QCOD-3E Type COD Analyzer
Sample is sealed digested in strong acid solution with potassium dichromate and special composite catalyst(add mercury sulphate as a masking agent when the sample contains chloride ion ), digestion temperature is 165ºC and time is 10 min. Potassium dichromate is reduced to trivalent chromium by organic matter in water. The amount of trivalent chromium is measured at 610nm, then convert it to the consumption of oxygen concentration.I Features
1 . The use of cold , monochromatic light source, excellent optical stability , without
interference of various light.
2 . Use PID control digestion temperature , high precision temperature control .
3 . Two-line LCD display, easy to operate .
4 . High temperature digestion and colorimetric ( including the host ) separating the
two parts , so that the temperature of the optical portion of the impact to a minimum .
5. High efficiency , one can digestion 20 water samples, water samples of each batch
measurement time is only about 20 minutes.
6. Remove each cuvette washing , cleaning is not completely avoidable situation .
7 . Power failure protection.
II Technical Parameter
1. Measuring range: 5~2000mg/L (three ranges: 5~100 mg/L, 100~1200 mg/L
and 1000~2000 mg/L) more than 2000mg / L can be measured dilution
2. Error: ≤±5 %
3. Repeatability: ≤3%
4. Anti-Chlorine Interference: ≤1200mg/L
5. Temperature precision: 165ºC±1.5ºC
6. Digestion time: 10min
7. Wavelength: 610nm
8. Optical stability: absorb shift ≤0.002A /20min
9. Sample quantity: 20
10. Dimensions: main unit: 210mm×280mm×190mm
11. Weight: main unit: 3kg; digester: 7kg
12. Power Consumption: <400W
13. Operating Condition:
Operating temperature range: 5~40ºC
Relative humidity: ≤85%
Power supply: AC(220±22)V;(50±0.5)Hz
No obvious vibration and electromagnetic interference, avoid direct
sunlight.III Packing List
1 Main unit 1pcs
2 Power cord 2pcs
3 Cable 1pcs
4 Fuse 2pcs In fuse reserve tank
under power socket
5 COD-special reagent 1pcs
6 Digestion tube 20pcs
7 Cuvette 2pcs
8 Shield 1pcs
9 Rubber dropper 1pcs
10 Test tube rack 1pcs
11 Manual 1pcs
12 Product certification 1pcs
13 Warranty card 1pcs
Yantai dongrun Instrument Co., Ltd. founded in 1998. It specializes in manufacturing online water quality analysis equipment, level meters, pressure gauges, flow meters, special temperature gauges and laboratory analysis equipment. Our company cooperates with Chinese Academy of Sciences and builds up a water analysis laboratory, mainly producing TOC analyzer, ammonia analyzer, fluorescence oxygen analyzer, etc. We have passed the ISO9001 certification. Our professional R & D team can provide technical supports to satisfy customer demand and our unique technologies can meet different working conditions. Dongrun, named by Shandong province science and technology commission, belongs to "high-tech enterprises", " Contract-credit and promise keeping enterprises","ISO9001:2008 quality management system authentication enterprise", " metrological management advanced enterprises of Shandong province ", "Metrological guarantee confirmation qualified enterprise" and We are the important supplier of Yantai Wanhua Group,Pepsi,Sinopec,Jereil etc.