The Dwyer 160E00 Ellipsoidal Tip Pitot Tube 0.2 M Insertion Length uses a precision crafted tip configuration, which allows air to pass smoothly with minimum turbulence for consistent, reliable readings. The ellipsoidal tip design offers improved accuracy. Sliding depth indicators grip firmly to ensure uniform insertion when measuring traverses across ducts, and are adjustable for fast, consistent traverses. Orientation can be visually determined by observing the alignment arm which is parallel to the tip. Total and static pressure taps are 1/4in (6 mm) and are permanently silver soldered to the connection block, making them leak-proof and durable.