Location -> Industrial online analyzer -> 5.Dissolved oxygen meter
Type：Dissolved oxygen electrode
Illustrate：It is widely use in the applications like water treatment , hydrological monitoring , wastewater treatment ,swimming pools fish ponds and fertilizer .
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
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