644 RTD Transmitter for Industrial Temperature Monitoring and Process Control
Details:
The Rosemount 644 RTD Transmitter is a versatile and reliable solution for industrial temperature monitoring and process control. Designed to deliver high-accuracy measurement and long-term stability, it supports a wide range of RTD and thermocouple sensors. With flexible mounting options including head-mount, field-mount, and DIN rail configurations, the 644 transmitter adapts easily to diverse installation requirements. Its robust construction, advanced diagnostics, and compatibility with HART® and FOUNDATION™ Fieldbus protocols ensure seamless integration into modern control systems. Engineered for demanding environments, the 644 RTD Transmitter provides consistent, trustworthy performance across industries such as oil & gas, chemical, power generation, and pharmaceuticals.
| Feature / Model |
Rosemount 644 RTD Transmitter |
Rosemount 3144P Temperature Transmitter |
Rosemount 248 Temperature Transmitter |
Rosemount 648 Wireless Temperature Transmitter |
| Measurement Inputs |
RTD, Thermocouple, mV, Ω |
RTD, Thermocouple, mV, Ω |
RTD, Thermocouple |
RTD, Thermocouple |
| Accuracy |
±0.15 °C (with RTD) |
±0.10 °C (enhanced RTD) |
±0.25 °C |
±0.15 °C |
| Mounting Options |
Head-mount, Field-mount, DIN rail |
Field-mount |
Head-mount, DIN rail |
Field-mount (wireless) |
| Output Protocols |
4–20 mA HART®, FOUNDATION™ Fieldbus |
4–20 mA HART®, FOUNDATION™ Fieldbus, Profibus PA |
4–20 mA HART® |
WirelessHART® |
| Diagnostics |
Sensor drift, hot backup, thermocouple degradation |
Advanced diagnostics, dual sensor, X-well™ Technology |
Basic diagnostics |
Wireless diagnostics, battery status |
| Safety Certification |
SIL2/3 capable |
SIL2/3 capable |
Not SIL certified |
Not SIL certified |
| Power Supply |
10.5–42.4 VDC |
10.5–42.4 VDC |
10.5–42.4 VDC |
Battery powered |
| Typical Applications |
General process industries, OEMs |
Critical process industries (oil & gas, chemical, power) |
Basic monitoring, utilities |
Remote or hard-to-wire installations |
Product Features – Rosemount 644 RTD Transmitter
- High Measurement Accuracy – Provides precise and stable temperature readings with RTD and thermocouple inputs.
- Flexible Mounting Options – Available in head-mount, field-mount, and DIN rail configurations to suit diverse installation needs.
- Advanced Diagnostics – Detects sensor drift, wiring issues, and thermocouple degradation to improve reliability.
- Multiple Communication Protocols – Supports 4–20 mA HART® and FOUNDATION™ Fieldbus for seamless integration with control systems.
- SIL2/3 Safety Certification – Suitable for use in safety instrumented systems (SIS).
- Rugged and Reliable Design – Built for long-term performance in demanding industrial environments.
- Hot Backup Sensor Support – Ensures continuous operation by automatically switching to a backup sensor if the primary fails.
- Easy Configuration and Maintenance – User-friendly interface and modular design simplify setup and servicing.
Packing:
Certs:
Applications – Rosemount 644 RTD Transmitter
- Oil & Gas – Accurate monitoring of process temperatures in refineries, pipelines, and offshore platforms to ensure safety and efficiency.
- Chemical & Petrochemical – Reliable temperature measurement in reactors, distillation columns, and storage tanks under harsh operating conditions.
- Power Generation – Precise control of boiler, turbine, and cooling system temperatures to optimize performance and reduce downtime.
- Pharmaceutical Manufacturing – Stable and validated temperature monitoring for critical production processes and regulatory compliance.
- Food & Beverage – Hygienic and accurate temperature sensing for pasteurization, sterilization, and quality control.
- Pulp & Paper – Continuous monitoring of digester, bleaching, and drying processes where temperature stability is essential.
- Metals & Mining – Rugged performance in furnaces, smelters, and other high-temperature environments.
Frequently Asked Questions (FAQ)
Q1. What is the Rosemount 644 RTD Transmitter used for?
The 644 is designed for accurate temperature measurement in industrial processes. It converts RTD or thermocouple sensor signals into standardized outputs for monitoring and control systems.
Q2. Which sensor types are supported?
It supports RTDs (2-, 3-, and 4-wire), thermocouples, millivolt, and resistance inputs, making it highly versatile.
Q3. What mounting options are available?
The 644 is available in head-mount, field-mount, and DIN rail configurations, allowing flexible installation.
Q4. What communication protocols does it support?
It offers 4–20 mA HART® and FOUNDATION™ Fieldbus outputs for seamless integration with modern control systems.
Q5. Can it be used in hazardous environments?
Yes. The 644 is available with explosion-proof, intrinsically safe, and flameproof certifications, making it suitable for hazardous areas.
Q6. Does the 644 provide diagnostics?
Yes. It includes advanced diagnostics such as sensor drift detection, thermocouple degradation monitoring, and hot backup sensor switching.
Q7. Is it safety certified?
The 644 is SIL2/3 capable, making it suitable for use in safety instrumented systems (SIS).
Q8. What industries typically use the 644?
It is widely used in oil & gas, chemical, power generation, pharmaceuticals, food & beverage, and pulp & paper industries.
Good Service
- Please send your RFQ to get the latest price.
- Fast Delivery: Items will be shipped within 3–5 working days after receiving payment.
- Flexible Shipping Options: We can ship via UPS / DHL / EMS / FedEx, or use your preferred carrier upon request.
- Large Stock & Competitive Pricing: With ample inventory and variable pricing, we can always offer you a good price. For specific quotations, please get in touch with us directly.
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