Abstract: Described herein is an analyte detection device and method related to a portable instrument suitable for point-of-care analyses. In some embodiments, a portable instrument may include a disposable cartridge, an optical detector, a sample collection device and/or sample reservoir, reagent delivery systems, fluid delivery systems, one or more channels, and/or waste reservoirs. Use of a portable instrument may reduce the hazard to an operator by reducing an operator's contact with a sample for analysis. The device is capable of obtaining diagnostic information using cellular- and/or particle-based analyses and may be used in conjunction with membrane- and/or particle-based analysis cartridges. Analytes, including proteins and cells and/or microbes may be detected using the membrane and/or particle based analysis system.

Abstract: A measuring device having an elongated member with at least one measuring edge and a measuring indicia including successive groups of equally spaced color coded measuring marks located adjacent to and extending along the length of the measuring edge. Each successive group is identified by a different label. Each individual measuring mark corresponds to a selected fractional portion of the group wherein it is located and has a color which is different from all of the remaining measuring marks in the group and is the same color as the measuring marks in each successive group which correspond to the corresponding fractional portion in each successive group.