Water tank water level alarm circuit

Published:2011/5/13 3:50:00 Author:Nicole | Keyword: water level, water tank | From:SeekIC

The insulator is fixed in water tank cap, the insulator should bear 0.717*0.001 kg/m2 pressure. The metal detectorpasses the insulator then it is put into water, and it is covered with high temperature tube. One terminal of the high temperature tube which is close to water tank cap has a little hole, it can make the water rise in the tube, even rise to the probe. When the level is lowed than probe, the collector potential of composite pipe Q2 will rise, then the diode turns on, alarm light M1 is lighting.



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