Colorimeter test kit apparatus

Claim 1

A colorimetric test kit apparatus comprising a color tube which includes a transparent plastic tubular container having one end closed and leak proof, said tube being provided with an array of non-opaque color windows on its surface, the color of the color windows being selected to at least approximately match the colorimetric response of a measured sample of fluid under test, which color tube can be filled with the fluid under test so as to correct the color of the color windows for any initial coloration of the fluid under test; at least one transparent plastic tubular sample container marked with a sample level line to be used as a sampler vial to provide an accurately measured sample of the fluid under test; at least one hermetically sealed tubular reagent vial containing a chemical reagent; puncturing means for opening said vial to provide a hole of predetermined size to convert it to a dropper to dispense said chemical reagent drop by drop into the measured sample in the sampler vial to develop a colored sample which can be held adjacent to one color window at a time to find the best color match; said tubular reagent vial being disposed in said sampler vial and said sampler vial being disposed in said color tube in a nesting arrangement so that said color tube becomes a holder for the complete test kit when not in use; and removable cap or plug means for closing said color tube, said cap or plug being of a form and size such that the complete test kit can be positioned by hanging closely alongside similar kits to present a conveniently accessible array of colorimetric test kits such as may be required in analyzing a given fluid.