・ This small type is filled with two layers of 20-40 mesh silica gel (sorbent) weighing 75 mg and 150 mg.
・ It is strongly adsorbent with respect to polar compounds, so it can be used for measuring the concentration of organic solvents in work environments.
・ There are two layers, so the amount of breakthrough during measurement can be determined.
・ It is comparable to the items designated for measurements of amines and NIOSH.
・ The glass tube has been pre-scored to make it easier to cut.