Dissolved Oxygen measurement in theory and in practice

The handy A5 brochure offers a theoretical introduction into dissolved oxygen measurement and a multitude of practical tips

CONTENT

Fundamentals, Dissolved Oxygen Sensors

Calibration

• Calibration in water vapor-saturated air
• Calibration in air-saturated water
• The calibration process in the measuring meter
• Sensor test in water-vapor saturated air
• Sensor test in air-saturated water
• Sensor test using zero solution

Measurement and analytical quality assurance

• Cleaning and regenerating the sensor
• Unit and display of the measuring result
• Display as a concentration value
• Display as oxygen saturation percentage
• Potential error sources
• Polarization times (running-in time) before measurement
• Drift check (AUTOREAD)
• Importance of flow
• Salt content correction
• Impact of interfering gases
• Solubility function

Optical D.O. measurement

• The principle of optical measurement
• Characteristics of the optical dissolved oxygen sensors
• Calibration of optical dissolved oxygen sensors
• Cleaning of optical dissolved oxygen sensors
• Impact of interfering gases