1
Fitzgerald J Vincent, Matusik Frank J, Oppliger Hans R: High precision wide dynamic range viscous loss measuring apparatus. National Metal and Refining Company, January 23, 1973: US3712117 (32 worldwide citation)

A viscosity measuring system especially useful in pollution and chemical process control applications. A variable gain amplifier drives a magnetic coil which causes a torsion member to oscillate. The amplitude of the oscillations is sensed by a transducer, and converted to a DC voltage by an amplitu ...


2
Oppliger Hans R: High precision wide dynamic range viscous loss measuring apparatus. National Metal and Refining Company, January 16, 1973: US3710614 (19 worldwide citation)

A viscosity measuring system especially useful in pollution and chemical process control applications. A variable gain amplifier drives a magnetic coil which causes a vibratory member to oscillate. The amplitude of the oscillations is sensed as an AC voltage by a transducer, and converted to a DC vo ...


3
Fitzgerald J Vincent, Matusik Frank J, Oppliger Hans R: High precision wide dynamic range viscous loss measuring apparatus. October 2, 1973: US3762429 (13 worldwide citation)

A viscosity measuring system especially useful to pollution and chemical process control applications. A variable gain amplifier drives a magnetic coil which causes a torsion member to oscillate. The amplitude of the oscillations is sensed by a transducer, and converted to a DC voltage by an amplitu ...