Fire testing for plastics, cables, and electronics: Discover the new NETZSCH UL 94 Classic – the manual UL 94 flammability tester for precise, standard-compliant results.
Fire Testing

UL 94 Classic

Fire Testing System

Highlights
Method
Specifications
Contact
Media

Highlights

Test Device for Flammability of Plastics for Parts in Devices and Appliances – Basic Version of the UL 94

UL 94 is one of the most widely recognized flammability standards for plastics. It defines methods to classify materials based on how they burn in different orientations and under different conditions. NETZSCH offers dedicated UL94 flammability test instruments designed to perform the full range of UL 94 classifications under controlled and repeatable conditions:

  • ASTM Standards: ASTM D635, D3801, D4804, D5048, D4986, ASTM D5025, ASTM D5207
  • European Standards: EN 60695 Part 11-10, EN 60695 Part 11-20, EN 60695 Part 11- 3, EN 60695 Part 11-4, IEC EN 60707
  • ISO Global Standards: ISO 1210, ISO 9772, ISO 9773, ISO 10093, ISO 10315


The UL 94 Classic is a basic version of the UL 94 device, with simpler manual operation and fewer electronic features. It offers reliable performance at a more affordable price. Both models perform the same flammability tests according to identical standards.

The UL 94 Classic combines proven testing principles with straightforward manual handling — ideal for laboratories that value simplicity, precision, and repeatability.

Method

  • Closed combustion chamber with exhaust fan
  • Material: Stainless steel, bead-blasted finish
  • Large viewing window with glass in the front door
  • Adjustable burner with inclination angles of 0°, 20°, and 45°
  • Manual positioning:
    • Burner positioning along the X-axis
    • Specimen positioning along the Y-axis for horizontal and vertical tests
  • Manual flame calibration in accordance with ASTM D5025
  • Specimen holders for HB, V, 5V, HF, and calibration tests
  • Manual controls for gas flow, pressure, and flame height using valves and gauges
  • Mechanical timer or external stopwatch for time measurement
  • Thermocouples with 10 g (500 W) and 1.76 g (50 W) copper blocks available (DAkkS calibration optional)
NETZSCH fire testing apparatusUL 94 Classic with a clear front, featuring internal components for precise analysis in material testing.

Specifications

Measurement methodDevice for assessing the flammability of plastic materials used in parts of devices and appliances
according to UL 94 (5th and 6th Edition), DIN EN 60695 Parts 11-3, 11-4, 11-10, 11-20, ISO 9772, and ISO 9773
Sample holderSample holder for horizontal and verticals tests with sample support, thermocouple holder and wire grid
Burner
  • Vertical, with adjustable tilt angle (20° and 45º) to the vertical axis with valve for fine adjustment of the flame
  • Burner power selectable 50 W/500 W
OperationFully manual operation for precise and reproducible testing under laboratory conditions
Accessories
  • Calibration gauges in accordance with DIN EN 60695 Parts 11-3, 11-4, 11-5, 11-10, 11-20
  • Optional: Base frame and aluminum exhaust duct with draft interrupter

What is the difference between the NETZSCH UL 94 Supreme and UL 94 Classic flammability testing devices?

Both the NETZSCH UL 94 Supreme and UL 94 Classic test instruments are designed for the assessment of the flammability of plastic materials used in parts of devices and appliances.

They comply with the same international standards – including ASTM D635, D3801, D4804, D5025, EN 60695 (Parts 11-3, 11-4, 11-10, 11-20) and ISO 9772 / 9773 – ensuring identical test results and classifications according to UL 94.

The main difference lies in the degree of automation, handling, and operator comfort. The UL 94 Supreme offers semi-automatic operation and digital control for higher throughput and reproducibility, while the UL 94 Classic presents a manual, cost-efficient alternative with the same test precision and reliability — perfectly suited for laboratories that value simplicity and full control over every test step.

Summary of key differences

FeatureUL 94 SupremeUL 94 Classic
OperationSemi-automatic with electric spindle systemManual adjustment
ControlTouch display with UL 94 softwareManual front-panel controls
CalibrationProcessor-controlledManual flame calibration
Chamber interiorBlack insulated walls for enhanced visibilityBlack walls for enhanced visibility
Positioning axesElectric Y/Z axes I manual XManual X/Y/Z axes
Timer / Flow controlProcessor-controlledManual stopwatch / mechanical gauges
Best suited forHigh-throughput, automated laboratoriesEducational, QC, or manual operation environments

Of course, both systems deliver accurate, standard-compliant UL 94 flammability results.

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Consultancy & Sales

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Service & Support

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Proven Excellence in Service

At NETZSCH Analyzing & Testing, we offer a comprehensive range of services globally to ensure the optimal performance and longevity of your thermoanalytical equipment. With a track record of proven excellence, our services are designed to maximize the effectiveness of your devices, extend their lifespan, and minimize downtime. 

Unlock the full potential of your equipment with our tailored solutions, backed by years of industry expertise and innovation.

Downloads and Media

Brochure and Datasheet

Videos

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

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In this presentation, Stephan Strickmann introduces UL 94 Classic , a robust and budget-friendly solution for standardized fire testing of plastics. The system delivers fully compliant UL 94 results while focusing on essential functionality and a clean, efficient workflow. The talk covers how UL 94 Classic helps manufacturers evaluate self-extinguishing behavior, burn time, and flaming droplets, supporting safety certification across electronics, appliances, automotive, and industrial applications—without unnecessary complexity or cost.

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