The oxygen sensor consists of a fiber optic fluorescence probe with a proprietary thin film coating on its tip, and a blue LED as the excitation source. The high sensitivity AvaSpec miniature spectrometer completes the system.
The sensor uses a fluorescence technique to measure the absolute concentration of oxygen. An optical fiber carries the light produced by the blue LED to the thin film coating at the probe tip. Fluorescence generated at the probe is then reflected back to the detector. When oxygen in the gas or liquid sample diffuses into the thin film coating, it quenches the fluorescence. The degree of quenching correlates to the oxygen concentration.
The AvaSoft-OXY application software is used to both calibrate the sensor and monitor oxygen concentration.
A typical setup for oxygen measurements is given below:
Components used in the oxygen sensor setup are depicted in the following table:
Spectrometer
AvaSpec- 2048
Grating VA (350-1100nm), 200µm slit, DCL-UV, OSC
Software
AvaSoft-Full and AvaSoft-OXY
Lightsource
AvaLight-LED-470-P14
Fiber optics
FCB-UV600-2 Bifurcated probe UV/VIS, 2m, SMA
ME-FI-SM-MM Fiber interconnect
Oxygen probe
Different types available, contact us for more details
