MicroOptode

Unisense now offers optode sensor technology with full integration to our existing laboratory systems. The optical sensor technology gives you a cost-effective and robust oxygen sensor that can be applied a great number of applications. Simple two-point calibration and temperature compensation ensures ease-of-use, and the Unisense software suite allows you to combine the oxygen MicroOptode with our wide selection of microsensors (e.g. H₂, H₂S, N₂O, NO, pH, redox and more). 

 

The oxygen optode is designed for research applications within: 

• Respiration
• Biomedical
• Bulk and Bioreactors
• Environmental sciences
• Profiling

The MicroOptodes are used with our 1 ch Opto-F1 UniAmp, 4 ch Opto-F4 UniAmp or 2 ch Field MicroOptode Meter.

Oxygen optode principle: 

The measuring principle of the oxygen optode is based on in-house technology and delivers unparalleled performance within our core application segments. By quenching of the luminescence caused by collision with oxygen molecules, the oxygen concentration can be determined. More oxygen molecules will result in a lower emission signal, giving a measure of the oxygen concentration in the sample. Combined with our new Opto UniAmp systems the improved sensor technology gives you following advantages:

• Zero-noise temperature compensation
  - Accurate oxygen quantification by unmatched temperature compensation
• Ambient light filtering technology
   - Improved performance under fluctuating ambient light conditions, eg in situ
• Bleach-protection
   - Novel multi-component modulation improves life-time with 50%
• 50 µm tip
  - Optimized design for true microprofiling
• Fast 430 µm Sensor
  - For EddyCovariance and other applications requiring <0.3s response times
• Robust 3000µm sensor for bulk and long-time monitoring applications
• E²PROM
  - Plug'N'Play with unique sensor identification and calibration retrieval

The optode fiber is build into a steel needle; this allows you to retract the fiber into the needle for complete protection e.g. when piercing a rubber septum. When the needle tip reaches the measuring site, the fiber can be pushed out into the sample and measure the oxygen concentration.
Customized versions with fixed exposure for e.g. profiling application and Eddy Covariance is also available.