1. Ambient temperature: 15℃～25℃. 

2. Relative humidity: ≤85%. 

3. Power supply voltage and power: 220V 50HZ 100W 

4. Gas source: purity of not less than 95% of the commercial propane, ordinary test can also be used instead of liquefied petroleum gas (Note: gas source and link head user-provided) 

5. Bunsen burner to the type of flame time 15s microcontroller control, digital display 

6. burner aperture of Φ0.17mm, Bunsen burner flame length of 20mm ± 1mm, the burner can be tilted 45 ° on the specimen to apply the flame (1s-99 s) ± 0.5s, can be adjusted arbitrarily, accuracy of ± 0.2s 

7. Gas source: propane with purity above 95%. (Note: the gas source and link head users to provide their own) 

8. shape and packaging size: 102 * 52 * 91