Standard Low-Flow Switches are normally closed (NC) but can be wired for normally open (NO). Typical applications include chemical process and vapor deposition systems; industrial gas lines; pollution control monitoring; atmospheric furnaces; and leak detection.| Choose from a brass switch (32929-10, -14) for pressures up to 1500 psi, or a switch made from PTFE (32929-12, -16) for good chemical compatibility. Wetted materials are brass, epoxy, and Viton for models 32929-10 and -14; PTFE for models 32929-12 and -16. Repeatability is <tol>2%. Measure 1-Â¾''W x 2-5/8''H x Â¾''D.