(Oil bath) 
 KX-100B standard of COD (cr) digestion followed the international standard devices (ISO) and national standards (GB) of the basic principles to ensure that the heating of micro boiling reflux for 2 hours digestion operation, reagent solution preparation and the addition of both law and GB consistent, to ensure reliable and accurate analysis results. 
 The instrument uses computer technology for timing the heating temperature may be Conical digestion of 8 backflow while heating, the heating temperature 0-200 ℃ adjustable. The national standard GB11914-89 analysis of water quality norms to develop the chemical oxygen demand COD (cr) the determination of the steps and strictly the provisions of the method of heating digestion time, solution acidity, the amount of oxidant and catalyst conditions, such as indicators. Obviously, water COD (cr) was measured with the provisions of strict conditions, contrary to the provisions of operating conditions, will affect the measurement accuracy. 
 Instruments burr drain tube instead of glass ball return tube, oil bath heating, both water and make the equipment standardization, and also used to improve the safety of the instrument, each sample is heated uniformly and repeatable. 
 The chemical solution preparation equipment, operation and calculation of COD in full compliance with GB11914-89, less than 50mg / L of COD in water samples can be titrated by dilution and oxidizer to improve accuracy, higher than 1000mg / L of COD in water samples, can be dilution ratio of water to complete the determination. 
 Technical specifications: 
 Heating: oil bath 
 Measuring range: 0 ~ 1000mg / L, 1000 ~ 10000mg / L (water sample dilution) 
 Measurement time: less than 2h 
 Measurement error: potassium hydrogen phthalate standard solution (500mg / L), more than 5.0% relative standard unconservative 
 Industrial organic wastewater (500mg / L), more than 8.0% relative standard unconservative 
 Ambient temperature: 5 ~ 40 ℃ 
 Heating power: 2000W (AC 220V ± 22V, 50HZ)