Differential Pressure Transmitter – SmartLine STD700
SmartLine® ST700 Differential Pressure Transmitters bring smart technology to a wide spectrum of measurement applications ranging from furnace combustion airflow rate to hydrostatic tank gauging.
SmartLine® ST700 Differential Pressure Transmitters bring smart technology to a wide spectrum of measurement applications ranging from furnace combustion airflow rate to hydrostatic tank gauging.
ST700 Differential Pressure Transmitters are ideal for critical process loops and high-value applications such as custody transfer, and energy and material balances. Six models are available with variety of ranges.
Uses piezoresistive sensor technology.
On‑chip compensation for static pressure and temperature to improve accuracy and stability.
Standard accuracy: 0.05% of span, with optional 0.04% span versions.
Very good long-term stability: up to 0.02% of URL per year (10‑year spec).
Rangeability (turndown) of up to 100:1.
STD720 / STD725: –400 to +400 inH₂O (or –1000 to +1000 mbar)
STD730 / STD735: –100 to +100 psi (–7.0 to +7.0 bar)
STD770 / STD775: –3000 to +3000 psi (–210 to +210 bar)
Response time as fast as 100 ms.
Adjustable damping / filtering (user can configure to smooth signal) via configuration.
On‑board diagnostics for device health monitoring.
Dual-seal design for safety, meeting ANSI/NFPA 70‑202 and ISA 12.27.0 standards.
Overpressure protection built into the design.
Functional safety capable: SIL 2 / SIL 3 versions available.
Output & comms options: HART v7, Honeywell Digitally Enhanced (DE), FOUNDATION™ Fieldbus.
External access for zero / span / configuration.
Polarity‑insensitive electrical connections → safer / easier wiring.
Wetted parts / process-pressure surfaces: e.g., 316L stainless steel is standard; other materials (Hastelloy C‑276, etc.) available.
Fill fluid options: typical oils depending on temperature / application.
Modular transmitter design: electronics, display, and meter body can be swapped in the field.
Alphanumeric LCD display available.
External buttons (or module) for configuring zero, span, and other settings.
Safety / hazardous-area: ATEX, IECEx (depending on variant) per ST700 family.
Integrated with Honeywell Experion PKS for tight system integration and tested compatibility