수위 레벨 측정 센서입니다.

안내. 공급되는 제품의 핀수는 제조사 사정에 따라 3개 또는 4개입니다.  하지만 실제로는 2개의 핀만 사용됩니다.  4핀 제품의 경우 가운데 2개의 핀을 사용하시면되며 3핀인 경우 가운데 핀은 미사용됩니다.  저항을 측정해보시면 1k옴 전후의 값이 측정되며 수위 센서지만 손으로 살짝 눌러봐도 누른위치에 따라 저항이 변화되는것을 보실 수 있습니다.

사용법 안내 동영상:  http://www.youtube.com/watch?v=Lu_9eiPu_pA

Description: The eTape Liquid Level Sensor from Milone Technologies is a great way to measure the level of a liquid. It has a resistive output that varies with the level of the fluid. It does away with clunky mechanical floats, and easily interfaces with electronic control systems. The sensor's envelope is compressed by the hydrostatic pressure of the fluid in which it is immersed. This results in a change in resistance that corresponds to the distance from the top of the sensor to the surface of the fluid. The sensor's resistive output is inversely proportional to the height of the liquid: the lower the liquid level, the higher the output resistance; the higher the liquid level, the lower the output resistance.

Note: These sensors used to have only three pins but they're made with four now. The sensor works the same way as before. See the datasheet for details.

Documents:

• Datasheet