Key Benefits and Advantages
Industry-Leading Total Performance: The STD800 provides a reference accuracy of up to 0.035% of span. More importantly, its total performance—which includes the effects of temperature and static pressure—is among the best in the industry, ensuring that the measurement you see in the control room is the true process value.
On-Board Static Pressure Measurement: Unlike traditional transmitters, the STD800 sensor can measure both differential and static pressure simultaneously. This data is used to dynamically compensate the DP reading for high-line pressure effects, a common source of error in orifice plate flow measurements and high-pressure tank level sensing.
Unmatched Long-Term Stability: With a stability rating of 0.01% of the Upper Range Limit (URL) per year for ten years, the STD800 significantly extends calibration intervals. This reliability ensures that safety-critical and high-accuracy loops remain in tolerance longer than standard instruments.
Advanced Graphics Interface: The advanced LCD option provides a rich user experience with support for multiple languages and graphical data representation. Operators can view historical trends and bar graphs directly at the transmitter, facilitating faster local troubleshooting without needing a handheld communicator.
Smart Connection Features: The SmartLine series features a terminal block design that prevents polarity reversals, protecting the electronics from wiring errors during installation. Furthermore, the modular design allows for the electronics or display to be swapped under power (in non-hazardous areas), minimizing maintenance downtime.
SIL 2/3 Certification as Standard: Every STD800 is designed and certified to meet SIL 2 (single use) and SIL 3 (redundant use) requirements. This makes it an ideal choice for Safety Instrumented Systems (SIS) without the need for special model selection.
Technical Properties
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Measurement Type: Differential Pressure (STD800).
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Reference Accuracy: Up to 0.035% of span (Standard) or 0.025% (Optional).
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Stability: 0.01% per year for 10 years.
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Turndown Ratio: Up to 400:1.
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Static Pressure Rating: Up to 4,500 psi (310 bar) standard.
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Communication: HART 7, DE, FOUNDATION Fieldbus, or PROFIBUS PA.
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Materials: 316L SS, 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 STD800 is a versatile instrument suitable for any application requiring precise pressure drop measurement.
Primary Industries and Uses:
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Flow Measurement: Paired with orifice plates, Pitot tubes, or Venturi meters for accurate liquid, gas, or steam flow.
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Hydrostatic Level: Measuring the level in pressurized or vented tanks by sensing the head pressure.
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Filter Monitoring: Detecting the pressure drop across filters or strainers to trigger cleaning or replacement cycles.
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Refining & Petrochemical: High-pressure gas and oil flow measurement in volatile environments.
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Pulp and Paper: Managing consistency and pressure drops in processing lines.
