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STT700
·Temperature

STT700

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The Honeywell SmartLine® STT700 is a single- or dual-input temperature transmitter supporting RTD, thermocouple, and millivolt sensors, offered with HART or Honeywell Digitally Enhanced (DE) protocol. Its versatility (single/dual input, 2/3/4-wire sensors, multiple mounting options, optional display) lets sites standardize on one model across the plant — simplifying support, spares, and training.

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Key Benefits
  • 01Digital accuracy up to ±0.15 °C for Pt100
  • 0210-year stability of ±0.05% of URL per year
  • 03Single- or dual-input (difference, average, redundant) with versatile mounting options
  • 04Fast response: 500 ms single input, 1 s dual input
  • 05SIL 2/3 compliance and 4-year warranty option
Technical Features
  • 01Single or dual sensor input: RTD, thermocouple, millivolt
  • 022-, 3-, or 4-wire RTD connections
  • 03Output and communication options: 4–20 mA DC, HART 7.0, Honeywell Digitally Enhanced (DE)
  • 04Digital accuracy up to ±0.15 °C for Pt100
  • 05Stability: ±0.05% of URL per year for 10 years
  • 06Update time: 500 ms (single input) / 1 s (dual input)
  • 07Built-in galvanic isolation
  • 08Sensor-break detection with NAMUR 89 support
  • 09Direct entry of Callendar–Van Dusen coefficients (R₀, α, β, δ) for calibrated RTDs
  • 10SIL 2/3 compliant with comprehensive on-board diagnostics
  • 11Polarity-insensitive loop wiring
  • 12Mounting options: DIN Form A sensor-head aluminum housing, wall, pipe, DIN Rail, single-compartment field housing
  • 13Optional modular alphanumeric LCD with 0°/90°/180°/270° rotation
  • 14Integral 3-button basic device configuration (range / units / loop test / zero-span)
  • 15Field Device Manager (FDM) and MCT404 handheld support
Applications
  • Plant-wide temperature standardization on a single transmitter model
  • Dual-sensor redundant or difference/average measurement
  • HART or legacy DE environments requiring a unified replacement transmitter
  • Mounting-diverse projects (head mount, wall, pipe, DIN rail, field enclosure)
  • Safety-critical temperature loops (SIL 2/3)
  • Process plants migrating from competitive transmitters onto SmartLine
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