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Name:	DGB-42X series photoelectric colorimetric water quality analyzer
Ammonia:	0.000~4.000mg/L
Water hardness:	0.000~500.0mg/L
Urea:	0.000~5.000mg/L
Residual chlorine/total chlorine:	0.000~5.00mg/L
Permanganate index:	0.000~10.00mg/L
Aluminum:	0.000~0.3mg/L
Total phosphorus:	0.000~1.000mg/L

Measuring parameters	Measuring method	Wavelength	Measuring range（mg/L）	Accuracy	Repeatability	Detection limit	Model
Ammonia	Nessler's reagent method	420nm	0.000~4.000	≤±10%	≤3%	≤0.03mg/L	DGB-422
Water hardness	Calcium magnesium reagent method	470nm	0.000~500.0	±5mg/L±5% indication mg/L	≤2.5％ or 0.5%FS	≤1%FS	DGB-423
Urea	Diacetylmonooxime-antipyrine spectrophotometry	470nm	0.000~5.000	≤1mg/L: ±0.1mg/L ＞1mg/L: ±5%	≤3%	≤0.05mg/L	DGB-423
Residual chlorine/total chlorine	DPD colorimetry	520nm	0.000~5.00	≤1mg/L: ±0.05 mg/L ＞1mg/L: ±5%	≤2.0%	≤0.02mg/L	DGB-424
Permanganate index	Acid potassium permanganate oxidation method（colorimetry）	540nm	0.000~10.00	±5%FS	≤2.0％	≤0.5mg/L	DGB-425
Aluminum	Chromazurol S Spectrophotometry	620nm	0.000~0.3	±0.015mg/L	≤0.005mg/L	≤0.01mg/L	DGB-427
Total phosphorus	Molybdate spectrophotometry	650nm	0.000~1.000	±10%	≤3.0％	≤0.050mg/L	DGB-428

● LED test technology, small size, stable signal;

● LCD liquid crystal display, with backlight, LCD contrast and backlight time can be adjusted;

● It has a good Chinese man-machine interface and supports IP65 protection level;

● Automatically lock the measurement value, read the measurement result directly, without conversion;

● Easy to operate, you can directly use the colorimetric tube as a measuring container;

● Built-in calibration curve for direct measurement;

● Support multi-point calibration (up to 5 points) to meet high-precision measurement requirements;

● Support GLP specification to meet data storage, access, deletion and printing functions;

● With automatic shutdown function and power failure protection function, the automatic shutdown time can be set to reduce power consumption and ensure data security;

● Support battery power supply (4 AA alkaline batteries) or USB port direct power supply;

● With USB interface, it supports connection with PC, printer, etc.;

● Support firmware upgrade, allow function expansion and application expansion, to meet the measurement needs of special users;

● Colorimetric tube specifications: outer diameter 16mm* length 100mm, capacity 10ml

● Size: 220×85×50mm;

● Weight: about 0.4kg;

● Operating environment: 5～35℃; 0～85% relative humidity.

DGB-42X series photoelectric colorimetric water quality analyzer adopts new LED test technology, integrated LED light source with specific absorption peak wavelength, built-in standard curve, and directly uses colorimetric tube as the measuring container. It is small in size and convenient for users to operate and carry. This series of products can measure water hardness and urea parameters (this series of instruments can be expanded and customized for ammonia nitrogen, total phosphorus, permanganate index, aluminum, total hardness, residual chlorine, total chlorine, chlorine dioxide, urea and other project parameters) , Suitable for on-site measurement or laboratory analysis of surface water, industrial wastewater, medical wastewater, landscape water for sewage regeneration, drinking water, swimming pool water and other water quality.

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