The Digox optical is a modern measuring instrument for the determination of dissolved oxygen and functions according to the principle of dynamic fluorescence quenching. The instrument uses neither a membrane nor an electrolyte and is also independent of the carbon dioxide concentration of the sample as well as the sample flow. Additional features are the low maintenance requirements and the long operating time.
A blue light source excites a luminophore in the sensor cap. Electrons of the luminophore absorb the energy of the incident blue light and are lifted to a higher energy level. Within a very short period of time (microseconds), the electrons fall back to a lower energy level, emitting energy in the form of a red light.
Oxygen absorbs the energy of the excited electrons of the luminophore and thus influences the intensity of the emitted red light as a function of the oxygen concentration in the sample. In addition, the presence of oxygen accelerates the rate at which the electrons leave the higher energy level.
Consequently, both the intensity and the decay time of the emitted red light are inversely proportional to the oxygen concentration in the sample.
- Simultaneous measurement of dissolved oxygen, temperature and sample flow rate
- Easy installation, low maintenance and long operating time
- Analog and digital outputs
- Communication via Profibus (option)
- Integrated flow measurement
Oxygen plays a crucial role in the water-steam cycle of power plants. To prevent corrosion on boilers, pipes and turbines, the oxygen concentration must be continuously monitored.
The Digox 6.1 reliably offers
the highest level of accuracy and safety here.