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Dongguan Hallsen Technology Co., Ltd
The application principle of Hall elements in water level sensing in humidifiers: When the water level drops to a certain level, the Hall element senses the change in water level. This information is transmitted to the system, and the system controls the water pump of the humidifier through data analysis to ensure that the water tank is replenished in time to maintain the normal operation of the humidifier.
Recommended model: HS271 omnipolar high-sensitivity micro-power Hall switch
HS271 is an omnipolar Hall effect sensor based on mixed-signal CMOS technology. This IC uses advanced chopper stabilization technology to provide accurate and stable magnetic switch points.
In terms of circuit design, HS271 provides an embedded controlled clock mechanism to provide a clock source for the Hall device and analog signal processing circuit. At the same time, this controlled clock mechanism can send a control signal to make the circuit with high current consumption enter the "sleep" mode periodically; through this mechanism, the chip is periodically "woken up" and detects the strength of the magnetic field passing through the Hall device according to the predetermined magnetic field strength threshold. If the magnetic flux density is higher than the "operating point" threshold or lower than the "release point" threshold, the open-drain output transistor is driven and latched into the corresponding state. During the "sleep" cycle, the output transistor is locked in the previous state. In battery-powered applications, this design provides the best support for extending the working life.
The output transistor of HS271 will be locked in the open (BOP) state when there is a certain strong south pole or north pole magnetic field on the side facing the package marking, and locked in the off (BRP) state when there is no magnetic field.
