Patent ID: 6571641
Filing Date: 2003-06-03
Classification: G05D

Abstract:
An on-line sensor mount assembly for installation in a mounting opening in a wall of a duct that is part of a process stream duct system carrying a free flowing particulate material in a duct channel, for use in measurement of a physical property of the material, comprising:a sampling housing having a side wall arrangement including vertical side walls defining a vertical passage with an upwardly open inlet end; said vertical passage having a substantially uniform cross section shape throughout the length thereof and defining a sensing chamber, said side wall arrangement including a flat front wall with peripheral dimensions larger than corresponding dimensions of the mounting opening in a duct wall for intended insulation of the housing with the edges of the front wall housing fastened to peripheral exterior edges of a duct wall mounting opening and the housing located in a duct channel to intercept through the inlet opening a sample of particulate material from a process stream; an outlet opening at the lower end of the housing; a flow metering apparatus having a movable flow metering element and a motor to drive the flow metering element; said flow metering element installed in blocking relationship between the sensing chamber of the housing and the outlet opening and positioned so that operation of the motor to continuously move the flow metering element is effective to continuously transport a particulate material from the sensing chamber through the outlet opening; said motor installed outside of the duct when the housing is installed in a duct channel and connected to the flow metering element through the duct wall.