Smoke Density Test: ISO 5659 VS ASTM E662
ISO 5659-2 and ASTM E662 are used to measure the smoke density generated from burning materials. Both test methods use the same test chamber and photometric system.
The most obvious difference between the two is that use different kinds of radiant heat sources. It leads to different test results which are not comparative.
What is the NBS Smoke Density Chamber?
The NBS Smoke Density Chamber measures the specific optical density of smoke generated by the materials using an essentially flat specimen (up to 25 mm thick) exposed to a specific radiant heat source (normally 25 or 50 kW/m2), in a closed chamber, with or without a pilot flame.