Crafted with precision and designed for adaptability, the Rosemount 644 Temperature Transmitter seamlessly integrates with HART, FOUNDATION Fieldbus, or PROFIBUS protocols. Whether you prefer head, field, or rail mounting styles, or require specific enclosure options, this transmitter delivers. Enhance your operational efficiency by incorporating the Local Operator Interface (LOI), allowing field updates without tools. Addressing a spectrum of applications, it boasts advanced diagnostic capabilities, including Hot Backup functionality, sensor drift alerts, and thermocouple degradation monitoring.
Input:Experience ultimate flexibility with dual and single sensor capabilities and universal sensor inputs, compatible with RTD, T/C, mV, and ohms.
Output:Enjoy seamless signal processing with 4-20 mA /HART™ protocol, FOUNDATION™ fieldbus protocol, and PROFIBUS™ PA protocol.
Housing:Select from field mount, DIN A head mount, or rail mount for optimal installation convenience.
Display/Interface:Choose between a user-friendly LCD Display, an enhanced LCD Display with Local Operator Interface (LOI), or an intuitive LED for clear readings.
Diagnostics:Stay informed with basic diagnostics, Hot Backup™ capability, sensor drift alerts, thermocouple degradation monitoring, and min/max tracking.
Calibration Options:Achieve precision with transmitter-sensor matching using Callendar-Van Dusen constants and a comprehensive 5-point calibration process.
Certifications/Approvals:Assured safety and reliability with SIL 2/3 certification to IEC 61508 by an independent third party, suitable for hazardous locations, marine environments, and more.
Versatile Protocol Support:This temperature transmitter offers remarkable versatility, supporting HART, FOUNDATION Fieldbus, or PROFIBUS protocols for diverse applications.
Flexible Mounting Options:Benefit from flexible installation with head, field, or rail mounting options and a variety of enclosure choices to suit your needs.
Easy Configuration with LOI:Streamline configuration with the LOI option, eliminating the need for special tools like field communicators for straightforward usage.
Transmitter-Sensor Matching:Enhance measurement precision with transmitter-sensor matching using Callendar-Van Dusen constants, minimizing total measurement error.
Hot Backup and Sensor Drift Alerts:Ensure reliable measurement integrity with Hot Backup capability and sensor drift alerts, especially when using dual sensors.
Thermocouple Health Monitoring:Maintain thermocouple reliability through proactive degradation diagnostics, detecting issues before failure occurs.
Temperature Extremes Tracking:Efficiently track temperature extremes with minimum and maximum monitoring, simplifying troubleshooting and optimizing performance.
Simplified Configuration with Dashboards:Leverage device dashboards for an intuitive interface, facilitating easy device configuration and effective diagnostic troubleshooting.
Dimension
Rosemount 644 Field Mount

Rosemount 644H (DIN A Head Mount)

Company Profile
Cold Valley Intelligent Technology (Shanghai) Co., Ltd. proudly stands as a distinguished member of the Hanshan (Cold Mountain) Intelligent Technology Co. family; a name synonymous with innovation and excellence.
Hanshan Intelligent Technology Co., Ltd. group was officially launched in the vibrant city of Shanghai in 2013; marking the beginning of a journey towards technological advancement.
Our founding team, comprised of visionaries from elite international automation firms, brings unparalleled expertise with over 20 years in the automation industry, along with a decade of experience in consulting and implementing cutting-edge digital solutions. We are committed to delivering top-tier automation and digitization products and services to our esteemed global clientele from our headquarters in Shanghai, China.
With more than two decades of profound engagement in the petrochemical sector, Cold Valley Intelligent Technology boasts a deep-seated understanding of the comprehensive automation and digitalization needs of enterprises across the upstream, midstream, and downstream sectors. We offer expert products, solutions, and full life cycle services tailored for industries like petroleum, chemicals, electric power, biomedicine, APIs, food and beverage, liquor, metallurgy, and non-ferrous metals.






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A: As soon as we receive your inquiry, our team will furnish you with an extensive technical document. This document will assist you in confirming the precise process parameters and technical specifications needed. Tailored to your unique requirements, we will then suggest the ideal model that perfectly aligns with your expectations.
I would like a confirmed model. Can you provide that?
A: Absolutely. Upon receiving the model you need, we will conduct a thorough verification to ensure its suitability. If needed, we are pleased to offer additional cost-effective optimization recommendations. Once confirmed, we can efficiently advance to a formal quotation.