3-Dimensional Probe (5-Hole Pitot)

The Apex Instruments 3-D Pitot is capable of measuring yaw and pitch of nonuniform flows. The yaw angle is determined directly by rotating the pitot to the pressure across a pair of symmetrically placed ports on the pitot head. The yaw angle is measured with a remote inclinometer attached to the probe extension and digitally displayed on the console. The pitch angle is calculated using probe specific calibration curves. The average gas volumetric flow rate in the stack or duct is then determined from the average axial velocity.