CXNS-120  Dissolved oxygen electrode

·Application
It is widely use in the applications like water treatment , hydrological monitoring , wastewater treatment ,swimming pools fish ponds and fertilizer .

Chemical ,biological and other fields about the oxygen content monitor .

·Measuring principle

NS-120 type oxygen electrode is a diaphragm polarographic (clark) sensor . Byconductibility electrolyte which connect one cathode and one anode to compose .Between the cathode and the anode ,the proper polarization voltage can deoxidize the O2 at the Cathode electrode .

Cathode reaction：O2＋ 2H2O ＋4e → 4OH-

Anode reaction :：4Ag  ＋4Cl- → 4AgCl + 4e

These chemical reactions produce the current which is proportional to the O2 in the measured solution’s partial pressure .

·Feature

★  Sensitive response ,good stability

★  Do not need to replace the diaphragm and the electrolyte .

★  Suitable for variety of waste water , the diaphragm is difficult to be damaged, anti-pollution .

 

·Technical parameters

Measuring principle :current measurement/polarography

Detection limit <40ppb oxygen percent

Response time :the oxygen content decreased 90%<2min ,when the temperature is 25 Celsius degree Residual current :the residual room temperature signal<2% FS in the anaerobic medium  

Operating temperature :0～60℃

Pressure：0～4bar

Electrode signal : 20～80nA at 25 Celsius degree (can customize under the requests)

Temperature compensation : thermal resistance value can customize it under the user’s requests.

Electrode size :diameter (12mm) ,length(120mm)(PG13.5 screw thread interface), can customize under the requests

Electrode material :316L stainless steel shell ,POM diaphragm cap .

Permeable membrane :enganced steel mesh PTFE and polysiloxane film