Nbs Smoke Density Test Chamber by ISO5659-2 and ASTM E662

I. Nbs Smoke Density Test Chamber by ISO5659-2 and ASTM E662 The test method of NBS Smoke Density Test Chamber is derived from the National Institute of Standards and Technology NIST (predecessor of NBS) in the United States, and has been promoted and applied in many testing fields.This test method can be used to detect the smoke density level of plastic products,non-metallic materials in rail transit, non-metallic materials in ships, wire and cable products, etc.According to