The flow sensor shall be an insertion type with a non-magnetic, spinning impeller (paddle wheel) as the only moving part. The sensor sleeve will be brass (or 316 stainless steel) with the sensor housing being PPS. The impeller shall be glass-filled nylon or Tefzel â with a UHMPWE or Tefzel Sleeve bearing. The shaft material shall be tungsten carbide. The sensor shall be supplied with a 2" NPT adapter for installation into any commercially available weld-on fitting or pipe saddle. The adapter shall have two ethylene-propylene O- Rings. The sensor will have all electronics epoxy-sealed with a 2-conductor, shielded cable extending out through a 1/2" conduit connection on the top of the sensor. Insertion of the sensor into any pipe size shall be 11/2" from the inside of wall to the end of the sensor housing. The sensor shall operate in line pressures up to 400 psi and liquid temperatures up to 220° F, and operate in flows of 1 foot per second to 30 feet per second in pipes of 3" diameter up to 40" in diameter with linearity of + 1% and repeatability of + 1%.