Kellukemittareissa

Kellukemittareissa, commonly translated as "bell meters" or "bell gauges," are instruments used to measure the presence and concentration of specific gases, often in industrial or laboratory settings. Their operation typically relies on a bell-shaped apparatus submerged in a liquid, usually water. As a gas is introduced and collected within the bell, it displaces the liquid, causing the bell to rise. The degree to which the bell rises, or the volume of liquid displaced, is then calibrated to indicate the volume or concentration of the collected gas.

These devices are particularly useful for measuring gases that are insoluble or only slightly soluble in the liquid medium. The principle of operation is analogous to that of a gasometer, but on a smaller and often simpler scale. Kellukemittareissa can be used for monitoring air quality, analyzing combustion products, or in chemical reactions where gas evolution needs to be quantified. Their simplicity and visual nature make them relatively easy to operate and interpret, although accuracy can be affected by factors such as temperature, pressure, and the solubility of the gas in the chosen liquid. Variations in design exist, with some incorporating more sophisticated measurement scales or automatic recording mechanisms.