OxyMini OxyMicro
A new generation of fiber optic oxygen sensors based on luminescence lifetime
The OxyMini system is optimized for process control and biotechnology applications. The OxyMicro is designed for medical research applications including implanting into tissues, cell cultures, profiling of biofilms and sediment related bioassays. The measurement principle of the sensor system is based on the detection of oxygen concentration as a function of luminescence lifetime either in dissolved or gaseous phase environments.
Key Benefits
• Oxygen is not consumed during the experiment
• Immune to electrical and magnetic interference
• Excellent long-term stability
• No lengthy polarization necessary (e.g., as Clark-type oxygen electrodes require)
• Fast response time < 0.5 s for MicroTip sensors
• Probe size of MicroTip sensors as small as 50 µm
• Measurement is feasible in dry gas
• Optical isolation of sensor tip available for fluorescent or photosynthetically active samples
Measurement Principle
Conventional fiber-optic oxygen sensor systems based on intensity measurements are limited in their accuracy by light source stability and ambient light fluctuations. Using a luminescence lifetime detection, measurements are not affected by light source stability, intensity fluctuations caused by fiber bending or changes of the optical properties of the sample (turbidity, refractive index, coloration, etc.). These advantages make WPI’s OxyMini and OxyMicro the most advanced and reliable fiber-optic oxygen system available.

Calibration
The sensors can be calibrated by a simple two point calibration, 100% air-saturation and 0% air saturation.

OxyMini and OxyMicro oxygen meters
The OxiMini and OxyMicro fiber optic oxygen meters are compact, easy to transport. The instruments are designed for in/outdoor use and can be connected to a PC via a RS232 interface. Data can be visualized, analyzed and stored with the supplied software. A full range of sensors covering most biomedical applications are available.