Septic tanks
AssigneeSamaran International Pty Ltd
InventorsNeil James Dunbar, Matt Goodall Parsons
Life of this patent
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Abstract
A method of determining whether a septic tank containing a liquid and sludge or scum mixture needs to be emptied, comprising locating a sensor in the mixture wherein the sensor is adapted to measure a parameter which can be used to determining the depth of sludge or scum in the septic tank and generating a warning signal when a signal from the sensor is indicative of a depth of sludge or scum exceeding a predetermined limit.
Claims5
A method of determining whether a septic tank containing a water and sludge mixture needs to be emptied, comprising locating a pressure sensor in a region of the tank where sludge is likely to form;
- and generating a warning signal if the pressure of the mixture is measured by the sensor as being in excess of 1.01 times that of a comparable depth of water.
A method of determining whether a septic tank containing a water and sludge mixture needs to be emptied, comprising locating a pressure sensor in a region of the tank where sludge is likely to form;
- and generating a warning signal if the pressure measured by the sensor decreases by at least 1% over a period of time.
A method of determining whether a septic tank containing a scum layer formed on top of sewerage needs to be emptied comprising, locating a pressure sensor in an upper level of the tank to measure the pressure due to the scum layer and generating a warning signal if the pressure of the scum layer corresponds to a pressure at least 1% lower than an equivalent level of water.
Dependencies are inferred from the claim text.