Technical Specifications Input: Hydrostatic head pressure from liquid level. Output: Standard pneumatic signal: 3-15 psig (0.2-1.0 bar). Air Supply: Typically 20 psig (1.4 bar) clean, dry, instrument air. Accuracy: Typically ±0.5% of span. Span Ranges: Adjustable over a wide range. Common minimum span is around 25 inH₂O (62 mbar), and maximum span can be several hundred inches of water column. Materials of Construction: Case: Aluminum or epoxy-coated cast iron. Wetted Parts: Stainless steel (standard), Monel, Hastelloy C, and others. Process Connections: Various options including 2" NPT, 3" NPT, and ANSI flanges. Typical Applications The Fisher Type 630 is widely used in industries that rely on pneumatic control or have harsh environments: Oil & Gas: Level measurement in separators, scrubbers, and storage tanks. Chemical & Petrochemical: Interface level control in reactors and distillation columns. Power Generation: Drum level measurement and other boiler applications. Water & Wastewater: Level monitoring in treatment tanks and sumps. Pulp & Paper: Chemical level control in various stages of the process.
