System and method for indicating liquid level condition
First Claim
1. An indicator for displaying a liquid level condition within a tank, the indicator comprising:
- a sensor for detecting at least one of a first liquid level condition and a second liquid level condition, the first liquid level condition occurring at a predetermined low liquid level within the tank and the second liquid level condition occurring at a liquid level above the first liquid level condition;
a photodetector for detecting at least an ambient dark condition;
a first indicator light for indicating at least one of the first and second liquid level conditions; and
electrical circuitry electrically connected to the sensor, the photodetector and the first indicator light, the electrical circuitry being operable to illuminate the first indicator light upon detection of the ambient dark condition by the photodetector and detection of one of the first and second liquid level conditions by the sensor.
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Abstract
An indicator for displaying either low liquid level or satisfactory liquid level conditions within a tank includes a sensor for detecting the liquid level conditions, a photodetector for detecting an ambient dark condition, a pair of indicator lights for indicating either the low liquid level or satisfactory liquid level conditions, and electrical circuitry operable to illuminate one of the indicator lights upon detection of the ambient dark condition by the photodetector and detection of either the low liquid level condition or satisfactory liquid level condition by the sensor.
13 Citations
26 Claims
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1. An indicator for displaying a liquid level condition within a tank, the indicator comprising:
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a sensor for detecting at least one of a first liquid level condition and a second liquid level condition, the first liquid level condition occurring at a predetermined low liquid level within the tank and the second liquid level condition occurring at a liquid level above the first liquid level condition;
a photodetector for detecting at least an ambient dark condition;
a first indicator light for indicating at least one of the first and second liquid level conditions; and
electrical circuitry electrically connected to the sensor, the photodetector and the first indicator light, the electrical circuitry being operable to illuminate the first indicator light upon detection of the ambient dark condition by the photodetector and detection of one of the first and second liquid level conditions by the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for displaying a liquid level condition within a tank, the method comprising:
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providing at least one indicator light;
detecting at least one of a first liquid level condition and a second liquid level condition, the first liquid level condition occurring at a predetermined low liquid level within the tank and the second liquid level condition occurring at a liquid level above the first liquid level condition;
detecting at least an ambient dark condition; and
illuminating the first indicator light upon detection of the ambient dark condition and detection of one of the first and second liquid level conditions by the sensor. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification