The Standard Midget Impinger—Design Improvement and Miniaturization

Replacement of the ring seal with an “O” ring joint to support the impinger tube in the head of the all-glass midget impinger alleviated the breakage problem, permitted lateral adjustment of the orifice to impinging surface, and provided interchangeable orifices. A third side-vent “O” ring seal permitted direct series assembly, or connection to other assembly tubes. A miniature model based on threefold reduction in the improved midget impinger dimensions operated efficiently with one-fifth the flow rate, sample volume, and reagent volume. Aniline vapor, sulfur dioxide, and dust collection results confirmed performance equivalent or superior to standard midget impinger operation.