Tsi, Inc.

Dickey-john Corporation

Dahu Qi

Ronald W Steffen

Gregry C Miller

Peter P Hairston

Darrick L Niccum

Jim Evenstad

Darrick Niccum

In one example embodiment, a seed sensor is disclosed adapted to fit a conventional mounting location in existing seed tubes that provides improved performance by providing a wide light source (more LEDS), a wide photodetector and a current profiling scheme for the LEDs that provides more light at the opposite ends of the LED array. A result of such an arrangement is to improve seed resolution and to reduce seed spatial variability within the seed tube.

Seed sensor with lightpipe photodetect assembly

An apparatus and method for improving aerosol particle characterization and detection accuracy in clean room applications that includes an optical particle sizer that receives a particle containing aerosol sample at a higher flow rate which is operatively coupled to an inertial aerosol concentrator for concentrating particles received from the optical particle sizer and delivering a lower flow rate, particle enriched output. The system further includes an optical sensor for sensing of intrinsic particle fluorescence of the lower, particle-enriched flow, since intrinsic fluorescence is a useful indicator of biological particles and biological particle viability, including bacterial particles. The system as a whole provides a measure derived from a single inlet flow both of total particles and of viable microbial particles based on their spectroscopic properties.

Apparatus and system for simultaneously measuring particle concentration and biocontaminants in an aerosol particle flow

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Woodbury, MN, United States of America

Dahu Qi