Working PrincipleSensor adopt solid electrolyte cell Principle[ch65292]It is composed by the following solid cells[ch65306]Air[ch65292]Au|NASICON|| carbonate|Au, air[ch65292]CO2When the sensor exposed to CO2[ch65292]the following electrodes reaction occurs[ch65306]Cathodic reaction[ch65306]2Li + + CO2 + 1/2O2 + 2e - = Li2CO3Anodic reaction[ch65306]2Na+ + 1/2O2 + 2e- = Na2OOverall chemical reaction[ch65306]Li2CO3 + 2Na + = Na2O + 2Li + + CO2The Electromotive force[ch65288]EMF[ch65289] result from the above electrode reaction, accord with according to Nernst's equation:[ch65306]EMF = Ec - (R x T) / (2F) ln (P(CO2))P(CO2)--CO2--- partial Pressure Ec--Constant Volume R--Gas Constant volumeT-- Absolute Temperature [ch65288]K[ch65289]F--Faraday constantFrom Figure 1B[ch65292] Sensor Heating voltage supplied from other circuit , When its surface temperature is high enough , the sensor equals to a cell, its two sides would output voltage signal ,and its result accord with Nernst's equation[ch12290] In sensor testing, the impedance of amplifier should be within 100--1000G[ch937][ch65292]
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16