomputer optoelectronic colorimetric detection to replace traditional visual colorimetric methods, human errors are eliminated and measurement resolution is greatly improved.

DS-300B portable three in one water quality detectorThis product 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、 Main functional features:
● Dual LCD display, large screen LCD backlight display, 240 * 128 dot matrix, Chinese operation interface, user-friendly program design.
The measurement range is wide and can be automatically switched according to the actual situation of the water sample.
The measurement and digestion systems are designed separately, with independent power control, and the operation process can be carried out separately without affecting each other;
● Automatic constant temperature control system, PID regulation technology, constant temperature and high accuracy during the digestion process;
The calibration mode from 1 o'clock to 7 o'clock automatically calculates slope, intercept, and correlation coefficient, with high measurement accuracy.
Intelligent design for fault self diagnosis makes instrument management and maintenance simple and convenient.
The instrument has a built-in real-time clock, and each measurement record has a measurement timestamp for easy statistics and queries;
Large capacity data storage with power-off protection design ensures that the instrument is not damaged and data records are not lost.
Strong anti-interference ability, suitable for industrial sites, and can be widely used for monitoring surface water and pollution sources.
The instrument adopts a semiconductor cold light source emitter with an optical circuit design that has strong anti-interference ability, high measurement data accuracy, and good stability. The lifespan of the light source can reach tens of thousands of hours.
Equipped with a data output interface, it can be connected to a computer to transmit measurement data to the computer;
The instrument comes with a thermal printer that can directly print measurement data and historical data;
● Handheld box design, lightweight, aesthetically pleasing, and easy to carry;
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;
Low reagent usage, low operating costs, and strong anti-interference ability.

3、 Main parameters:
System parameters:
Simultaneous digestion of sample quantity: ≤ 4;
Dissolving temperature control range: ≤ 200 ℃, time control range ≤ 720 minutes, automatic timing;
Curve parameters: 100 measurement curve parameters can be set for each indicator;
Data storage: Each parameter can store 10000 pieces of measurement data;
Data calibration: 1-7 point calibration mode, automatically correcting curve values;
Environmental temperature: (5~40) ℃; Environmental humidity: relative humidity<85% (no condensation);
Working power supply: AC 220V ± 10%/50Hz; DC+16V, 20AH lithium battery;
COD parameters:
Measurement method: Rapid catalytic method (chromium method);
Measurement range: 5~5000 mg/L (diluted measurement when>1000 mg/L);
Measurement error: 5-100 mg/L, error ≤± 5 mg/L; 100 mg/L~5000 mg/L, relative error ≤± 5%
Dissolving temperature: 165 ± 1 ℃; Dissolving time: 10 minutes;
Anti chlorine interference: [CL-] ＜4000mg/ L；
Ammonia nitrogen parameters:
Measurement method: Nessler's colorimetric method;
Measurement range: 0-50mg/L;
Measurement error: ≤ ±5 %
Total phosphorus parameters:
Measurement method: Ammonium molybdate spectrophotometric method;
Measurement range: 0.01mg/L to 10mg/L;
Measurement error: ≤ ±5 %；
Dissolving temperature: 120 ± 1 ℃; Dissolving time: 30 minutes;

Note: It can be used as a two in one detector that combines three or any two indicators of COD, ammonia nitrogen, and total phosphorus