Series 160S "S" Type Stainless Steel Pitot Tube: Product Details: Model Series 160S Material Stainless Steel Shape S type Tube diameter 5/16 inch Connection type 1/8 inch Female NPT connections Tube inner diameter 1/8 to 3/16 inch Series 160S Pitot Tubes are designed specifically for flow measurement of dirty, particulate-laden air or gas streams typical of the smokestack and another environmental testing. Large diameter stainless steel tubing resists plugging under harsh, sooty conditions which quickly block conventional flow sensors. Total and static pressure tubes are precisely aligned and welded together every six inches for maximum accuracy, strength and long-term durability. Versatile female NPT connections easily adapt to any type of pipe or tubing. A pair of I.D. tubing adapters is included plus a handy molded vinyl cap to protect tip when not in use. Supplied with complete instructions. Permanent Mounting (PM) models include welded stainless steel sleeve and adjustable compression fitting with male 1-including threads. Adjust depth, lock in place.