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Flexible Development Platform For Fluorescence Applications
Aug 2006
Ocean Optics Inc.Request Info
DUNEDIN, Fla., Aug. 9, 2006 -- The multifrequency phase fluorometer (MFPF) is a frequency-domain luminescence monitor for measurement of luminescence lifetime, phase and intensity developed by TauTheta Instruments LLC (, a Colorado-based developer of thin film fluorescence-based chemical sensors and multifrequency lifetime-based fluorimeters.

mfpf.gifThe MFPF uses LED excitation, avalanche photodiode detection and filter-based wavelength selection for simple experimental setup and control and, when used with Ocean Optics' oxygen sensors, helps to mitigate index effects, eliminate ambient light and improve system stability in dissolved oxygen applications.

Ocean Optics said the MFPF is especially useful for oxygen-sensing applications for which sensitivity to drift is important and sample setups must be undisturbed for long periods. Because it uses phase-shift technology, it is invariant to fiber bending and stray light, has broad dynamic range, generates very little optical and electronic crosstalk, and has low drift and phase noise. Built-in pressure and temperature measurement capabilities also make it suitable for luminescence sensor design, testing and calibration.

The MFPF can be configured with one- or two-channel LED excitation and detection, with modulation frequencies to 100 kHz. Luminescence lifetime measurements are possible from 200 to 0.3 microseconds; an onboard pressure transducer measures atmospheric pressure or external pressure with an optional hose fitting.

The single-channel MFPF comes with an LED for excitation, an avalanche photodiode for detection and a thermistor for temperature logging, calibration and temperature correction. The two-channel unit has two LEDs, photodiodes and thermistors; each unit has USB and RS-232 computer interfaces. Data can be saved in Microsoft Excel-compatible CSV format.

For more information, visit:; e-mail:

Ocean Optics
830 Douglas Ave.
Dunedin, FL 34698
Phone: (727) 733-2447
Fax: (727) 733-3962


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