Abstract: An apparatus for monitoring the concentration of dissolved gas in a liquid line comprises a heating element for causing the liquid in the line to boil at a localized point, a thermistor for measuring the temperature at the localized point at the instant of boiling, a pressure transducer for measuring the pressure of the line, and a programmable microprocessor for processing the temperature and pressure data provided by said temperature and pressure measuring means to determine the concentration of the dissolved gas in the liquid line.

Abstract: An apparatus for determining the amount of particle suspension in a fluid by measuring radiation reflection on the particles, comprises a beam of radiation directed into the fluid; first and second photovoltaic detectors for picking up at least a portion of the beam of radiation reflected from the particle suspension in the fluid; and a circuit for comparing the output of the first detector relative to the output of the second detector to obtain the amount of particle suspension in the fluid. The detectors are positioned such that the output of the first detector increases relative to the output of the second detector as the amount of particle suspension in the fluid increases.

Abstract: An electro-optical meter for indicating consistency of a liquid slurry, employs a light source and a detector of backscattered radiation. The light is caused to scan the slurry while holding the light intensity and the peak-to-peak value of the detected signal constant. The distribution of backscattered light is measured and the minimum to maximum intensity of backscattered light is controlled.

Abstract: A non-contact measuring apparatus for determining errors in concentricity between an elongated electrically conductive core such as a wire and an insulation coating thereon is disclosed. An optical scanning section produces an electrical signal proportional to the position of the coating at the same time that a capacitance section produces an electrical signal proportional to the position of the core. A comparator compares the two signals to yield a difference or error signal proportional to the error of concentricity and the result is continuously displayed to show the axis and magnitude of the error.

Abstract: A non-contact gage for continuously measuring the diameter of a moving member such as a wire or rod employs a source of radiant energy, a scanner and a radiant energy detector aligned across the path of travel of the member whose diameter is to be measured. Operation of the scanner causes a composite signal to be generated in the detector and a component of that signal is proportional to the diameter of the member. The diameter proportional component is separated electronically and fed to a read out device. Inherent non-linearities or inaccuracies such as may be caused mechanically by the scanner mechanism are electronically minimized or eliminated in the detection and display circuitry.