Page 94 - Gas Adsorption Equilibria

80 Chapter 2

different types of instruments, normally operating around or below ambient
pressure, have been designed for this purpose including static, gas flow and
differential gas flow instruments. An overview is given in [2.2]; a list of
commercial suppliers which in no way is meant to be exclusive or complete is
given in Table 2.1 below, cp. also [2.3, 2.4, 3.7].