In the continuous water level system, a 30 cm eTape™ sensor with a thickness of 0.381 mm and width of 25.4 mm was placed in the inner ring. The sensor had an output range of 400–2000 Ω and resistance gradient of 60 Ω/cm. The sensor resolution was 0.25 mm which resulted an accurate reading of water level changes. However, the readings of the sensor can be affected by temperature changes. A simple voltage divider with a 6800 Ω reference resistor seated on a prototyping breadboard was used to convert the output of the sensor into voltage, see Fig. 5