ATSFAAR UL94 Combustion Test Chamber Code 1005705

Overview

The ATSFAAR UL94 Combustion Test Chamber (Model Code 1005705) is a benchtop, self-contained testing system engineered for precise execution of flammability classification tests in accordance with Underwriters Laboratories Standard UL 94. It implements the fundamental principles of vertical/horizontal burning rate assessment under controlled ignition conditions, utilizing calibrated methane flame sources and standardized specimen orientation to quantify material response—including afterflame time, afterglow time, dripping behavior, and flame propagation resistance. The chamber operates as a fully integrated safety enclosure—functioning simultaneously as both test apparatus and ventilated containment unit—eliminating the need for external fume hoods while maintaining operator protection and environmental compliance during repetitive thermal exposure cycles.

Key Features

• Stainless steel monocoque construction ensures long-term corrosion resistance, dimensional stability, and fire-rated structural integrity across repeated thermal cycling.
• Front-access dual glove ports allow safe manual manipulation of specimens and test tools without compromising chamber integrity or airflow dynamics.
• Tempered glass observation panels open outward for routine inspection, cleaning, and calibration access—maintaining optical clarity and mechanical safety per EN 12600 impact class standards.
• Dedicated methane gas delivery panel includes a calibrated rotameter, fine-adjustment needle valve, and bourdon-tube pressure gauge—enabling reproducible 20 mm and 125 mm flame height verification per ASTM D 5207.
• Integrated fume aspiration system features variable-speed extraction, activated via foot pedal at test termination—ensuring rapid removal of combustion byproducts while preserving laminar airflow during active flaming phases.
• Bench-mounted modular architecture supports seamless integration into ISO/IEC 17025-accredited laboratories, with footprint optimized for Class II biosafety cabinet-compatible lab layouts.

Sample Compatibility & Compliance

The chamber accommodates rigid and semi-rigid polymeric specimens up to 130 mm × 13 mm × 12.7 mm (V-test) or 125 mm × 13 mm × 12.7 mm (HB-test), conforming to UL 94 specimen preparation tolerances. It supports evaluation of thermoplastics, thermosets, foams, laminates, and coated substrates—provided they meet minimum thickness and surface flatness requirements defined in UL 94 Section 5. All operational parameters—including flame impingement geometry, specimen mounting angle, and post-ignition timing resolution—are traceable to NIST-traceable reference standards. The system meets essential requirements for GLP-compliant testing environments and facilitates audit-ready documentation when paired with optional digital thermocouple logging (Type K, ±0.5 °C accuracy) or analog chart recorder outputs.

Software & Data Management

While the base configuration operates as a manually controlled physical test platform, optional digital instrumentation modules provide time-stamped event logging—including ignition timestamp, first flame extinction, last afterglow cessation, and drip ignition confirmation. Data output conforms to CSV format for import into LIMS platforms or statistical process control (SPC) software. When deployed in regulated environments, the optional digital thermometer module supports 21 CFR Part 11–compliant electronic signatures, audit trails, and user-level access controls—ensuring full traceability from test initiation through final classification assignment (e.g., V-0 pass/fail determination).

Applications

This chamber serves critical roles in polymer formulation development, quality assurance of electrical insulation components, automotive interior material certification (per FMVSS 302 and ISO 3795), aerospace cabin interior compliance (FAR 25.853), and electronics enclosure validation. It is routinely employed by third-party testing laboratories accredited to ISO/IEC 17025, contract manufacturers supporting OEM PPAP submissions, and R&D teams conducting comparative flame-retardant additive screening. Its design enables direct correlation between UL 94 classification outcomes and underlying material properties—including limiting oxygen index (LOI), heat release rate (HRR), and char yield—when used in conjunction with complementary cone calorimetry data.

FAQ

Does this chamber support all UL 94 test methods listed in the standard?
Yes—it is configured for HB, V-0, V-1, V-2, 5VA, 5VB, VTM-1, and VTM-2 procedures, including specimen mounting fixtures and flame positioning jigs specific to each method.
Is methane the only approved fuel gas?
UL 94 specifies high-purity methane (≥98% CH₄) as the sole ignition source; propane or butane are not permitted per Clause 7.2.1 of the current UL 94 edition.
Can the chamber be connected to a central exhaust system?
Yes—the rear-mounted 100 mm diameter duct port complies with EN 14175-3 specifications and interfaces directly with laboratory HVAC manifolds operating at −150 Pa static pressure.
What calibration documentation is provided with the system?
Each unit ships with factory calibration certificates for flame height verification (20 mm / 125 mm), gas pressure transducer (0–100 kPa), and thermocouple inputs (NIST-traceable), valid for 12 months from date of shipment.
Is operator training included with purchase?
ATSFAAR provides on-site or virtual commissioning support, including hands-on procedural walkthroughs aligned with UL 94 Annex A guidance and internal laboratory SOP development assistance.