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Material interface level sensing
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Measurement of solid particle concentration in a fluid stream responsive to magnitude and rate of change of a triboelectric probe output signal
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Ultrasonic material level measurement
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Material level indicating apparatus with status light and external test features
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Material level indicating apparatus with status light and external test features
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Material level indication
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System and method for ultrasonic measurement of material level
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Rotating paddle bin level indicator
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Liquid level measurement system
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Material level sensor with removable optics
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System for indicating a condition of material
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Shaft rotation monitoring apparatus
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Capacitance-type material level indicator
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DEVICE FOR OPTICAL MEASUREMENT OF A PRESELECTED PROPERTY OF A SUBSTANCE FLOWING IN A LINE
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Rotation paddle bin level indicator
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Ultrasonic antenna assembly
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Optical sight tube for fluid conduits
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Optical sight tube for flowing fluid materials
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Paddle for use in a rotating-paddle bin level indicator
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