The static pressure head is typically measured by determining the height of a liquid column above a reference point.
Here's a breakdown of how to measure static pressure head:
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Using a Piezometer: This is the simplest method, suitable when measuring static pressure in a liquid at rest. A piezometer is a vertical tube connected to the point where you want to measure the pressure. The height of the liquid column in the tube directly represents the static pressure head. The formula to calculate the static pressure is:
- Static Pressure = ρgh
- Where:
- ρ = density of the liquid
- g = acceleration due to gravity
- h = height of the liquid column (static head)
- Where:
- Static Pressure = ρgh
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Using a Pressure Transducer: A pressure transducer converts pressure into an electrical signal. These are more versatile than piezometers and can be used in dynamic systems or where direct observation of a liquid column is impractical. The transducer needs to be calibrated to provide accurate readings.
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Calculation from Height (in Water): If you know the height of a water column, you can calculate the static pressure head. As mentioned in the reference video, you can multiply the height of the water in meters by 9.8 kPa to find the static pressure. This uses the formula mentioned above, with water as the liquid and assuming standard gravity.
For example, if you have a height of water equal to 1 meter, the static pressure will be about 9.8 kPa.
