Toxicity Index Tester
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The GB/T 19666 Toxicity Index Tester is used for smoke toxicity testing in accordance with multiple international and regional standards. Typical application scenarios include:
Flame-retardant and fire-resistant power cables
Railway rolling stock cables and signal cables
Optical fiber cables and communication cables
Polymer insulation and sheath materials
Halogen-containing and halogen-free cable compounds
The instrument supports both absorption-liquid analysis and gas bag collection methods, allowing flexible downstream analysis depending on the test standard and laboratory requirements.
Standards
The system complies with the following standards and test methods:
(1) GB/T 19666 – General Rules for Flame-Retardant and Fire-Resistant Wires, Cables or Optical Cables
(2) EN 50305 – Railway Applications – Test Methods for Fire Behaviour of Electric Cables
(3) BS 6853 Annex B – Code of Practice for Fire Precautions in the Design and Construction of Passenger Carrying Trains
(4) ISO 19700 – Controlled Equivalence Ratio Method for the Determination of Toxic Product Yields in Fire Effluents (Steady-State Tube Furnace Method)
Parameters
| Item | Specification |
|---|---|
| Tube furnace heating length | 600 mm |
| Temperature range | 0–1100 °C |
| Temperature accuracy | ±0.1 °C |
| Quartz tube | Heat-resistant quartz, thickness ≥ 2 mm |
| SO₂ measurement range | 0–1000 ppm |
| SO₂ resolution | 1 ppm |
| SO₂ accuracy | ±30 ppm |
| NOₓ measurement range | 0–3000 ppm |
| NOₓ resolution | 1 ppm |
| NOₓ accuracy | ±30 ppm |
| Gas sampling bag | PTFE-coated, 80 L capacity, with imported manual sampler |
| CO measurement range | 0–10 % |
| CO resolution | 0.01 % |
| CO accuracy | Absolute ±0.1 % or relative ±3 % |
| CO₂ measurement range | 0–20 % |
| CO₂ resolution | 0.01 % |
| CO₂ accuracy | Absolute ±0.2 % or relative ±3 % |
| Spectral analysis device | Spectrometer at 500 nm wavelength, membrane thickness 10 mm |
| Absorption solution | 0.1 N NaOH |
| Titration reagents | Picric acid aqueous solution (3 g/dm³) and sodium carbonate aqueous solution (50 g/dm³) |
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