How should automatic water filling be evaluated when buying a lifting noodle cooker?

When evaluating automatic water filling on a lifting noodle boiler, watch what happens below the panel icon: the real level at which the probe trips, the refill flow rate in litres per minute, and how many degrees the cooking tank drops while the valve is open. Drain the tank to simulate a low level and check that the pump starts promptly and stops cleanly at the set point; then pull or short the sensor to confirm the unit alarms and cuts heating instead of running dry. For all-day operations, log refill frequency and temperature loss during lunch and dinner peaks to see whether makeup water keeps pace with noodle output.