Description
Honeywell STT750 is the premium variant in the SmartLine temperature transmitter series, offering ultra-high accuracy, SIL3 compliance, extended diagnostics, and extreme environmental endurance. It is engineered for the most critical temperature loops: refinery heaters, steam super-heat, LNG cryogenic lines, pharma sterilization, incinerators, chemical reactors, and nuclear-grade heat monitoring.
Honeywell STT750 — Key Technical Data & Selection Parameters
| Parameter | Specification / Details |
| Transmitter Type | Smart Temperature Transmitter (Head / Field / Rail mounting options) |
| Output | 4–20 mA, HART 7, supports FDT/DTM |
| Accuracy | ±0.0375% of span (ultra-premium accuracy class) |
| Stability | < ±0.01%/year for 10 years |
| Sensor Inputs | RTD (Pt100/Pt1000), TC (J, K, T, R, S, B, N, E), mV & Ω |
| Safety Certification | SIL2/SIL3 TÜV functional safety approved |
| Ambient Range | –40 °C to +85 °C (electronics) |
| Process Temperature Range | –200 °C to +1200 °C (depending on RTD/TC type) |
| EMI/EMC Protection | Class A, IEC 61326-3-1, heavy industrial protection |
| Ingress Protection | IP67 / IP68 (Field housing option) |
| Diagnostics | Full health diagnostics, drift alert, sensor burnout, loop integrity |
| Damping | Programmable 0.1 to 60 seconds |
| Communication Protocols | HART 7, AMS integration, Experion native interface |
| Configuration | Handheld HART / SmartLine software / DCS integration |
| Response Time | <0.3 seconds |
| Mounting | DIN head / remote field housing |
| Approvals | SIL3, ATEX, IECEx, FM, CSA, CE, Marine approvals |
| Industries | LNG, Oil & Gas, Power, Refinery, Pharma, Nuclear, Chemical |
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