The brick is mainly comprised of three parts: An Electronic brick connector, a 1 Mohm resistor, and several lines of bare conducting wires.
This sensor works by having a series of exposed traces connected to ground and interlaced between the grounded traces are the sens traces. The sensor traces have a weak pull-up resistor of 1 Mohm. The resistor will pull the sensor trace value high until a drop of water shorts the sensor trace to the grounded trace. Believe it or not this circuit will work with the digital I/O pins of your Arduino or you can use it with the analog pins to detect the amount of water induced contact between the grounded and sensor traces.
Working voltage: 5V
Working Current: <20ma
Width of detection: 40mm x 16mm
Working Temperature: 10C-30C
Size: 65mm x 20mm x 8mm
Arduino compatible interface
Low power consumption
Output voltage signal: 0~4.2V
"S" stand for signal input
"+" stand for power supply
"-" stand for GND
Tank overflow detector
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