Abstract: A viscosimeter having a first cell containing mercury or other electrically conductive fluid, a second cell containing a sample of fluid of unknown viscosity, and a pair of passages interconnecting the ends of the cells to form a closed circuit. A plurality of electrodes extend into the second cell in spaced relationship with each other along the cell's axis and are connected to an electrical circuit. Upon the opening of valves in the two passages, the conductive fluid urges the sample fluid through one of the passages and flows through the other passage into sequential contact with the electrodes in the second cell. The electrical circuit detects the rate of movement of the conductive fluid past the electrodes and produces an output signal related to the viscosity of the sample.

Abstract: A flame photometric detector for use with a gas chromatograph comprises a burner to produce a cool hydrogen flame and excite molecules of the gas sample to emit light characteristic thereof, a transparent chimney surrounding the burner and flame to enhance characteristic light emission, a selective light filtering means, and sensing means positioned so as to exclude the flame from its sensing area. The device and method of operation are characterized by a substantially broader range of detection and measurement than is possible with present commercially available equipment.