Key Benefits and Advantages
Reliable Vacuum Measurement: The STA700 is specifically characterized to provide accurate readings in vacuum ranges. This is essential for maintaining product quality in vacuum-based processes where even slight deviations from the absolute zero reference can lead to significant errors in boiling point calculations or chemical reactions.
On-Chip Temperature Compensation: Each sensor is calibrated at the factory to account for temperature variations. The transmitter dynamically adjusts its output based on the process and ambient temperature, ensuring that the absolute pressure reading remains stable whether the instrument is installed in an indoor lab or an outdoor refinery.
Modular Component Architecture: To reduce maintenance costs and downtime, the STA700 features a modular design. The communication module, alphanumeric display, and electronic housing can be replaced or upgraded independently without removing the transmitter from the process line.
Multiple Communication Protocols: The STA700 integrates seamlessly with modern control systems. It supports HART 7 for traditional analog loops, as well as Honeywell’s Digitally Enhanced (DE) protocol, FOUNDATION Fieldbus, and PROFIBUS PA for fully digital architectures.
Low Cost of Ownership: With a stability rating of 0.02% of the Upper Range Limit (URL) per year for five years, the STA700 extends the intervals between manual calibrations. This longevity, combined with its robust construction, lowers the total lifecycle cost of the instrument.
SIL 2/3 Certified Standard: For plants prioritizing safety, the STA700 comes standard with SIL 2 (single use) and SIL 3 (redundant use) certification. This allows the transmitter to be used in Safety Instrumented Systems (SIS) for critical process trips and interlocks.
Technical Properties
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Measurement Type: Absolute Pressure.
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Reference Accuracy: Up to 0.065% of span.
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Stability: 0.02% 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.
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Process Connection: 1/2-inch NPT (Female) or 1/4-inch NPT (Female).
Field of Application
The STA700 is ideal for any process where a stable zero-absolute reference is required.
Primary Industries and Uses:
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Vacuum Distillation: Monitoring pressure at the top of distillation columns in chemical and oil refining.
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Power Generation: Measuring condenser vacuum levels to ensure optimal turbine performance.
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Pharmaceutical: Managing vacuum levels in drying ovens and freeze-drying (lyophilization) equipment.
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Food and Beverage: Controlling absolute pressure in evaporation and concentration stages.
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Environmental: Monitoring atmospheric barometric pressure for emissions testing and local weather data.
