Portable liquid level detector
First Claim
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1. A portable liquid level detector, comprising:
- a portable casing;
a power supply unit disposed in the casing;
a sensor coupled to the power supply unit to sense whether a capacitance within a container is changed and to output a enable signal when the capacitance has changed; and
a signal device coupled to the sensor that outputs a signal after receiving the enable signal.
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Abstract
A portable liquid level detector. The detector comprises a portable casing, a power supply unit disposed in the portable casing, a sensing device coupled to the power supply unit to sense a capacitance within a container and to output a enable signal when a difference in the capacitance is detected, a light emission device coupled to the sensing unit that illuminates after receiving the enable signal, and an alarm device coupled to the sensing unit that sounds after receiving the enable signal.
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Citations
16 Claims
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1. A portable liquid level detector, comprising:
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a portable casing;
a power supply unit disposed in the casing;
a sensor coupled to the power supply unit to sense whether a capacitance within a container is changed and to output a enable signal when the capacitance has changed; and
a signal device coupled to the sensor that outputs a signal after receiving the enable signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A portable liquid level detector, comprise:
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a portable casing;
a battery set deposed in the portable casing;
a capacitive proximity switch coupled to the battery set to sense whether a capacitance within a container is changed and to output a enable signal when the capacitance has changed;
a light emission diode coupled to the capacitive proximity switch that illuminates after receiving the enable signal;
a buzzer coupled to the capacitive proximity switch that sounds after receiving the enable signal;
a resistor coupled to the light emission diode to limit a current flowing through the light emission diode; and
a switch coupled to the battery set to control a electrical conduction between the battery set and the capacitive proximity switch.
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11. A method of detecting liquid level in a container, comprising:
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moving a capacitive proximity switch into proximity of a container contains a liquid; and
moving the capacitive proximity switch upward and downward relative to the container until a difference in capacitance is detected. - View Dependent Claims (12, 13)
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14. A method of detecting a clog jammed in a pipe, comprising:
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moving a capacitive proximity switch into proximity of a pipe with a clog; and
moving the capacitive proximity switch upward and downward relative to the pipe until a difference in capacitance is detected. - View Dependent Claims (15, 16)
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Specification