LIQUID LEVEL DETECTION CIRCUIT LIQUID LEVEL METER CONTAINER PROVIDED WITH LIQUID LEVEL METER AND VAPORIZER USING CONTAINER

摘要

The level gauge 30 according to the present invention includes a first temperature-measuring resistor R11, a first temperature-measuring resistor R12 disposed in the vicinity of the first temperature-resistance resistor, and a temperature- A temperature detector 37 for detecting the temperature of the first temperature-measuring resistor and the temperature of the first temperature-measuring body, and a temperature detector 37 for detecting the temperature of the first temperature-detector resistor 39, A current controller 38 for determining a current value to be applied to the first temperature measuring resistor so that the temperature difference of the first temperature measuring body is a first constant value and a power source 32 for applying the current of the determined current value to the first temperature measuring resistor The liquid level detecting unit uses the current value applied to the first temperature-resisting resistive member to determine whether the first temperature-sensitive resistor is present in the liquid or outside the liquid. As a result, the liquid level can be detected without being affected by the ambient temperature, and the temperature is controlled by the fixed temperature difference, so that the electric power is not applied to the temperature-measuring resistor more than necessary and the life of the device can be prolonged.