Abstract: An electronic triple point calibration system comprising in combination triple-point-of-water cells provided with means for sealing; a central thermowell provided in the heat conducting fixture for inserting thermometer being calibrated; a temperature probe installed on heat conducting fixture; and a housing for enclosing the heat conducting fixture and intimately mounted cells in a mounted combination. The cells are prepared from glass, polytetrafluoroethylene, or other material which does not react with water. After thoroughly cleaning, the cells are partially filled with pure water and vacuum sealed. A plurality of cells are intimately mounted on the heat conducting feature designed to accommodate the outer contours of the cells equally spaced around the central thermowell. The mounted combination with cells installed is frozen prior to testing.

Abstract: An in-line viscometer comprising in combination a flowsection, a flowmeter installed to measure flow through the flowsection, a friction flow tube installed parallel and suspended within the flowsection and having pressure ports on the respective entrance and exit ends of the friction flow tube. The pressure ports communicates with a meter for determining the differential pressure between the entrance port and exit port. The described structure provides the necessary values for determining viscosity in accordance with the following equation: ##EQU1## wherein .mu. is viscosity, P.sub.2 - P.sub.1 is differential pressure (.alpha.P), K.sub.c is a calibration constant, .rho. is fluid density, A is cross sectional area and Q.sub.T is flow rate through the friction flow tube and flowsection.

Abstract: A low flow calibrator in which a closed manifold type system is provided that includes a differential pressure transducer with null indication with valving means for opening the system to the atmosphere and for initially nulling the differential pressure transducer and then closing the system, the system includes means for connecting a source with a standard leak therein to the system and the system has an adjustable bellows for varying the volume of the system and for causing the differential pressure transducer to be adjusted to a null position after the system has been closed off by the valve means, and the system has a bourdon tube that can be mechanically adjusted to increase the volume of the system with indicator means being connected relative to the bourdon tube to indicate the amount of volume increase by actuating a closed end of the bourdon tube to enable the system to be used to calibrate the amount of leak from the source.

Abstract: A viscometer for use in making viscosity measurements under operating conditions. The viscometer includes a large turbine and a small turbine both operated by the in-line fluid flow. By operating the two turbines simultaneously a comparison of their output frequencies can be made to indicate the ratio point and the viscosity of the fluid flowing is determined from the ratio point.