Inline or Insertion Mass Flow of Gases Integral Control Valve Available Ranges Up to 30,000 sfpm Low Flow Units 0 to 5 sccm  100:1 Turn Down (Min.) Accuracy of +\- 1% of Reading, 0.5% of F.S. Repeatability of +\- 0.2% of F.S. -40 to +392 F 115 VAC or 24 VDC Integral or Remote Electronic 0-5 Vdc and 4-20 Madc Outputs Class 1 Div. 1, Grps. B, C & D and NEMA 4X Pipes, Ducts, Stacks Air, N2, O2, CH4, etc.