Reliable Flammability Testing with NETZSCH UL 94

Why Flammability Testing Matters

In industries such as electronics, cables, and polymer materials, understanding how a material behaves when exposed to flame is critical for ensuring safety, compliance, and product reliability.

Flammability testing in accordance with UL 94 is one of the most widely used international standards for evaluating the burning behavior of plastics. It provides essential data for product development, certification, and risk assessment, ensuring that components meet global safety and quality standards.

With the launch of the UL 94 Classic, NETZSCH introduces a manual, standard-compliant solution for simple, precise and reproducible flammability testing — ideal for applications in the cable, polymer, and electronics sectors. It offers reliable performance at an accessible price.

Burning smartphone on a wooden surface, emphasizing fire hazards in electronic devices and the importance of fire testing. — Understanding how a material behaves when exposed to flame is critical for ensuring safety, compliance, and product reliability.

Proven UL 94 Testing Technology

With the UL 94 Classic, NETZSCH expands its portfolio of flammability testing equipment with a robust, manually operated base version. The new model is designed for laboratories that require reliable, standard-compliant testing of plastics without the need for semi-automatic or electronic control systems.

Like the semi-automatic UL 94 Supreme , the UL 94 Classic complies with major international standards, including ASTM D635, D3801, D4804, D5025, EN 60695 Parts 11-3, 11-4, 11-10, 11-20, and ISO 9772 / 9773.

Both instruments allow UL 94 classification according to global flammability testing criteria.

Simple, Precise, Reliable – The UL 94 Classic at a Glance

The UL 94 Classic has been developed to deliver accurate and repeatable results with minimal operator effort. Its fully manual operation gives the user complete control over every step of the testing process.

Technical Highlights:

Closed combustion chamber with exhaust fan
Stainless-steel housing, bead-blasted, with a large viewing window
Adjustable burner with inclination angles of 0°, 20°, and 45°
Manual positioning of the burner (X-axis) and specimen (Y-axis)
Flame calibration in accordance with ASTM D5025
Specimen holders for HB, V, 5V, HF, and calibration tests
Manual control of gas flow, pressure, and flame height
Thermocouples with 10 g and 1.76 g copper blocks (optional DAkkS calibration)

This makes the UL 94 Classic a fully standard-compliant flammability testing solution, combining proven test principles with the durability and reliability NETZSCH is renowned for.

Fire Testing with the UL 94 Classic – Fully Compliant, Cost-Effective, and Reliable

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In this 5 minute video, Stephan Strickmann introduces the UL 94 Classic , a robust and budget-friendly solution for standardized fire testing of plastics.

UL 94 Supreme and UL 94 Classic : Two Ways to Meet One Standard

Both systems share the same test principle and standards. The difference lies in the operation concept and level of automation:

Feature	UL 94 `Supreme`	UL 94 `Classic`
Operation	Semi-automatic with electric spindle system	Fully manual
Control	Touch display with software interface	Mechanical control via front panel
Calibration	Processor-controlled	Manual calibration
Chamber interior	Black insulated walls for improved visibility	Black walls for improved visibility
Axis movement	Electric Y/Z axes I manual X	Manual X/Y/Z axes
Timing / Flow control	Processor-controlled	Manual or external
Best suited for	R&D and high-throughput labs	Training, QC, and routine testing

NETZSCH UL 94 Supreme flammability tester for reliable testing of plastics and cables in compliance with international standards. — The NETZSCH UL 94 `Supreme`

NETZSCH UL 94 Classic flammability tester for precise manual fire testing of plastics and cables, ensuring safety compliance. — The NETZSCH UL 94 `Classic`

Who Is the UL 94 Classic Designed For?

The new UL 94 Classic is ideal for:

Training and educational labs teaching flammability testing principles
Quality assurance and incoming goods inspection where reliability and ease of use are key
Facilities with moderate testing frequency seeking a cost-effective, robust solution

Thanks to its manual handling and mechanical precision, the NETZSCH UL 94 Classic offers flexibility, low maintenance, and long-term reliability.

Precision, Simplicity, and NETZSCH Quality

With the UL 94 Classic , NETZSCH introduces a technically refined manual alternative to its semi-automatic fire testing device, UL 94 Supreme . While both models meet the same standards, they differ in terms of operation and convenience.

Learn more:

UL 94 Classic
Test Device for Flammability of Plastics for Parts in Devices and Appliances in accordance with UL 94, 5th and 6th Edition, EN 60695 Part 11-10, EN 60695 Part 11-20, EN 60695 Part 11- 3, EN 60695 Part 11-4, ISO 9772, ISO 9773 and many more EN, ASTM and ISO standards
Basic version of the UL 94 device, with simpler manual operation and fewer electronic features
UL 94 Supreme
Test Device for Flammability of Plastics for Parts in Devices and Appliances in accordance with UL 94, 5th and 6th Edition, EN 60695 Part 11-10, EN 60695 Part 11-20, EN 60695 Part 11- 3, EN 60695 Part 11-4, ISO 9772, ISO 9773 and many more EN, ASTM and ISO standards

Are you interested in fire testing devices for a special industry or application?

Feel free to take a look at our entire range of fire testing systems.