summary

One of the current methods for measuring oxygen is to use a completely sealed fuel pool oxygen sensor. The fuel pool oxygen sensor is composed of highly active oxygen electrodes and lead electrodes, immersed in a solution of KOH (excluding acid resistant types). At the cathode, oxygen is reduced to hydroxide ions, while at the anode, lead is oxidized.

applicationrange

MODEL 1080-EOElectrochemical oxygen analyzer can measure trace oxygen in organic gases such as high-purity hydrogen, nitrogen, argon, helium, methane, and propylene, as well as gases such as carbon monoxide and carbon dioxide. It can also measure oxygen content in complex industrial gases such as kiln gas, semi water gas, landfill gas, and chemical synthesis gas. Applied in standard gas production, steel cylinder gas analysis, tank car liquid nitrogen liquid argon analysis, online analysis of air separation equipment, online analysis of small nitrogen generators, metal milling equipment, glove boxes, coal gasification in fertilizer industry, waste treatment, chemical synthesis, scientific research and other fields.

measuring principle

One of the current methods for measuring oxygen is to use a completely sealed fuel pool oxygen sensor. The fuel pool oxygen sensor is composed of highly active oxygen electrodes and lead electrodes, immersed inKOH(Excluding acid resistant type)In the solution. At the cathode, oxygen is reduced to hydroxide ions, while at the anode, lead is oxidized.

O2+2H2O+4e->4OH-

2Pb+4OH- ->2Pb(OH)2+4e

KOHThe solution is separated from the outside by a polymer film, and the sample gas does not directly enter the sensor, so the solution and lead electrode do not need to be cleaned or replaced regularly. The oxygen molecules in the sample gas diffuse into the oxygen electrode through a polymer film for electrochemical reaction. The current generated in the electrochemical reaction is determined by the number of oxygen molecules diffusing into the oxygen electrode, and the diffusion rate of oxygen is proportional to the oxygen content in the sample gas. Therefore, the output signal size of the sensor is only related to the oxygen content in the sample gas, and is independent of the total amount of gas passing through the sensor. Through the connection of external circuits, the charge transfer in the reaction, that is, the magnitude of the current, is directly proportional to the oxygen participating in the reaction.

Instrument characteristics

Adopting fuel cell oxygen sensors, with high measurement accuracy, fast reaction speed, good stability, long service life, and maintenance free
Self-produced long-life probes (over two years) with low operating costs
Intuitive flow control

Pre set upper and lower limit alarm values for the oxygen content of the gas to be tested, with over limit light alarm and output contact switch signal

Measurement range:0～10～100ppm