Product Description
STANDARD FEATURES
| Burning Chamber Capacity | 0.75m with glass observation door |
| Burning Angle | 20 , 45 , 90 (ie 0 ) adjustable |
| Flame Time | 0 ~ 99 minutes 99 seconds can be set |
| After Flame Time | 0 ~ 99 minutes 99 seconds can be set |
| After Glow Time | 0 ~ 99 minutes 99 seconds can be set |
| Burner Dimensions | The inner diameter of the nozzle is 9.50.3mm, the effective length of the nozzle is 10010mm, and there is an air adjustment hole |
| Combustion Gas | LPG gas (Customize) |
| Flame Height | Adjustable from 20mm to 175mm as standard |
| Features | It is also equipped with lighting device, air extraction device, gas flow regulating valve, gas pressure gauge, gas pressure regulating valve, gas flow meter, gas U-shaped pressure gauge and sample fixture |
| Power | AC 220v 50HZ |
UL94 combustion tester is a kind of equipment used to test the combustion performance of materials, especially plastics and wires and cables, etc. It is mainly evaluated according to the UL94 standard, which is formulated by Underwriters Laboratories (UL) for evaluating the self-extinguishing, flame spreading and fire-resistant performance of the materials in a fire environment. UL94 testers are commonly used to test the flame retardancy of plastics, electronics, fiber optics, automotive parts, and wires and cables.
1. UL94 standard introduction
UL94 standard mainly includes the following different combustion levels:
- V-0: The material is capable of extinguishing quickly after the source of ignition is removed, and dripping molten material will not cause a fire.
- V-1: The material is capable of extinguishing quickly after removal of the ignition source and dripping melt will not cause a fire, but can have a lesser burn duration.
- V-2: Similar to V-1, but dripping melt may cause a fire.
- HB: The material is capable of burning in a horizontal position for a certain period of time, but at a slower rate.
- 5VA and 5VB: These two tests are more demanding and are mainly used to evaluate highly flame retardant materials.
2. Equipment function and role
The main function of UL94 combustion tester is to simulate the role of the fire source in the actual use of the environment to test the performance of the material under the influence of flame. The role of the equipment includes:
- Test the self-extinguishing nature of the material: to assess whether the material is able to self-extinguish after removing the source of ignition.
- Evaluating flame spreadability: Tests the rate of flame spread on the surface or within the material.
- Smoke test: To observe whether the material produces a large amount of toxic smoke during combustion.
3. UL94 combustion tester working principle
UL94 combustion tester usually includes the following basic functions:
- Fire source settings: According to different test requirements, the tester can adjust the size of the fire source and application time.
- Sample fixture: the specimen is fixed by a special fixture to ensure that it is in the specified position to accept the role of the fire source.
- Time Control: During the test, the flame burning time is recorded to assess the burning characteristics of the material.
- Extinguishing Function: After removing the source of ignition, observe whether the sample is able to self-extinguish or continue to burn.
- Data Acquisition: Record the flame spreading speed, burning time, molten drop situation and other parameters.
4. UL94 Combustion Tester Test Methods
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Vertical Combustion Test (UL94-V): In this test method, the specimen is placed vertically and the ignition source ignites the bottom end of the material and the combustion process is recorded.
- V-0: After the source of ignition is removed, the material extinguishes within 10 seconds and the molten drop does not start a fire.
- V-1: After removal of the ignition source, the material is extinguished within 30 seconds and the droplets may start a fire.
- V-2: The material is extinguished within 30 seconds after removal of the ignition source and the droplets may cause a fire.
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Horizontal Burning Test (UL94-HB): This test method is used to evaluate the burning rate of a material in a horizontal position and is applicable to larger or irregularly shaped specimens.
5. Equipment Composition
UL94 combustion tester usually consists of the following main parts:
- Specimen holder: Used to hold the specimen in place and ensure its stability.
- Fire source device: common fire source gas burner, the intensity and duration of the flame can be adjusted.
- Control System: Used to set the combustion time, flame height and other test parameters.
- Timer: Used to accurately record burn duration.
- Temperature and smoke monitoring: to detect temperature changes and smoke generation during the test.
- Data Acquisition System: Records experimental data such as burn time, flame spread rate and whether the material is self-extinguishing.
6. Application areas of UL94 combustion tester
- Plastic industry: Plastic products such as home appliance shells, electronic product shells, etc. need to be tested for UL94 to ensure that they meet the flame retardant requirements.
- Wire and cable: wire and cable insulation materials need to be UL94 tested to ensure that it can effectively inhibit the spread of flame in a fire.
- Automotive industry: Automotive interiors, wiring harnesses, control circuit boards, etc. have high flame retardancy requirements, and UL94 combustion testers can be used to test the safety performance of related components.
- Electronic products: Various materials used in electronic equipment, especially the parts in high temperature environment, must have good flame retardancy.
- Building materials: Insulating materials and decorative materials used in the construction industry also need to pass UL94 tests to improve building safety.
Precision in Flame Retardancy TestingEngineered for accuracy, the UL94 Combustion Testing Machine delivers precise flame application and timing. Automatic controls combined with digital LCD display provide real-time data with a resolution of 0.1 seconds, making it highly suitable for reliable fire performance testing in plastic materials.
Enhanced Safety and ObservabilityThe unit prioritizes operator protection through features such as an emergency shutoff, interlock protection, and a fully transparent observation window. Integrated LED illumination enables clear monitoring, while the built-in ventilation fan maintains a safe internal environment during tests.
Flexible and Versatile DesignWith adjustable burner angles and customizable settings for flame application time, gas pressure, and test speed, the machine accommodates various specimen sizes and test protocols. Its bench-top mounting and automatic operation streamline usage in both research and industrial inspection environments.
FAQ's of UL94 combustion testing machine:
Q: How does the dual built-in digital timer function on the UL94 Combustion Testing Machine?
A: The dual timers independently track afterflame and afterglow durations, allowing operators to accurately record the combustion phases for compliance with standardized test methods. Timers can be set between 0 and 999.9 seconds with a high accuracy of 0.1 second.
Q: What types of plastic specimens and test methods does the machine support?
A: The machine is compatible with vertical and horizontal flammability testing of plastic samples sized 125 mm 13 mm variable thickness. It is suitable for single or multiple specimen testing, accommodating up to five samples per test cycle.
Q: When should the adjustable burner angles be used during testing?
A: Adjustable angles of 0, 20, and 45 are selected according to the required test standard for the specimen. Each angle simulates specific real-world conditions to evaluate material performance under differing flame exposures.
Q: Where is the UL94 Combustion Testing Machine most effectively utilized?
A: Best suited for material research laboratories, plastic manufacturing quality control departments, and certification agencies, this machine is designed for bench-top or desktop installation in controlled indoor environments.
Q: What is the testing process using this equipment?
A: Specimens are mounted in a heat-resistant stainless steel holder. The flame application time, test speed, and burner angle are set as per the test protocol, following which the automated system applies the flame and records timing data. Digital readouts provide instantaneous results.
Q: How does the equipment ensure operator safety and result accuracy?
A: Safety features include an emergency shutoff, interlock protection to prevent accidental exposure, and a fully enclosed chamber. Accurate timing is guaranteed by microprocessor-controlled automation and highly sensitive digital LCD displays.
Q: What are the main benefits of using the UL94 Combustion Testing Machine for plastic material testing?
A: The machine offers rapid, reproducible flammability testing with high resolution data output, efficient specimen handling, and automated controls. These features reduce operator error, enhance laboratory throughput, and ensure compliance with international UL94 testing standards.