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Rosemount 644 Temperature Transmitter

 
Versatile temperature transmitter with HART, FOUNDATION Fieldbus or PROFIBUS protocols, available in configurations including head, field, or rail mount.​
 
Advanced Diagnostics
Avoid shutdowns due to temperature sensor failure with Advanced Diagnostics.
Flexible Design
Meet your application requirements through multiple transmitter housing options with standard communication protocols
Local Operator Interface (LOI)
Easily update your transmitter configuration in the field with no tools
Specifications and Features
Reliable Field Solution
Versatile temperature transmitter delivers field reliability and advanced features to meet demanding process needs
Communication protocols: HART®, FOUNDATION™ Fieldbus or PROFIBUS® PA
Stability: 5 years
Limited warranty: 5 years
Digital accuracy: ±0.10°C (±0.18°F) for Pt100 RTD
Safety certified to IEC 61508 with Systematic Capability up to SIL 3
Rosemount 644 complete specifications
Customizable Transmitter Design
Get the most of your transmitter by customizing it to your needs.
Variety of enclosure options to meet your application requirements
Add a display to get valuable process information
Accepts universal sensor inputs: RTDs, T/C, mV and ohm
Additional diagnostics options available such as

Dual Sensor Input

,

Hot Backup

,

Sensor Drift

, and more
LCD Display and Local Operator Interface (LOI)
Display measurement and diagnostic information in the field. Built-in configuration capability replaces expensive training and tools.
Factory assembled to sensor and thermowell
Transmitter configured with sensor information
Calibrated with equipment traceable to NIST standards
Password protection to prevent unauthorized changes
Do More with Rosemount Temperature Solutions
Save installation time and cost when ordering a transmitter with a Rosemount Sensor and Thermowell.
Factory assembled to sensor and thermowell
Transmitter configured with sensor information
Calibrated with equipment traceable to NIST standards
Choose a Sensor and Thermowell to complete your Rosemount 644 temperature solution.
​​​​​​​​​​​​​​​​​​​​​​
A Higher Level in Process Control
The Rosemount 3144P Temperature Transmitter takes you to a higher level in process control by offering:
Comprehensive diagnostics capabilities that alert you to issues in your temperature loop
Dual-compartment housing provides a robust solution that protects and isolates electronics from environmental exposure and EMI
Calibrated with equipment traceable to NIST standards
Learn more about the Rosemount 3144P Temperature Transmitter available with HART or FOUNDATION Fieldbus protocols.
 
DocumentationFeatures & BenefitsSpecificationsApplicationsAssociated Products
 Approvals & Certificates
 Product Certificates & Approvals
  FMEDA Report: 644 HART Temperature Transmitter with option code QT, Device Label SW Rev 1.1.X
275 KBpdfMay 20121.0
English
 644_Методика_поверки
Emerson Process Management
446 KBpdf
English
 644_Свидетельство_об_утверждении_типа_СИ
Emerson Process Management
2 MBpdf
English
 644_Сертификат_соответствия_ТС
Emerson Process Management
2 MBpdf
English
 644_Сертификат_соответствия_ТС_Ех
Emerson Process Management
2 MBpdf
English
 Declaration of Conformity: Rosemount 644 Smart Temperature Transmitter (Hart & Fieldbus)
2 MBpdfJuly 2015P
English
 FMEDA Certificate: 644 4-20mA / HART Temperature Transmitter
80 KBpdfJanuary 20151.5
English
 FMEDA Report: 644 4-20mA / HART Temperature Transmitter Device Label SW REV 1.1.x
179 KBpdfSeptember 20121.1
English
 FMEDA Report: 644 HART Temperature Transmitter, Revision R3.0
300 KBpdfJune 20052.3
English
 Product & Service Documentation
 Brochures
 Brochure: Rosemount Instrumentation for Life Sciences
3 MBpdfDecember 2008AA
English
 Product Flyer: Rosemount Model 644H - Temperature Transmitter with Sanitary Housing
6 MBpdfNovember 2002AA
English
 Data Sheets - Bulletins - Catalogs
 Configuration Data Sheet: Rosemount 644 HART Headmount
585 KBpdfMarch 2016EA
English
 Configuration Data Sheet: Rosemount 644 with PROFIBUS Protocol
464 KBpdfMarch 2016BA
English
 Configuration Data Sheet: Rosemount 644H and 644R Smart Head and Rail Mount Temperature Transmitters
109 KBpdfAugust 2004LA
English
 Product Data Sheet: Rosemount 644 Temperature Transmitter
3 MBpdf
English
 Drawings & Schematics
 Type 1 Drawing: Rosemount 644R Temperature Transmitter, 2D DXF
96 KBzipFebruary 2013AC
English
 Type 1 Drawing: Rosemount 644R Temperature Transmitter, 2D PDF
137 KBpdfFebruary 2013AC
English
 Type 1 Drawing: Rosemount 644R Temperature Transmitter, 3D PDF
545 KBpdfFebruary 2013AC
English
 Type 1 Drawing: Rosemount 644R Temperature Transmitter, 3D SAT
956 KBzipFebruary 2013AC
English
 Type 1 Drawing: Rosemount 644R Temperature Transmitter, 3D STP
714 KBzipFebruary 2013AC
English
 Manuals & Guides
 Manual: Rosemount 644 Temperature Transmitter with HART® Protocol
6 MBpdf
English
 Manual: Rosemount 644 Temperature Transmitter with HART® Protocol (Shipped Sept 2012 and later)
9 MBpdfApril 2015RA
English
 Manual: Rosemount 644 Temperature Transmitter with PROFIBUS PA
2 MBpdfJanuary 2011AA
English
 Quick Start Guide: Rosemount 644H and 644R Smart Temperature Transmitters
3 MBpdf
English
 Quick Start Guide: Rosemount 644H Profibus PA Temperature Transmitters
2 MBpdf
English
 Quick Start Guide: Rosemount 644H Temperature Transmitter with 4-20 mA HART (Revision 5 and 7) Protocol
3 MBpdf
English
 Quick Start Guide: Rosemount 644H Temperature Transmitters with Foundation™ Fieldbus
2 MBpdf
English
 Proven Results
 Proven Result: Refinery Eliminates Shutdowns Caused by Lightning
73 KBpdfJune 2006CA
English
 Technical White Papers
 Technical Note: Convert 4-20 mA Output to FOUNDATION Fieldbus Output
96 KBpdfAugust 2012BA
English
 Software Downloads
 Device Drivers
 Rosemount 644 – DD and DTM Files
2 KBhtmJuly 2014
English
 Rosemount 644 Profibus PA – DD File
239 KBzip
English
 Rosemount 644 Profibus PA – GSD File
32 KBzip
English
Rosemount 644 Temperature Transmitter Family
Rosemount 644 Temperature Transmitter Family
Rosemount 644 Temperature Transmitter Family Rosemount 644 Temperature Transmitter Family Rosemount 644  HART Rosemount 644 FOUNDATION Fieldbus Rosemount 644 PROFIBUS PA
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