multi-parameter water quality analyzer

Model No.: DGB-401

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