SmartLine® ST800 Gauge Pressure Transmitters offer exceptional performance and are ideal for high-pressure measurements in boilers and fuel feeds, and tank level measurement applications with a relatively high process temperature.
ST800 Dual Head Gauge Pressure Transmitters are suited for applications requiring small flange or 1/2” NPT connections. Typical applications include gauge pressure measurement of reaction vessels in the chemical industry and level applications with process temperatures of up to 302°F /150°C. In-Line transmitters are screwed directly onto a 1/2” male NPT nipple and can be installed in hazardous environments for accurate, repeatable pressure measurement. Typical applications include high-pressure measurement in boilers, fuel feeds and high-pressure reaction vessels in the petrochemical and hydrocarbon recovery industries.
Measures gauge pressure (relative to atmospheric pressure).
STG830 / STG83L → 0–50 psi (0–3.5 bar)
STG840 / STG84L → 0–500 psi (0–35 bar)
STG870 / STG87L → 0–3,000 psi (0–210 bar)
STG88L → 0–6,000 psi (0–415 bar)
STG89L → 0–10,000 psi (0–690 bar)
Very high accuracy: up to 0.0375% of span for some models, with optional down to 0.025%.
Excellent long‑term stability: for example, 0.015% of URL per year (for certain models) per spec.
Automatic compensation for both process temperature and static pressure to maintain high measurement fidelity.
Designed for use in high-temperature processes: can handle process temperatures up to ~150 °C (302 °F) for some versions.
Fast response time: as low as 80 ms for some variants.
High rangeability (turndown): up to 100:1.
On-board diagnostics for health monitoring.
Optional Plugged Impulse Line Detection (PILD) to detect blocked impulse lines.
Integral dual-seal design for safety, compliant with ANSI/NFPA 70-202 and ISA 12.27.0.
Functional safety capable: SIL 2 / SIL 3 options.
Supports 4‑20 mA analog output.
Digital protocols: HART (v7), FOUNDATION™ Fieldbus, and Honeywell Digitally Enhanced (DE).
External zero, span, and configuration capability.
Polarity-insensitive terminal design (makes wiring safer / easier).
Process connection options: ½″ NPT internal thread, or flange.
Wetted materials: 316L stainless steel diaphragm (among others depending on model).
Modular design: meter body, electronics, and indicators are field-replaceable without losing performance or approvals.
Hazardous-area certifications: ATEX, IECEx options are available.
Multiple-language support for configuration / interface (EN, DE, FR, ES, etc.).
Long warranty option: up to 15 years for certain models / users.