The first is by induction steam trip, the accuracy of this way mainly depends on the metal plate steam induction (steam temperature chip), the thermostat thermostat relative to domestic imports less, mainly in the quality and precision of temperature induction, but does not affect the basic boil
Second direct temperature induction control, usually reaches a value of the delay in seconds trip through temperature sensing probe to detect temperature, to ensure the water has been boiling.
Third is indirect temperature sensing control, this word is to control the trip by a temperature controller arranged somewhere indirect induction
No matter what kind of thermostat is good, if it is a formal manufacturers kettle, will be tested, including 3C verified these are basic to the test. But it should be noted that, no matter what the thermostat is good, the standard is to burn to 98℃!