Particles Plus, Inc.

Hach Ultra Analytics, Inc.

Ivan Horban

David Pariseau

Bret Warrick

Michael M Carrabba

An airborne, gas, or liquid particle sensor with a mixed-mode photo-amplifier front-end. The photo-amplifier uses pulse-height for the high-gain channel and integrates the pulse-energy for the low-gain channel to provide for a larger dynamic range for larger size particles.

Mixed-mode photo-amplifier for particle counter

An airborne, gas, or liquid particle sensor with a pulse discriminator. The pulse discriminator provides greater qualification of signals associated with detected particulate signals.

Pulse discriminator for particle counter

A particle separation apparatus is disclosed. The particle separation apparatus may be for sample air stream preparation and delivery in particle detection systems. The particle separation apparatus may include a first vortex separator coupled to a second vortex separator for selecting particles in the air stream that are within a desirable size range for particle detection. The second vortex separator may further increase the concentration of particles within the desirable size range per unit volume. The particle separation apparatus may deliver the size-selected air stream to a detector, such as a laser-induced fluorescence detection system.

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Grants Pass, OR, United States of America

Ivan Horban