NS-120 溶氧电极

NS－120溶 氧 电 极

·典 型 应 用
    广泛应用于水质处理、水文监测、废水处理、游泳池、鱼塘和化肥、化工、生物等领域的含氧量监测

·测 量 原 理
    NS－120型氧电极是一种隔膜式极谱（clark）型传感器。由传导性电解质连接的一个阴极和一个阳极组成。阴极与阳极间适当的极化电压可在阴极上将O2还原：
    阴极反应：O2　＋ 2H2O ＋　4e → 4OH-
    阳极反应：4Ag ＋　4Cl- → 4AgCl + 4e
    这些化学反应产生与所测量溶液中O2的分压成正比的电流。

·特 点
    ★反应灵敏，稳定性好
    ★无需要更换膜及电解液
    ★适用于各种恶劣水质，膜不易损坏、抗污染

·技 术 参 数
    测量原理：电流测量/极谱法
    检测极限： ﹤40ppb含氧量
    响应时间：25℃时含氧量下降90%﹤2min
    残余电流：无氧介质中残留的室温信号﹤满度的2%
    温度范围：测量时0～60℃
    压力范围：0～4bar
    电极信号：25℃时20～80nA（按客户要求定制）
    温度补偿：热敏电阻阻值按客户要求定制
    电极尺寸：直径12mm,长度120mm（PG13.5螺纹接口），可按客户要求定制
    电极材质：316L不锈钢壳体，POM膜帽
    透气膜：钢筛网增强的聚四氟乙烯及聚矽氧烷膜。

NS-120 dissolved oxygen electrode
* Typical Applications
    Is widely used in water treatment, hydrological monitoring, waste water treatment, swimming pools, fish ponds and fertilizer, chemical, biological and other fields to monitor the oxygen content of

* Measurement principle
    NS-120 type oxygen electrode is a diaphragm-type polarographic (clark) sensor. Connected by a conductive electrolyte, a cathode and an anode component. The cathode and anode polarization voltage between the appropriate O2 reduction at the cathode will be:
    Cathode reaction: O2 + 2H2O + 4e → 4OH -
    Anodic reaction: 4Ag + 4Cl-→ 4AgCl + 4e
    These chemical reactions produce the solution with the measurement of O2 partial pressure is proportional to current.

* Features
    ★ responsive, good stability
    ★ No need to replace the membrane and electrolyte
    ★ applicable to all kinds of poor water quality, membrane difficult to damage, anti-pollution

* Technical parameters
    Measuring principle: current measurement / Polarography
    Detection limit: <40ppb oxygen content
    Response time: 25 ℃ when the oxygen content decreased 90% <2min
    Residual current: oxygen-free medium at room temperature residual signal "full-scale 2% of
    Temperature range: 0 ~ 60 ℃ measurement
    Pressure Range: 0 ~ 4bar
    Electrode signal: 25 ℃, when 20 ~ 80nA (according to customer request)
    Temperature Compensation: thermistor resistance customized according to customer requirements
    Electrode size: diameter 12mm, length 120mm (PG13.5 threaded interface), according to the customer's requirement
    Electrode Material: 316L stainless steel shell, POM membrane cap
    Breathable membrane: Steel mesh enhanced PTFE and polydimethylsiloxane membrane.