ASTM E 662 Nbs Smoke Density Tester

Smoke box (smoke density chamber) measures optical density of smoke generated from test sample when test sample of certain thickness is exposed to heat source(2.5wcm2, 25kwm2 using by e 662 furnace) or fire in a chamber.
this equipment is satisfied with standards (astm e 662, bs6401, iso 5659, nes 711, nepa 258, etc).
Using iso 5659 conical radiant heat furnace, we can change the heating condition from 10 kwm2 to 50kwm2or 70kwm2 by user.
In the test of nes 711, there are non-flaming test and flaming test in test conditions different from astm e 662.
This test method is increasingly used in interior material of rolling stock, low power incombustible cable and interior film, etc.