Medium and Low Range Visual Systems
Self-Filling Amoules for Colorimetric Analysis (read below for Ultra Low Range)

CHEMets® ampoules are designed for maximum simplicity and accuracy. Use them for low- to medium-range colorimetric analysis. Each ampoule is 7 mm in diameter with a tapered, prescored tip.  Reagents are vacuum sealed inside.

The CHEMets® Method: The analyst immerses the CHEMet ampoule in the sample and snaps the tip. The correct volume of sample is drawn in by vacuum, and a small inert gas bubble remains. Sample and reagent are mixed by tilting the ampoule so the bubble travels from end to end. In 2 minutes or less, the resulting color is compared to the appropriate color standards to quantify the result.

 
Low Concentrations (Less than 1 ppm.)  In most cases the cylindrical comparator is used to quantify low concentrations. The filled test ampoule is placed in the center and compared with the eight color standards surrounding it.

Medium Concentrations (Above 1 ppm.)  The flat comparator is usually used for concentrations higher than 1 ppm. The analyst places the filled ampoule next to individual standards until a color match is found.

Ultra Low Range Self-Filling Ampoules for Colorimetric Analysis

ULR (ultra low range) CHEMets ampoules are designed for maximum simplicity and accuracy in testing low concentrations. Each ampoule is 8 mm in diameter and 250 mm in length with a tapered, prescored tip, and reagents are vacuum sealed inside.

The ULR CHEMets Method
The ULR CHEMet™ ampoule is immersed in the sample and the tip is snapped off. The correct volume of sample is drawn in, and a small inert gas bubble forms. Sample and reagent are mixed by tilting the ampoule so the bubble travels from end to end. In 2 minutes or less, the resulting color is compared to the appropriate color standards to quantify the result.
ULR CHEMets enable the user to mearsure concentrations at very low levels. A cylindrical comparator is used to read the test results. The filled test ampoule is placed in the center and compared with eight color standards around it.