The ASIAN Smoke Density Chamberis constructed essentially, the chamberconsist of a 14 gage aluminum box which is hinged a heat resistant glass glazeddoor. This box is mounted on the base which houses the controls. Dependent uponthe materials tested, the metal may require protection from corrosion. Thechamber is sealed except for 25 by 30mm (1by 9in.) openings on the four sidesof the bottom of the chamber