Abstract: A system for determining particle size of a quantity of a sample material contained in a sample material holder is disclosed, where the sample material is made up a plurality of the particles. The system may incorporate a pressure regulating subsystem for receiving a first pressurized airflow signal and regulating the first pressurized airflow signal to a second pressurized airflow signal having a pressure lower than the first pressurized airflow signal, the second pressurized airflow signal configured to be input to a first end of the sample material holder. A mass airflow transducer may be incorporated for determining a flow rate representing an air flow value entering the sample material holder. A control module uses the air flow value in combination with the pressure differential value and mathematically determining a dimension of the particles making up the sample material.

Abstract: A system for determining particle size of a quantity of a sample material contained in a sample material holder is disclosed, where the sample material is made up a plurality of the particles. The system may incorporate a pressure regulating subsystem for receiving a first pressurized airflow signal and regulating the first pressurized airflow signal to a second pressurized airflow signal having a pressure lower than the first pressurized airflow signal, the second pressurized airflow signal configured to be input to a first end of the sample material holder. A mass airflow transducer may be incorporated for determining a flow rate representing an air flow value entering the sample material holder. A control module uses the air flow value in combination with the pressure differential value and mathematically determining a dimension of the particles making up the sample material.

Abstract: A collapsible, ground-supportable, manually transportable carrier includes a container and transport handles attached to a front end of the container. The container is formed of a plurality of detachable container sections, with adjacent sections being interconnected by a transverse hinge extending along floor portions of the container sections. The hinge comprises hinge elements inter-fitted together and rotatable relative to one another to a position enabling the container sections to be detached from one another. Tensioned cables extend along upper edges of the carrier side wall to oppose pivoting of the hinge elements and thereby maintain the container sections interconnected. The carrier can be ground-supported directly on a floor of a rear container section, or ground-support wheels can be mounted on that rear container section. The container sections, when disassembled, can be nested together, one inside of the other.