Key Benefits and Advantages
Elimination of Process Clogging: The ST73SP features a flush diaphragm that prevents the accumulation of fibers, solids, or high-viscosity liquids. By removing the cavity or “dead space” found in traditional 1/2-inch NPT transmitters, the ST73SP ensures that process media like paper stock or resin cannot settle and harden, ensuring continuous and accurate measurement.
Exceptional Precision and Stability: With a reference accuracy of 0.065% of span, the ST73SP provides the tight control required for high-quality production. Its stable sensor technology maintains a 0.02% URL stability per year, reducing the need for frequent maintenance and recalibration in demanding plant environments.
Seamless Modular Design: Like all SmartLine transmitters, the ST73SP utilizes a modular architecture. The display and electronics can be replaced or upgraded independently without disturbing the process connection. This “plug-and-play” capability allows for rapid field service and lowers the total cost of ownership.
Rugged Piezoresistive Sensing: The transmitter employs advanced piezoresistive sensor technology, which provides inherent temperature compensation. This ensures that the pressure signal remains accurate even during the temperature swings common in pulp cooking or chemical exothermic reactions.
Integrated Safety and Diagnostics: The ST73SP is SIL 2/3 certified as a standard feature. It provides advanced internal diagnostics that monitor the health of the sensor and the loop, providing early warning alerts to the control system before a failure occurs.
Flexible Communication: Whether your plant uses traditional 4-20mA loops or modern fieldbus architectures, the ST73SP is ready. It supports HART 7, Honeywell Digitally Enhanced (DE), FOUNDATION Fieldbus, and PROFIBUS PA.
Technical Properties
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Measurement Type: Gauge Pressure (1-inch Flush Mount).
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Reference Accuracy: 0.065% of span.
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Range: Up to 100 psi (7 bar) or as per specific range coding.
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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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Enclosure Rating: IP66/67 and NEMA 4X.
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Wetted Materials: 316L Stainless Steel or Hastelloy C-276.
Field of Application
The ST73SP is specifically optimized for media with high solids content or high viscosity.
Primary Industries and Uses:
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Pulp and Paper: Monitoring pressure in headboxes, blow tanks, and stock lines.
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Wastewater Treatment: Measuring sludge pressure and thickener flows.
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Chemical Manufacturing: Handling polymers, adhesives, and coatings that solidify in stagnant zones.
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Paints and Pigments: Reliable measurement in mixing tanks and transfer lines.
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Mining: Managing pressures in slurry transport and processing.
