Plastic materials used in electrical and electronic equipment must resist ignition and limit flame spread. The Horizontal Vertical Flame Chamber provides the controlled environment for UL 94 testing, holding the specimen in either horizontal or vertical orientation while a calibrated burner applies a flame for a precise duration. This Horizontal Vertical Flame Chamber is built for plastics manufacturers, electronics suppliers, and compliance laboratories that need repeatable flammability ratings without building a custom test enclosure.

Technical Specifications

The Horizontal Vertical Flame Chamber is supplied as a single model, GT-MC35F-2, with the chamber, burner assembly, specimen positioning system, and touch screen controller configured as a complete test station.

GT-MC35F-2 Core Configuration

• Model/Part Number: GT-MC35F-2

• Applicable Standards: UL 94, IEC 60695-11-3, IEC 60695-11-4, ISO 9772.3/6722, ASTM D635/3801/4804/4986

• Internal Dimensions (W×D×H): 120 × 60 × 112 cm

• External Dimensions (W×D×H): 120 × 65 × 150 cm

• Internal Volume: 0.8 m³

• Flame Height: 15 to 175 mm (adjustable)

• Gas Flowmeter: 20 to 200 ml/min (adjustable)

• Gas Pressure: 5 to 200 mm (adjustable)

• Flame Angle: 0 to 45 degrees (adjustable)

• Burner Height Adjustment: 50 mm

• Sample Vertical Movement: 450 mm

• Sample Horizontal Movement: 180 mm

• Burn Time: 0 to 99.99 s (adjustable)

• After-flame / After-glow Time: 0.1 to 99.99 s (adjustable)

• Timing Precision: 0.01 s

• Chamber Material: 2mm cold plate, CNC formed, powder coated exterior

• Interior Light: Explosion-proof Osram or Philips 40W halogen lamp

• Exhaust System: Standard 180W exhaust fan

• Viewing Window: 5mm armoured glass, 60 × 40 cm

• Window Design: Electrical counterweight, mute rail, weightless operation

• Transmit Mechanism: Axis linear bearing drive, chrome design

• Clamp Design: Imported anodized aluminum

• Control System: Touch screen control with U-pressure direct-reading differential gauge

Standard Accessories Included

• Horizontal Vertical Flame Chamber main unit

• HB test fixture (ASTM D 635, ISO 1210) — Horizontal Burning Test

• V-0-1-2 test fixture (ASTM D 3801, IEC 60695-11-10) — 50W (20mm) Vertical Burning Test

• Flame height gauge

• Touch screen controller

• Differential pressure gauge

• Methane flow meter

• Operation manual

Items Excluded

• Methane gas supply (user-supplied, minimum 98% purity)

• 5VA/5VB test fixture (optional, for 500W vertical burning test)

• HBF/HF 1-2 test fixture (optional, for horizontal burning of foamed materials)

• VTM-0-1-2 test fixture (optional, for thin material vertical burning test)

• Thermocouple and temperature calibration device (optional)

• Calibration certificate (available upon request)

• Extended warranty (available for purchase)

• On-site installation and commissioning (available as a service)

Pre-installation Requirements

• Stable, level floor with load-bearing capacity for the chamber (net weight approximately 125 kg)

• Dedicated AC 220V, 50Hz power supply

• Methane gas supply with minimum 98% purity and appropriate regulator

• Adequate clearance for the 180W exhaust fan ducting and ventilation

• Fire-resistant laboratory environment with proper exhaust ventilation

• Ambient conditions free from high dust concentration, flammable gas, or strong electromagnetic radiation

• Operator training on open-flame testing safety procedures is recommended

Key Benefits: Repeatable UL 94 Data Without Custom Fixtures

Standards-Matched Test Configuration

The Horizontal Vertical Flame Chamber ships with the HB horizontal burning fixture and the V-0-1-2 vertical burning fixture as standard. The chamber is configured to UL 94, IEC 60695, and ASTM D635/D3801 methods, so you start testing without sourcing or fabricating sample holders separately.

Adjustable Flame Parameters for Different Material Ratings

Flame height adjusts from 15 to 175 mm, gas flow from 20 to 200 ml/min, and flame angle from 0 to 45 degrees. Whether you are running a 50W vertical test for V-0 classification or a horizontal HB test, the burner settings match the method without swapping hardware.

Precise Timing for After-flame and After-glow Measurements

The touch screen controller times burn duration, after-flame, and after-glow to 0.01-second precision. After-flame and after-glow timing each span 0.1 to 99.99 seconds. For UL 94 ratings, where a few tenths of a second can change the classification, this precision matters.

Safe Observation During Open-Flame Testing

The 5mm armoured glass viewing window measures 60 × 40 cm, and the counterweight rail design lets you raise and lower it quietly without disturbing the test. The interior halogen lamp illuminates the specimen, and the 180W exhaust fan routes combustion products out of the chamber.

To explore how this Horizontal Vertical Flame Chamber fits into your material flammability testing workflow, visit our website at Optimum Solution to compare related Horizontal Vertical Flame Chamber. For detailed application notes on UL 94 testing, you can view the GESTER horizontal vertical flame chamber product page on the manufacturer's site. For information on flammability standards, refer to the UL 94 standard or the IEC 60695-11-10 specification.

Solving the Problems That Slow Flammability Testing Down

Struggling to switch between horizontal and vertical test setups?
The chamber includes both HB horizontal and V-0-1-2 vertical fixtures as standard. The sample positioning system moves 450mm vertically and 180mm horizontally, so you can reconfigure for either orientation without removing the chamber from service.

Concerned about flame consistency between operators?
Flame height, gas flow, and pressure are all adjustable and indicated on dedicated gauges. The burner height adjusts 50mm for precise positioning. Each operator sets the same parameters, and the flame behaves the same way.

Tired of imprecise after-flame timing affecting your UL 94 rating?
The touch screen controller times after-flame and after-glow to 0.01-second precision. The readings are displayed directly, so you record the actual duration rather than estimating from a stopwatch.

Need optional test capabilities for foamed or thin materials?
The chamber accepts optional fixtures for 5VA/5VB (500W vertical), HBF/HF 1-2 (foamed materials), and VTM-0-1-2 (thin materials). You can expand the test range without replacing the chamber.

Warranty and Support

We provide a 1-year manufacturer's warranty covering parts and labor. Technical support, installation assistance, and operational training are also available. Replacement parts and consumables are available throughout the product's service life.

Call to Action

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