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ISO 5659-2 with EN 17084: Smoke Density Chamber with Toxicity Analysis
ISO 5659-2 with EN 17084: Smoke Density Chamber with Toxicity Analysis
The NBS Smoke Density Chamber is one of the most widely used instruments for measuring smoke generation from burning materials such as building materials and non-metallic components used in railways, marine vessels, and aircraft.
The NBS Smoke Density Test is intended primarily for research, development, and fire safety engineering in buildings, trains, ships, and similar applications. It is not designed as a basis for building code ratings or other regulatory purposes. The test results do not predict the actual smoke density that may occur when materials are exposed to heat and flame under real-world conditions.
The following parameters can be reported from the smoke density test:
Specific optical density: Dsmax, Ds10, Ds1.5, Ds4.0
Clear-beam correction factor (Dc)
VOF4
Results according to different standards
Gas Concentrations (ISO 17084):
Measured in parts per million (ppm) or percentages.
Includes critical gases such as:
Carbon Monoxide (CO)
Carbon Dioxide (CO₂)
Hydrogen Chloride (HCl)
Hydrogen Cyanide (HCN)
Sulfur Dioxide (SO₂)
Nitrogen Oxides (NOx)
hydrogen bromide (HBr)
hydrogen fluoride (HF)
ISO 5659-2 Smoke Density Test Chamber
Construction: Heavy-duty stainless steel chamber with internal dimensions of 914 mm × 914 mm × 610 mm.
Internal Finish: Inner surfaces coated with Teflon® for resistance to chemical attack and corrosion, and for ease of cleaning.
Access Door: Full-opening door for convenient specimen loading and chamber cleaning.
Observation Window: Door incorporates a sealed observation window with an opaque removable cover to block ambient light during tests.
Temperature Stabilisation: Chamber walls may be pre-heated to achieve stable initial conditions before testing.
Safety Device: Explosion-relief panel, easily replaceable, for safe operation under combustible sample conditions.
Optical Windows: Two precision optical windows (75 mm diameter) mounted horizontally opposite each other for light transmission measurements.
Light Measurement System: Consists of a calibrated incandescent lamp and photomultiplier tube. Includes a range-extension filter to maintain measurement accuracy over the full optical density range.
Radiant Heat Source: ISO 5659-2 conical radiant heater, rated at 2.6 kW (230 V), capable of delivering heat flux levels up to 50 kW/m² to the specimen surface.
Automatic Shutter and Pilot Flame: Motorised split shutter automatically opens to expose the specimen to radiation; pilot flame ignition provided for flaming-mode testing.
Heat Flux Meter: Calibrated to measure and set irradiance at the specimen surface in the range 0–100 kW/m².
Specimen Holder: Designed per ISO 5659-2 to hold specimens horizontally, supporting both non-flaming and flaming mode tests.
Air and Fuel Control: Digital display and control for air and propane flow rates, with selectable no-pilot-flame and pilot-flame modes.
Gas Sampling Ports: Provided for optional measurement of toxic gases during testing.
Control & Data Acquisition: Integrated 19″ analysis rack with a 15″ touchscreen PC, running DAQ software for full test control, data logging, and automatic test sequencing.
Advanced Options
FTIR Toxicity test system.
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