. Safety Valve: When the inner box's pressure higher than the machine's undertake value, it will self-relieve.
3. Double overheat protection device: When inner box's temperature is too high, it will alarm, and Automatic cut off the heating power.
4. Cover protection: The inner box's cover is made of aluminum alloy, can protect the worker from scald.
Features:
1.Automatic adding water function, and automatic filling water upon the water short storage while testing.
2.Automatic operation to test