Working Principle
The chemical cell method employs the principle of redox cells for oxygen analysis. The cell mainly consists of a cathode, an anode, and electrolyte, all sealed inside an inert housing.
When oxygen in the sample gas enters the cell, oxygen molecules gain electrons at the cathode. The anode is made of metallic lead, which loses electrons and gets oxidized. Electrons generated by the cell are conducted through a circuit, then compensated, corrected, and amplified to determine the oxygen content in the sample gas.
The reaction equations are as follows:
Alkaline Sensor
Cathode:
O₂ + 2H₂O + 4e⁻ → 4OH⁻
Anode:
2Pb + 4OH⁻ → 2PbO + 2H₂O + 4e⁻
Acidic Sensor
Cathode:
O₂ + 4H⁺ + 4e⁻ → 2H₂O
Anode:
Pb → Pb²⁺ + 2e⁻
Anwendungsbereiche
The SAU1550 trace oxygen analyzer is a new high-precision and multi-functional instrument. It can easily measure oxygen content at ppm levels in inert gases, weakly acidic, and weakly alkaline gases.
It is mainly applied to gas detection in industrial sites and laboratories, as well as accurate sampling and oxygen content testing at key process points in production lines. It is widely used for oxygen measurement in industries such as petrochemicals, industrial gas production, semiconductors, biopharmaceuticals, and food processing.
Main Features
Precise & Efficient
- Highly integrated gas circuit system with bypass design for fast contamination replacement and efficient testing.
- Constant pressure and constant flow regulation eliminate sample gas fluctuations, ensuring stable and reliable operation.
- Intelligent temperature-pressure dual compensation and full-range calibration provide accurate measurement data.
Safe & Durable
- Built-in pressure protection prevents sensor damage caused by overpressure or negative pressure.
- Integrated sealed structure reduces contamination and extends sensor service life.
- Maintenance-free sensor design.
Intelligent Operation
- 5-inch intelligent color touchscreen with graphic guidance, supporting Chinese, English, and German operation.
- Multi-display functions support multi-parameter and multi-window presentation, trend curves, maximum/minimum values, difference values, average values, and more.
Wide Application
- Strict EMC design adapts to complex industrial and commercial environments.
- Various gas circuit interfaces and communication modes support a wide range of applications.
Elegant Appearance
- Premium 19-inch standard chassis with a refined design for easy system integration.
