OxyTrans TR | In-line Dissolved Oxygen (DO) Meter

In-line Optical Dissolved Oxygen (DO) Meter

OxyTrans TR is an optical inline sensor for the continuous measurement of dissolved oxygen (O₂) in liquids and gases. It is designed for applications that require high sensitivity and high measurement accuracy – with straightforward operation and low-maintenance design.

Unlike conventional electrochemical sensors, the OXYTRANS TR does not require an electrolyte solution. During measurement, no oxygen is consumed.

The O2-concentration can be displayed in different units like ppb, ppm, %oxygen, etc.

A Closer Look

The optical principle of measurement is based on dynamic luminescence quenching by molecular oxygen. The indicator layer on the glass installed in the measuring head is illuminated with a blue-green-light. Using the energy of this blue-green light, the indicator molecules are elevated to an excited state. As this indicator molecules return to their normal state they emit a red light. This red light is detected by the internal detector.

The key principle of measurement is this: If oxygen is in the medium, this luminescence effect is prevented as the blue-green light energy is absorbed by the oxygen molecule and not the indicator molecule. As a result, the indicator molecule does neither absorb the blue-green energy nor emit the red energy. The measured luminescence then decreases in a linear relationship to the oxygen concentration.

Applications

Dissolved oxygen has a negative effect on flavor stability and shelf life– which is why stable inline monitoring in the process is essential.

The OxyTrans TR is used for measuring O₂ in:

• Deaerated water
• Wort
• Beer
• CO₂