Using the plastic tubing, connect the tubing to the valve on the pressure sensor using the barbed Luer connector. 2. Connect the pressure sensor to the data collection system. 3. Fill the reservoir as full of water as possible without spilling. EXAMPLE SETUP USING THE PRESSURE SENSOR COLLECT DATA 4. Hold the pressure sensor and the attached tubing above the water level in the reservoir, and then record the first pressure measurement and corresponding depth (0 cm) in Table 1. 5. Submerge the open end of the tubing from the pressure sensor into the water, lowering the tubing end to a depth of 1 cm. NOTE: The tubing may not be straight, which is not a problem as long as the depth is measured at the point of the open end of the tubing. 6. Record the pressure P and depth h in Table 1. NOTE: At greater depths, a small volume of water may creep up the tubing as the air inside the tubing compresses. In this case, measure the depth h from the surface of the water to the water level inside the tubing. 7. Lower the tube into the water four additional centimeters. 8. Repeat the previous steps until you have recorded the pressure at six depths: 0 cm, 1 cm, 4 cm, 7 cm, 10 cm, and 13 cm. 9. Empty your water reservoir. 3 Data Analysis Table 1: Pressure versus depth in a water column Depth (cm) Pressure (kPa) 0 1 4 7 10 13 1. Plot a graph of pressure versus depth in the blank graph below. Be sure to label both axes with the correct scale and units. Graph 1: Pressure versus depth in a water