gasometer

kaasukello puhekieltä An apparatus used to store or measure gas or the flow of gas, particularly in a laboratory setting. (defdate)
2012, Holger Ursin, Psychobiology of Stress: A Study of Coping Men (ISBN 0323158994), page 85:

The collected air was metered through a gasometer, and the composition of every gas sample was analyzed in duplicate (..)

The attack on the gasworks was probably the most risky, as none of the rebels had any idea of just what kind of blast an exploding gasometer might produce (..)