STF725 Flange Mount Transmitters SmartLine STF700 Level Transmitter

STF725 Flange Mount Transmitters SmartLine STF700 Level Transmitter

The Honeywell STF725 is a high-precision, flange-mount pressure transmitter from Honeywell’s SmartLine ST700 series, designed for critical process control applications such as liquid level measurement and pressure monitoring in industrial environments

Key Features & Specifications

• High Accuracy & Long-Term Stability
  Offers standard accuracy of 0.05% of span and stability up to 0.02% of URL per year over a decade
• Wide Measurement Range
  Ideal for liquid level or low-pressure applications: up to ±400 in H₂O (±1000 mbar)
• Robust Construction
• Flange-mounted diaphragm available in flush or extended configurations
• Process-wetted materials: 316L stainless steel or Hastelloy C-276
• Electronic housing: polyester powder-coated aluminum or all-SS options
• Ingress protection rating: IP66/IP67 / Type 4X
• Smart Diagnostics & Communication
• 4–20 mA output with HART protocol; optional Foundation Fieldbus or digital enhanced modes
• Comprehensive onboard diagnostics: critical/non-critical alerts, sensor communication, overpressure, temperature, etc.
• Process & Safety Reliability
  Dual-seal design compliant with ANSI/NFPA 70‑202 & ISA 12.27.0, built-in overpressure protection, SIL2/SIL3 capable
• Excellent Rangeability & Fast Response
  Rangeability up to 100:1; response times as quick as 90–100 ms

Typical Applications

• Tank level measurement (hydrostatic principle)
• Boilers and fuel systems (high-pressure scenarios)
• Chemical/petrochemical process vessels (dual-head gauge usage)
• Custody transfer, energy balances, and critical control loops

Available Options

• Diaphragm styles: flush or extended
• Flange variants: ANSI or DIN (2″, 3″, 4″)
• Materials: 316 SS, Hastelloy, carbon steel with zinc plating, etc.
• Approvals: ATEX, IECEx, FM, CSA, SIL2/3, marine (DNV/ABS/BV)
• Display & configuration: multiple display options; external zero/span adjustment; handheld HART interface

Summary