A mathematical method for temperature compensation of pH measurements.

A continuous recording viscometer using oscillating capillary tubes has been developed. The basic principles, general design, and construction details of the viscosity sensing device are given. Two such devices, mechanically coupled, comprise a bridge viscometer with which two fluids can be compared directly. A bridge viscometer complete with the electronic amplifier circuits is described. The general design is readily adaptable to automatic systems.The instrument has a wide dynamic range. The fluid under test may be allowed to flow through the system. The capacity of each arm of the viscometer bridge is less than 100 μl.