·Temperature
STT750
The Honeywell SmartLine® STT750 is a high-performance, value temperature transmitter delivering industry-leading stability and speed for the most demanding measurement applications. Its dual-compartment housing, built-in galvanic isolation, and 125 ms update time combine with 10-year stability of ±0.01% of URL per year — significantly ahead of the STT700 — making it ideal for precision-critical loops.
Key Benefits
- 01Industry-leading 10-year stability: ±0.01% of URL per year
- 02Fastest update time in the SmartLine family at 125 ms
- 03Digital accuracy up to ±0.14 °C for RTD
- 04Dual-compartment housing separates sensitive electronics from field wiring
- 05SIL 2/3 compliance with 4-year warranty option
Technical Features
- 01Universal input: RTD, thermocouple, millivolt
- 02Output and communication options: 4–20 mA DC, HART 7.0
- 03Digital accuracy up to ±0.14 °C for RTD
- 04Stability: ±0.01% of URL per year for 10 years
- 05Update time: 125 ms
- 06Built-in galvanic isolation
- 07Dual-compartment housing with isolated button compartment
- 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
- 12Modular basic alphanumeric LCD display (0°/90°/180°/270° rotation)
- 13Up to 8 display screens with 3–30 s configurable auto/manual rotation
- 14Displays up to 6 data points: Loop PV, CJ Temperature, Sensor, RTD Resistance, Loop Output, Percent Loop
- 15Out-of-range indication and PV status / critical fault display
- 16Integral 3-button configuration (range / units / loop test / zero-span)
- 17Field-replaceable modules in IS environments without violating approvals
Applications
- Precision-critical temperature measurement requiring minimal drift
- High-ambient-temperature plant areas where stability matters
- Long-warranty and low-TCO temperature loops
- Safety-critical temperature loops (SIL 2/3)
- Dual-compartment requirement (field-wiring isolation from electronics)
- Fast-response process control loops (125 ms update)
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