Key Benefits and Advantages
Direct Flush Diaphragm Mounting: The STF700 is engineered to mount directly to tank nozzles. Its flush diaphragm design is ideal for measuring levels in processes containing solids or high-viscosity media that would typically plug small-diameter impulse lines, ensuring a clear and continuous pressure signal.
Optimized for Liquid Level and Density: With a reference accuracy of up to 0.065% of span, the STF700 is optimized for hydrostatic head measurement. It provides the precision necessary for calculated volume and density monitoring in both open (vented) and pressurized storage tanks.
Modular Replacement System: Like all transmitters in the SmartLine family, the STF700 features a modular architecture. The display, communication module, and electronics can be easily swapped in the field. This allows users to change communication protocols or replace components without removing the transmitter from the tank flange.
High Thermal Stability: Process tanks are often subject to ambient temperature swings and process heat. The STF700 includes advanced internal temperature compensation to ensure the level reading remains stable and accurate, even in outdoor installations or high-temperature process conditions.
Seamless System Integration: Supporting HART 7, Honeywell DE, FOUNDATION Fieldbus, and PROFIBUS PA, the STF700 integrates effortlessly into any control system. This ensures that detailed diagnostic data and level variables are always available to the operators.
Standard Safety Certification: For peace of mind in critical applications, the STF700 comes standard with SIL 2/3 certification. This makes it a reliable component for overfill protection and safety-instrumented systems across the chemical and oil sectors.
Technical Properties
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Measurement Type: Hydrostatic Level (Differential Pressure based).
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Reference Accuracy: 0.065% of span.
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Stability: 0.02% of URL per year for 5 years.
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Turndown Ratio: Up to 100:1.
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Communication: HART 7, DE, FOUNDATION Fieldbus, or PROFIBUS PA.
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Flange Options: 2-inch, 3-inch, or 4-inch (ANSI/ASME or DIN).
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Wetted Materials: 316L Stainless Steel, Hastelloy C-276, Monel, or Tantalum.
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Fill Fluids: Silicone Oil, Fluorinated Oil, or Neobee M-20 (Food Grade).
Field of Application
The STF700 is the ideal choice for liquid level measurement where process contact is best handled via a flange.
Primary Industries and Uses:
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Chemical & Petrochemical: Level monitoring in storage tanks, blending vessels, and reactors.
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Food and Beverage: Measuring levels in syrups, oils, and dairy products using hygienic fill fluids.
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Pulp and Paper: Monitoring stock levels in chests and tanks where fibers could clog standard ports.
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Water & Wastewater: Reliable level sensing in large basins and chemical dosing tanks.
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Pharmaceutical: Volume tracking in fermentation and solvent storage tanks.
