Each Test Ampoule contains a carefully measured quantity of titrant sealed under vacuum. The sealed tip is fitted with a miniature
valve that is used to control the flow of sample fluid into the ampoule as the handler performs what is known as a "reverse titration."
Sample fluids are drawn into the ampoule in small increments (with mixing) while the handler watches for a color change
from red/orange to blue. When that change occurs, the ampoule is placed in an upright position and the test result is read
opposite the location of the liquid level, using a scale printed on the side of the tube.
The entire process requires only a minute or two and avoids all the equipment hassle and clean-up
associated with ordinary procedures.
