| 摘要 |
A liquid level detection device includes a sensor provided in a container which stores a liquid therein and having a variable resistance which changes a resistance value in association with a change of liquid level to output a voltage signal according to the resistance value of the variable resistance when a voltage is applied thereto, and a power supply circuit applying the voltage to the sensor intermittently on a predetermined cycle. A conducting time during which the power supply circuit applies the voltage to the sensor is equal to or less than 40 ms per cycle.
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