Key Benefits and Advantages
Exceptional Total Performance: The STD700 offers a reference accuracy of up to 0.065% of span. More importantly, it features on-chip temperature compensation that ensures the measurement remains accurate despite fluctuations in ambient or process temperatures, maintaining a stability of 0.02% of URL per year.
Modular Construction for Maintenance Efficiency: The SmartLine family features a unique modular design. The electronics module, display, and terminal block are interchangeable across the series. This allows technicians to perform repairs or change communication protocols in the field without removing the meter body from the process piping.
Integrated Static Pressure Compensation: The STD700 sensor is designed to handle high static pressures. Internal compensation algorithms automatically correct for the physical effects of high-line pressure on the differential sensor, which is critical for maintaining accuracy in high-pressure steam flow or deep-tank level applications.
Flexible Communication Protocols: To ensure compatibility with existing and future plant architectures, the STD700 supports all major industrial protocols including HART 7, Honeywell Digitally Enhanced (DE), FOUNDATION Fieldbus, and PROFIBUS PA.
Enhanced Safety and Reliability: Every STD700 is SIL 2/3 certified as a standard feature. It also includes “Smart Connection” features, such as a dual-seal design and polarity-insensitive wiring, which protects the device from common installation errors and environmental leaks.
Intuitive Local Interface: The optional LCD display provides clear, alphanumeric status messages and process variables. In its advanced graphics version, the display can show bar graphs and trend charts, allowing for immediate local diagnostics without a handheld terminal.
Technical Properties
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Measurement Type: Differential Pressure (STD700).
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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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Enclosure Rating: IP66/67 and NEMA 4X.
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Wetted Materials: 316L Stainless Steel, Hastelloy C-276, or Monel.
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Static Pressure Rating: Up to 4,500 psi (310 bar).
Field of Application
The STD700 is a versatile workhorse suitable for a broad spectrum of pressure-drop measurements.
Primary Industries and Uses:
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Flow Measurement: Monitoring gas, steam, or liquid flow when used with primary elements like orifice plates or Pitot tubes.
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Hydrostatic Level: Measuring the level in pressurized tanks (high-pressure side at the bottom, low-pressure side at the top).
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Filter & Heat Exchanger Monitoring: Tracking the pressure drop across filters or heat exchanger tubes to optimize cleaning cycles.
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Oil & Gas: Reliable measurement in separation units and distribution manifolds.
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Pulp & Paper: Managing pressure differentials in processing and bleaching lines.
