Abstract: A cell body having a pair of electrodes insulated from each other and adapted for direct immersion and use in commercial, laboratory, or industrial fluids or process streams, the cell being usable at temperatures below freezing and above the boiling point of water. The cell includes an insulated ultra pure antimony electrode and an insulated electrode of noble metal, the noble metal of the one electrode being immersed in the process stream as is the pure antimony electrode. The cell provides a self-contained solid state unit with the two electrodes adapted to measure pH in fluids or process streams containing solid mineral or ore particles, in acid, neutral or basic solutions of a wide range of temperatures and pressures, including vacuum applications and this system requires no external or internal reference or standard electrodes.

Abstract: A strain meter includes first and second blocks clamped to a rotating shaft with a linear variable differential transformer (LVDT) rigidly affixed to the first block and a displacement arm rigidly affixed to the second block. A LVDT core is attached to one end of the displacement arm and disposed to be movable without contact through the center of the LVDT. A flexible cable is connected between the displacement arm and the LVDT to control the radial position of the LVDT core. A vertical stabilizing bar is connected between the blocks and includes a cutout section adjacent the second block to allow for necessary flexibility for the second block to follow shaft motion. Information signals generated by the LVDT are telemetered off the shaft to a receiver.

Abstract: A multichannel salinity meter combines a semi-squarewave signal with a peak actuated detector to develop a salinity signal proportional to conductivity. Each salinity channel includes a separate presettable alarm level and alarm indicators provided by a blinking lamp at the salinity module, local and remote bells and a remote lamp. a bell cutout switch is provided to optionally silence the local and remote bell indicators. Each salinity channel provides a dump signal which may be used to control a dump valve whereby any alarm condition causes dumping of the water in the alarm channel. A test signal available to each salinity channel provides the instrument with a test mode.

Abstract: An electrical circuit for shaft torque measuring systems of the type having a transducer producing an electrical signal representing shaft torque and a brush and slip ring assembly providing an output connection for the electrical shaft torque signal includes an operational amplifier having the electrical shaft torque signal connected across an inverting input terminal and an output terminal with a capacitor providing negative feedback between the inverting input and output terminal and a resistor connected in series with the inverting input terminal to form with the capacitor a low pass filter such that resistance variations and circuit interruptions in the electrical shaft torque signal producing circuit do not adversely effect the output signal.

Abstract: A conductivity cell for measuring the conductivity of a liquid comprising a pair of spaced apart electrodes insulated from each other. The proper spacing of the electrodes is provided by a washer formed of insulating material and it is strong, rigid and highly stable chemically and mechanically and is substantially unaffected by wide temperature variations. A single electric conducting element extends through the cell and at one end is electrically fixed to one of the electrodes. The single electric conducting element is adjustable to maintain the two electrodes and insulating washer in proper position. A protective and insulating shield is provided for detachable connection to the conductivity cell to protect the electrodes.