The Steiner Tunnel Chamber is a precision-engineered testing apparatus designed for evaluating the surface burning characteristics of building materials and cables according to ASTM E84 and UL 910 standards. This advanced system provides comprehensive fire safety assessment for construction materials and plenum-rated cables.

• ASTM E84: Surface burning characteristics of building materials
• UL 910: Plenum cable fire safety standard (Steiner Tunnel Test)
• UL 723, NFPA 255, UBC 8-1: Equivalent building material standards
• CAN/ULC S102: Canadian building material evaluation

• Flooring materials: wood flooring, carpets
• Ceiling and wall finishes: panels, wallpapers
• Insulation materials: pipe and wall insulation
• Plywood and upholstered furniture components
• CMP plenum cables for air handling systems
• Paints, coatings, adhesives, and sealants

• Stainless steel combustion box with refractory brick lining
• Internal dimensions: 305mm × 451mm × 7.6m
• Double-layer quartz glass observation windows
• Water tank sealing design for box cover
• Cooling water circulation support bracket

• 10kV spark igniter with safety stop-fire device
• Automatic gas flow control system (1% accuracy)
• 3KW variable frequency fan for flue wind speed control
• Precision gas pressure and flow control valves

• Smoke density analysis with incandescent light system
• K-type armored thermocouple (0.5°C accuracy)
• Pressure sensor range: 0-100Pa (±2Pa accuracy)
• Computer animation for real-time flame spread monitoring