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75 °C Thermal Stability / Self-Heating Substance Tester
This instrument integrates 75 °C thermal stability testing and self-heating substance testing. The 75 °C thermal stability test monitors the temperature difference between the test sample and an inert reference at a constant 75 °C for 48 consecutive hours to determine whether the substance is classified as “too dangerous to transport.” The self-heating substance test places the sample in standard 25 mm or 100 mm cubic wire-mesh baskets and continuously monitors for hazardous self-heating at 100 °C, 120 °C, or 140 °C to determine the packaging group.
Test Parameters
Sample-Reference Temperature Difference, Self-Heating Determination, Temperature Rise, Oxidative Self-Heating Tendency
Application
Chemicals, Civil Explosives, Inspection & Testing, Environmental Protection
Features
Specifications
Standards
Applications
Videos
Features
Integrated dual-function design: self-heating substance test and 75 °C thermal stability test in one instrument.
Embedded processor, Windows CE operating system.
8-inch LCD touchscreen displaying real-time test status.
Built-in hot air circulation heating system ensuring temperature uniformity and stability.
Digital PID control algorithm for precise heating temperature control with high accuracy.
Test reports include packaging type assessment.
Built-in fault detection with audible and visual alarms for enhanced safety.
Versatile test options allowing users to configure test parameters based on sample characteristics and adjust test sequence arbitrarily.
Custom wire-mesh baskets available in special specifications.
Three-point temperature measurement system ensuring data accuracy and reliability.
Specially designed tube cover pressure relief device for effective internal pressure release.
Fully unattended automated operation.
Real-time display of runtime and temperature with automatic test curve plotting; raw data review available.
Blast-resistant glass observation window on the front; rear pressure relief door designed to open when internal force exceeds 2.5 kgf, ensuring safety.
Fully automated test process requiring no manual intervention; supports parameter setting, data storage, and report viewing.
Test Standards: UN Recommendations on the Transport of Dangerous Goods – Manual of Tests and Criteria; GB/T 21612; GAT 536; NY/T 1860; EN 13631-2:2002; GB 5085.5
Specifications
| Operating Environment | -5–45 °C, < 95% RH |
| Temperature Control Range | RT–200 °C |
| Temperature Control Accuracy | ±1 °C |
| Temperature Fluctuation | ≤±0.5 °C |
| Temperature Uniformity in Test Zone | Below 140 °C: ±1.0 °C, 140–180 °C: ±1.5 °C, 180–200 °C: ±2.0 °C |
| Thermocouple Measurement Range | -40–1000 °C |
| Temperature Measurement Resolution | 0.1 °C |
| Temperature Measurement Precision | ±1.5 °C or ≤±0.004|t| |
| Response Time | 0.5 s |
| Temperature Measurement Accuracy | Below 300 °C: ±2.5 °C, Above 300 °C: ±0.75% of reading |
| Standard Timing Range | 0–240 h |
| User-defined Timing Range | 0–480 h |
| Timing Accuracy | ±0.01 s |
| Timing Display Resolution | 1 s |
| Oven Capacity | ≥27 L |
| Self-Heating Test Wire-Mesh Baskets | 25 mm and 100 mm side-length cubes |
| 75 °C Test Container Dimensions (Φ × H) | (50.5 ± 0.5) mm × 150 mm |
| Internal Chamber Dimensions | 350 mm × 350 mm × 400 mm |
| Safety Valve Opening Pressure | 60 kPa |
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Q&A
Why are the self-heating test and the 75 °C thermal stability test combined in one instrument?
Combining both tests allows laboratories to evaluate oxidative self-heating behavior and thermal stability using a single platform, improving workflow efficiency and ensuring consistency when comparing results from different test methods.
How does this instrument support transport safety evaluation?
Test results help determine whether a material exhibits hazardous self-heating or thermal instability under defined conditions, supporting internal hazard assessment and transport safety classification when conducted according to applicable standards.
Is the system suitable for long-duration tests without operator supervision?
Yes. The instrument is designed for continuous, unattended operation, which is particularly important for long-hold self-heating and thermal stability tests.
Can different packaging or containment concepts be evaluated during testing?
Yes. Test reports can reflect packaging-related behavior, helping users assess how containment form may influence thermal response during storage or transport scenarios.
How does the system improve the reliability of test results across multiple runs?
Automated operation, multi-point temperature monitoring, and controlled heating conditions help reduce operator variability and improve repeatability between tests.
