Oxygen Ozone Hydrogen Analyzer - Orbisphere Laboratories 3600 120.E

Oxygen Ozone Hydrogen Analyzer - Orbisphere Laboratories 3600 Principle of OperationOrbispheres patented polarographic oxygen or ozone sensor is constructed ofmetal electrodes immersed in an electrolytic solution. The electrodes are separatedby a gas-permeable membrane from the sample of interest. A guard ring electrodesurrounds the working electrode to shield against the influence of other gases andimprove sensor circuitry performs four functions:Applying a constant voltage to the anode,Measuring the current flowing through the sensor,Compensating this current for sample temperature variations,Converting these resulting signals into a scaled current or anode is held positive with respect to the cathode. Current flowing throughthe sensor due to oxygen or ozone reduction at the cathode is converted to avoltage by an amplifier, the proportionality between voltage and current beingdetermined by the feedback resistance of this output voltage is essentially a function of oxygen or ozone activity (partialpressure), temperature, and membrane permeability. Corrections for variations inmembrane permeability are made when the sensor is calibrated. The temperaturecompensation circuit takes care of temperature variations. Hence, the outputvoltage varies only with oxygen or ozone concentratio Unit bergaransi 1 minggu