Project title the machine model, the full study report warning about the design and verify the performance of the machine using the full warning model used with pond matted together. The design has to consider the work of the pond to filter and cause of occurrence of septic tank is full. Using the plastic tank.A cylindrical tank, matted together Alarm system used in dotwit so that the float model, full septic work warning machine. The function of the circuit are used electrical 12 volt sizes in a circuit switch ON-OFF on-off is used in electrical equipment coming into the series. Alarm system, there will be a switch press release mounted level works with float and Relay determines the behavior of the model, which determines the electric buzz to enter to make the alarm louder. To test the performance of the model. It is found that the average water level makes the audio louder warning is 0.76 ± cm power 22.06 and used in dotwit average is 0.006 ± 0.0007 Newton. Keywords, relays, switches to filter pond.
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