Fire and smoke in high-rise buildings is one of the main reasons that prevent people from escaping and lead to death. In modern high-rise civil buildings, there are many combustible decorations and furnishings, such ad plastic decoration, chemical fiber carpet, etc. These combustible materials will produce a lot of toxic smoke and heat during combustion. Therefore, knowing and mastering the smoke density produced by building materials is a very important link in the fire safety system of high-rise buildings.
NBS smoke density box test method, which originated from NIST (NBS predecessor of NBS) of American National Institute of Standards and Technology, has been popularized and applied in many testing fields at present. This test method can be used to detect smoke density grades of plastic products, rail transit nonmetallic materials, ship nonmetallic materials, wire and cable products, etc. Generally applicable standards are ASTM E662, ISO 5692-2 and NES 711 smoke density test method in military national standard.
The inner and outer walls of the instrument box are treated with Teflon coating, which is corrosion-resistant and has a long service life. Besides, the full-door humanized design can facilitate users to cleaned replace accessories with higher efficiency. Equipped with touch screen computer to monitor the whole test process, with high automation level. Other configurations are complete, making users feel at ease.

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