·Temperature
STT650
The Honeywell SmartLine® STT650 is a DIN-Rail-mounted, universal-input temperature transmitter engineered for high-accuracy and high-stability measurement across a wide range of process and ambient conditions. Single or dual-channel options save panel space, and a full set of digital protocols (HART 7, FOUNDATION™ Fieldbus, PROFIBUS PA) make it a drop-in modernization for legacy panels.
Key Benefits
- 01High RTD accuracy of ±0.1 °C with fast 135 ms update
- 02Stable measurement — 0.12% of span for two years
- 03Built-in 1500 VAC galvanic isolation with superior noise immunity
- 04Dual-channel option saves panel space versus two single-input transmitters
- 05Can double as a position or level transmitter for valves and ohmic level sensors
Technical Features
- 01DIN Rail mounting for panel and cabinet installations
- 02Universal input: RTD (Pt100, Ni100), Thermocouple, Ohm, mV
- 03Single or dual-channel versions
- 04Output and communication options: 4–20 mA DC, HART 7.0, FOUNDATION™ Fieldbus (ITK 4.6 compliant), PROFIBUS® PA v3.0
- 05Basic accuracy: ±0.1% of span (±0.3 °C) for Pt100 over -200 to 850 °C
- 06Response / update time: up to 135 ms
- 07Stability: 0.12% of span for 2 years
- 08Built-in 1500 VAC galvanic isolation
- 09NAMUR NE43 / NAMUR 89 sensor error and wire-break detection
- 10EMC tested: 10 V/m radiated, 10 Vrms conducted, 2.5 kV burst, 2 kV surge
- 11Configuration via STT17C PC tool
Applications
- Panel-mounted temperature monitoring in process control cabinets
- High-density signal conversion from RTD/TC/mV/Ohm to fieldbus
- Retrofitting legacy multiplexer panels with modern HART/FF/PROFIBUS
- Position feedback on valves and ohmic level sensors
- Process plants requiring dual-channel redundancy in a compact footprint
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