YOKOGAWA SNT401-5F – 2-Wire Smart Temperature Transmitter | STARDOM / YTA Series Field Instruments
Engineering Background: The YOKOGAWA SNT401-5F is a field-proven 2-wire smart temperature transmitter engineered for demanding process industries including oil & gas, chemical, power generation, and water treatment. Built on YOKOGAWA’s decades of precision measurement expertise, the SNT401-5F delivers stable, accurate temperature signals across a wide range of sensor inputs — from RTD to thermocouple — with HART dual-protocol communication for seamless DCS/PLC integration.
Product Positioning: Designed for procurement engineers and system integrators who require a reliable, HART-compatible temperature transmitter with universal sensor input, DIN rail or direct-mount capability, and long-term field durability. The SNT401-5F is a direct replacement and upgrade path for legacy analog transmitters in both greenfield and brownfield installations. Available through Konmask.com with full traceability documentation and fast global shipping.
Complete Technical Specifications
| Model / SKU | SNT401-5F |
| Manufacturer | YOKOGAWA Electric Corporation |
| Series / Platform | YTA Series / STARDOM Field Instruments |
| Transmitter Type | 2-Wire Smart Temperature Transmitter |
| Sensor Input | RTD (Pt100, Pt200, Pt500, Pt1000, JPt100), Thermocouple (B, E, J, K, N, R, S, T), mV, Ω |
| Output Signal | 4–20 mA DC with HART Communication (FSK) |
| Accuracy | ±0.1°C (RTD) / ±0.2°C (Thermocouple) |
| Ambient Temperature Range | –40 to +85°C (–40 to +185°F) |
| Supply Voltage | 10.5 to 42.4 V DC |
| Load Resistance | 0 to 1650 Ω (at 24 V DC) |
| Enclosure Rating | IP66 / IP67 (NEMA 4X) |
| Explosion Protection | Intrinsically Safe (Ex ia) / Flameproof (Ex d) |
| Mounting Options | DIN Rail / Direct Mount / Remote Mount |
| Housing Material | Aluminum Alloy (Stainless Steel optional) |
| Weight | Approx. 600 g |
| Communication Protocol | HART 5 / HART 7 |
| Safety Certifications | ATEX, IECEx, FM, CSA, CE, SIL 2 (IEC 61508) |
| Country of Origin | Japan |
Proven Application Environments
- Oil & Gas: Wellhead temperature monitoring, pipeline process control, separator temperature loops
- Chemical & Petrochemical: Reactor temperature measurement, distillation column control, heat exchanger monitoring
- Power Generation: Turbine inlet/outlet temperature, boiler drum temperature, cooling water systems
- Water & Wastewater: Effluent temperature monitoring, treatment process control
- Pharmaceutical: Clean-room process temperature, sterilization cycle monitoring
- Pulp & Paper: Dryer section temperature, digester process control
Engineering Advantages
- Universal Sensor Input: Accepts RTD, thermocouple, mV, and resistance inputs — one transmitter covers multiple sensor types, reducing spare parts inventory
- HART Dual-Protocol: Compatible with HART 5 and HART 7, enabling seamless integration with existing asset management systems (AMS, PRM)
- High Accuracy & Stability: ±0.1°C RTD accuracy with long-term drift <0.1°C/year, minimizing recalibration frequency
- SIL 2 Certified: Suitable for safety instrumented systems (SIS) per IEC 61508, supporting functional safety requirements
- Wide Ambient Range: Operates reliably from –40°C to +85°C, suitable for arctic and tropical field installations
- Robust Enclosure: IP66/IP67 rated aluminum housing withstands washdown, dust ingress, and corrosive atmospheres
- Easy Configuration: Configurable via HART handheld communicator or YOKOGAWA PRM software without loop interruption
System Architecture & Signal Flow
The SNT401-5F integrates directly into standard 4–20 mA process loops. The sensor signal (RTD/TC) is conditioned by the internal microprocessor, linearized, and converted to a proportional 4–20 mA output. HART digital communication is superimposed on the analog signal, allowing simultaneous process variable transmission and remote configuration. The transmitter is compatible with YOKOGAWA CENTUM VP DCS, ProSafe-RS SIS, and third-party PLC/DCS systems via standard HART I/O cards.
Typical Signal Flow: Sensor → SNT401-5F → 4–20 mA Loop → HART Multiplexer / AI Card → DCS/PLC → HMI/SCADA
Sourcing & Quality Verification
- All units sourced through authorized YOKOGAWA distribution channels or verified surplus with full traceability documentation
- Each unit inspected for physical integrity, label authenticity, and firmware version prior to shipment
- Original YOKOGAWA packaging, calibration certificates, and instruction manuals included where available
- Counterfeit-risk assessment performed: serial number cross-referenced against YOKOGAWA production records on request
- Konmask.com maintains ISO-aligned quality inspection records for all stocked automation components
Procurement Process
- Inquiry: Submit your RFQ with required quantity, delivery timeline, and destination via support@konmask.com or the product page inquiry form
- Quotation: Receive a formal quotation within 1 business day including unit price, lead time, and shipping options
- Order Confirmation: Purchase order accepted via email; proforma invoice issued for payment processing
- Quality Inspection: Pre-shipment inspection report provided upon request
- Shipping: DHL / FedEx / UPS express available; sea freight for bulk orders; export documentation (CO, packing list, commercial invoice) included
- After-Sales: Technical support available post-delivery; warranty claims handled within 7 business days
Technical FAQ
Q: Is the SNT401-5F compatible with HART 7 asset management systems?
A: Yes. The SNT401-5F supports both HART 5 and HART 7 protocols, ensuring compatibility with modern AMS platforms including Emerson AMS Device Manager and YOKOGAWA PRM.
Q: Can this transmitter be used in SIL 2 safety loops?
A: Yes. The SNT401-5F carries SIL 2 certification per IEC 61508 and can be deployed in safety instrumented functions (SIF) with appropriate SIL verification documentation.
Q: What sensor types are supported without hardware modification?
A: The SNT401-5F accepts RTD (Pt100/200/500/1000, JPt100), all standard thermocouple types (B/E/J/K/N/R/S/T), millivolt inputs, and resistance inputs — all configurable via HART without opening the housing.
Q: What is the typical lead time for in-stock units?
A: In-stock units ship within 2–3 business days. For units requiring sourcing, typical lead time is 2–4 weeks. Contact us for real-time availability.
Q: Do you provide calibration certificates?
A: Original YOKOGAWA calibration certificates are included where available. Third-party calibration can be arranged upon request at additional cost.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
