Technical Parameters Parameter Specification Model Fisher 4200 Type Pneumatic Torque Tube Level Transmitter Measurement Principle Buoyancy (Torque Tube) Output Signal 3 to 15 psig (0.2 to 1.0 bar) Supply Air Pressure 20 psig (1.4 bar) minimum, typically 20-35 psig (1.4-2.4 bar) is supplied. Air Consumption Very low at steady state; typically < 0.1 SCFM (0.17 m³/hr). Mounting Top-mounted (suspended from the top of the vessel). Displacer Lengths Available in a wide range of standard lengths to match the required level measurement span. Process Connections Typically 2-inch or 3-inch NPT or 150# / 300# Flange. Body Materials Cast Steel, Carbon Steel, Stainless Steel Displacer & Torque Tube Stainless Steel (standard), Monel, and other alloys available for corrosive services. Temperature Limits Standard: -20°F to 450°F (-29°C to 232°C). High-Temp versions available up to 850°F (454°C). Pressure Rating Up to 3000 psig (207 bar) depending on model and torque tube rating.
