How can I measure the depth of a water tank with apotentiometer? Tank is 8m deep!
2007-02-06 01:59:41 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Put a float on top of the water, attach a string to the float and use the string to move the slider of the potentiometer as the water level rises and falls. Measure the output voltage from the potentiometer using a voltmeter. Calibrate the scale of the voltmeter to show depth in metres.
2007-02-06 02:21:02 · answer #1 · answered by lunchtime_browser 7 · 0⤊ 0⤋
You will need more than just a potentiometer. You would need to run an electric current thru the water and thru the potentiometer and then to a guage that registers the voltage drop. Knowing the exact resistance of the water at full depth - 8 m (what the guage should show at a specific current) and then reading the guage you compare the reading with what it would be with your potentiometer at the lowest setting. As you increase the resistance by turning up the potentiometer, the guage will show less voltage and by measuring that difference you will be able to tell the depth of the water. However, you don't really need the potentiometer as you will get different readings at different depths showing on the guage anyway.
2007-02-06 10:11:35 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Water has weight and you can measure the depth of water with a pressure gauge/sensor. In the same vein, a tube can be stuck in the water and air pressure can be applied to the tube. The prssure remains constant at the point where air bubbles out of the bottom of the tube. Great for liquids that are dirty.
2007-02-06 10:07:43 · answer #3 · answered by Yellow Tail 3 · 0⤊ 0⤋
A potentiometer is a variable resistor that varies as you turn the shaft on it like a volume control on a radio or a light dimmer. You definitely have me stumped.
2007-02-06 10:02:50 · answer #4 · answered by Gene 7 · 0⤊ 0⤋