Main feature
- Built-in four LED light sources of 420nm, 470nm, 620nm and 700nm, long life and high precision;
- Using spectrophotometry, built-in high and low chemical oxygen demand (COD), ammonia nitrogen, total phosphorus four test items;
- Support single-point and multi-point calibration, allowing users to edit calibration curves;
- Supports two measurement methods: absorbance and concentration;
- Support two reading modes: Smart-Read function (smart judging end point), Cont-Read function (continuous measurement);
- Each test item can store 200 sets of measurement results, conform to the GLP specification, and support data review, deletion and printing;
- Support USB communication, support connection to PC for data acquisition;
- Support battery power and USB power supply, support power management function, can be set to automatically turn off the light source and automatically shut down;
- IP65 protection grade, good waterproof and dustproof performance;
- Support firmware upgrade, support for factory reset, allow for function expansion and application expansion.
Technical Parameters
| model |
DGB-401 |
|
|
wavelength |
420nm； 470nm； 620nm； 700nm |
|
|
Measuring range |
Ammonia nitrogen |
(0.000 ~ 4.000) mg / L, can be extended to (0.000 ~ 300.00) mg / L |
|
Low concentration COD |
（0.0～150.0）mg/L |
|
|
High concentration COD |
（150～1500）mg/L |
|
|
Total phosphorus |
(0.000～1.000)mg/L, can be extended to (0.000～25.00)mg/L |
|
|
Basic error |
Ammonia nitrogen |
±10％ |
|
Low concentration COD |
±8％ |
|
|
High concentration COD |
±8％ |
|
|
Total phosphorus |
±10％ |
|
|
Repeatability |
Ammonia nitrogen |
±3％ |
|
Low concentration COD |
±3％ |
|
|
High concentration COD |
±3％ |
|
|
Total phosphorus |
±3％ |
|
|
stability |
Ammonia nitrogen |
The change of ammonia nitrogen concentration within 20min should be less than 0.200mg/L |
|
Low concentration COD |
The change of COD value within 20min should be less than 6mg/L |
|
|
High concentration COD |
The change of COD value within 20min should be less than 6mg/L |
|
|
Total phosphorus |
The change of total phosphorus concentration within 20min should be less than 0.050mg/L |
|
