75 °C Thermal Stability / Self-Heating Substance Tester
Used to assess oxidative self-heating and thermal stability, this instrument exposes samples in 25 mm or 100 mm cubic steel wire-mesh containers to air at 100 °C, 120 °C, or 140 °C to determine whether they may be too hazardous for transport. It also detects self-heating at 75 °C over 48 hours by measuring the temperature difference between the test sample and an inert reference, making it suitable for explosive substances, desensitized explosives, self-reactive substances, and organic peroxides.
Test Parameters
Self-heating (self-exothermic behavior)
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Features
Integrates both the “Self-Heating Substance Test” and the “75 °C Thermal Stability Test” in one system
Embedded processor with Windows CE operating system
8-inch LCD touchscreen for real-time display of test status
Built-in hot-air circulation heating system to ensure uniform and stable temperature distribution
Precise digital PID temperature control with high control accuracy
Test reports include packaging type evaluation
Instrument fault detection with audible and visual alarms for safer testing
Flexible test selection; users can configure parameters based on sample characteristics and adjust the test sequence as needed
Wire-mesh cages available in special specifications (customizable)
Three-point temperature measurement system to ensure accurate and reliable data
Special pressure-relief tube cap to effectively release internal pressure
Fully unattended testing with fully automated, integrated operation
Real-time display of run time and temperature; automatic test curve plotting with access to raw data
Front explosion-proof glass observation window and rear pressure-relief door; internal thrust > 2.5 kgf to ensure safer pressure release
Fully automated test process with no manual intervention required; supports parameter setup, data storage, and report review
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
| Working Environment | (−5 to 45) °C, <95% RH |
| Temperature Control Range | Ambient to 200 °C |
| Temperature Control Accuracy | ±1 °C, fluctuation ≤0.5 °C |
| Temperature Uniformity in Test Zone | ≤140 °C: ±1.0 °C 140–180 °C: ±1.5 °C 180–200 °C: ±2.0 °C |
| Thermocouple Temperature Measurement Range | −40 to 1000 °C |
| Temperature Measurement Resolution | 0.1 °C |
| Temperature Measurement Accuracy | ±1.5 °C or ≤±0.004 |
| Temperature Measurement Trueness | ≤300 °C: ±2.5 °C 300 °C: ±(0.75% of reading) |
| Standard Timing Range | 0 to 240 h |
| Extended Timing Range | 0 to 480 h |
| Timing Accuracy | ±0.01 s |
| Timing Display Resolution | 1 s |
| Oven Chamber Volume | ≥27 L |
| Self-Heating Substance Test Cage Size | 25 mm and 100 mm cube |
| 75 °C Thermal Stability Test Container (Ø × H) | (50.5 ± 0.5) mm × 150 mm |
| Inner Chamber Dimensions (L × W × H) | 350 mm × 350 mm × 400 mm |
| Safety Valve Opening Pressure | 60 kPa |
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