Design principle
The DGB - 401 type multi parameter water quality analyzer measuring a total of three parameters: chemical oxygen demand (COD), ammonia nitrogen and total phosphorus, which COD divided into high and low concentration range two. Mainly used for water quality testing in the field of environmental protection.
The chemical oxygen demand (COD) measurement principle:
Potassium dichromate, spectrophotometry
The measuring principle of ammonia nitrogen:
Nessler's reagent - spectrophotometric method
The principle of measurement of total phosphorus
Ammonium molybdate, spectrophotometry
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Performance characteristics:
The 4 wavelength selectable, through a software upgrade, you can expand the number of environmental testing projects;
Support the user to edit the calibration results, the optimization of calibration curve, improve work efficiency;
The IP65 rating, the standard 6 Hole portable digestion device, a variety of power supply, convenient to carry and use;
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Product introduction:
A) using LED light, integrated four wavelengths, including 420nm, 470nm, 620nm, 700nm, small volume, long service life, high precision;
B) good man-machine interface, with interface to display the absorbance and concentration value; liquid crystal contrastadjustable;
C) balance and continuous measurement of 2 measurement modes, to meet different needs;
D meets GLP specifications),
Allows up to 200 user operator number;
Set the access range, according to the absorbance / concentration inspection);
To allow the current data / data / current display all data delete data;
Allow storage under different wavelength measurement data of the 200 sets;
Support print output.
E) calibration points to 20, self support standard curve of users; support the user to edit the calibration results, the optimization of the calibration curve, to avoid duplication of work (the user can manually modify the curve, including insert data points, delete data, modify the current concentration, modify the current absorbance;)
F) automatic shutdown (in min) function;
G) having the same time (in S) automatic control function, prolong the service life of battery
H) power-off protection function
I) USB communication interface, through the data acquisition software REX V2.0 can realize communication with the computer,
J) support and mobile power supply connection;
K) support to restore the default data, improve work efficiency;
L) IP65 waterproof function and portable toolbox;
M) two kinds of data input methods: timer input method and keyboard input method
N) supports two types of power supply: direct power supply of alkaline batteries and USB port (connect mobile power)
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Model
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DGB-401
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Technical indicators
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wavelength
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420nm; 470nm; 620nm; 700nm
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measuring range
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ammonia nitrogen
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(0.000~4.000) mg/L
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Low concentration of COD
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(0 ~ 150) mg/L
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The high concentration of COD
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(150 ~ 1500) mg/L
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total phosphorus
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(0.000~1.000) mg/L
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The basic error of the instrument
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ammonia nitrogen
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+ 10%
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Low concentration of COD
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+ 8%
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The high concentration of COD
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+ 8%
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total phosphorus
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+ 10%
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Repeatability of instrument
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ammonia nitrogen
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+ 3%
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Low concentration of COD
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+ 3%
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The high concentration of COD
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+ 3%
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total phosphorus
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+ 3%
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The stability of the instrument
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ammonia nitrogen
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The change of ammonia nitrogen concentration in 20min should be less than 0.200mg/L
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Low concentration of COD
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20min changes of COD value should be less than 6mg/L
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The high concentration of COD
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20min changes of COD value should be less than 6mg/L
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total phosphorus
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The variation of the total phosphorus concentration in 20min should be less than 0.050mg/L
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Serial number
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Name and specifications
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Number
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One
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DGB-401 type multi parameter water quality analyzer
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1 Taiwan
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Two
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Preparation: chemical oxygen demand (COD) determination reagent
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1
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Three
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Determination of Nessler reagent ammonia
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1
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Four
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Determination of total phosphorus - ammonium molybdate spectrophotometric reagent
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1
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Five
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Colorimetric tube
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1
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Six
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Digestion tube
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1
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