Two questions, two instrument families. How much smoke: the NBS chamber gives specific optical density for materials in transport and construction, while the 3-metre cube gives light transmission for cables. What is in the smoke: FTIR analysis quantifies the fire gases continuously, feeding the toxicity indices that railway and aviation methods require. Most smoke laboratories run a chamber and an FTIR interface together.
NBS Smoke Density Chamber
Specific optical density, flaming and non-flaming.
Smoke Density Tester
3-metre cube and D2843 configurations.
Smoke Toxicity FTIR
Quantitative fire gas analysis.
Which smoke number does your specification ask for?
Optical density (Ds) points to the NBS chamber; percentage light transmission points to the 3-metre cube; a toxicity index or gas list points to FTIR. If the specification names a standard, the instrument follows automatically - send the standard number with your inquiry.