100K Electric Kettle NTC Temperature Probe
In an electric kettle with a 100K NTC (Negative Temperature
Coefficient) thermistor as the temperature probe, the "100K" refers
to the nominal resistance of the thermistor at a standard
temperature, often 25 degrees Celsius.
Nominal Resistance: The 100K NTC thermistor has a nominal
resistance of 100,000 ohms (100 kilohms) at a specific reference
temperature, usually 25°C. This value is crucial for calibration
and temperature measurement.
Placement: The NTC temperature probe is positioned inside the
electric kettle, typically in contact with the water. It may be
integrated into the heating element or placed in close proximity to
where the water is being heated.
Temperature Sensing: As the water temperature changes, the
resistance of the 100K NTC thermistor also changes according to its
negative temperature coefficient. The thermistor's resistance
decreases as the temperature increases.
Wiring and Circuitry: The NTC thermistor is connected to the
kettle's control circuitry, forming part of a voltage divider
circuit. The change in resistance of the thermistor affects the
voltage across the circuit, and this voltage variation is measured
by the control system.
Control System: The electric kettle's control system uses the
temperature information gathered from the NTC thermistor to
regulate the heating element. It can adjust the heating power or
turn off the heating element when the water reaches the desired
temperature.
Boil-Dry Protection: The NTC temperature probe is instrumental in
boil-dry protection. By monitoring the temperature and detecting a
lack of water, the control system can initiate safety measures,
such as automatically turning off the heating element to prevent
damage or hazards.
Calibration: Calibration ensures the accuracy of temperature
readings. Manufacturers calibrate the NTC thermistor by comparing
its resistance-temperature characteristics to known standards. This
calibration allows the electric kettle to provide precise
temperature control.
Safety Features: The NTC temperature probe contributes to the
overall safety of the electric kettle. Beyond boil-dry protection,
it helps prevent overheating and ensures that the kettle operates
within safe temperature limits.
Application:
Temperature measurement of electric kettle.
