Oxygen Measurement Principles
There are numerous sensor technologies to measure oxygen concentration. Two of the most common methods are polarographic and optical. This series of articles explores principles behind each method and finishes with a side-by-side comparison.
Principles of Polarographic Measurement
Historically, polarographic sensors have been a common design for oxygen measurement. This article reviews the basic design principles of polarographic oxygen measurement.
The Membrane-Covered Clark Dissolved Oxygen Sensor
Moving from the basics of the polarographic sensor this article explores the origins of the Clark cell for dissolved oxygen measurement.
Sensor Output Signal
As polarographic sensors generate an electrical signal, this article explores the math used to determine the relationship between oxygen and current output.
Optical Dissolved Oxygen Sensors & Principles of Operation
As polarographic sensors are the traditional method for oxygen detection, optical oxygen sensors represent a new technology that can improve the measurement. Learn more about how they work.
Optical vs. Polarographic DO Sensors: Side-by-Side Comparison
As Hamilton produces both polarographic and optical dissolved oxygen sensors, we have a unique perspective that allows us to compare both measurement technologies.
Download Our O2 Measurement Guide
Get a better understanding of O2 measurement in Hamilton’s comprehensive O2 Measurement Guide.