Profile: Russell Scientific Instruments Ltd. is a manufacturer of precision thermometers and scientific measuring instruments. Our products include precision thermometers, barometers, barographs, and other scientific measuring instruments for industrial, meteorological, domestic, and other uses. Our float switches are designed for the automatic control of electrically driven pumps. Hygrometers are used to measure the relative humidity of the air. Our meteorological thermometers are used for measuring the temperature of the atmosphere, and are primarily in the form of maximum, minimum, or normal reading thermometers.