Hach Company

Met One Instruments, Inc.

Gerald A Szpak

Kenneth L Girvin

Shawn A Hogan

Robert A Moss

Keith Bender

Thomas L Pottberg

A pulsation and particle suppressing continuous air flow system for air sampling instruments, particularly particle counters. An air pump occupies a portion of a sealed vacuum housing, with the other portion of the housing forming a surge chamber used to damp surges as the air pump attempts to pump air towards an air outflow port through an outflow pipe. The unoccupied volume of the surge chamber dampens or dilutes the surges at an air inflow port of the housing that is associated with an air sampling instrument, such as a particle counter. The air outflow port is associated with a filter for trapping particles originating inside of the air pump and associated motor while the interior of the housing itself traps particles originating outside of the air pump and motor.

Pulsation suppressing air flow system for an air sampling instrument

A mixer for analytical application mixes a container of fluid without a magnetic stir bar. A device for testing a liquid for particles can use the mixer. The mixing can occur in a sealed container, and liquid can be transmitted to the device from the sealed container.

Particulate tester with mixer for analytical application

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Grants Pass, OR, United States of America

Gerald A Szpak