Rosemount 644 Temperature Transmitter
2. Output signal 4-20 mA /HART™ protocol, FOUNDATION™ fieldbus protocol, PROFIBUS™ PA protocol
3. Housing field mount, DIN A head mount or rail mount
4. Display/Interface LCD display with Local Operator Interface (LOI) LCD display
5. Diagnostics Basic diagnostics, Hot Backup™ function, sensor drift warning, thermocouple aging, min/Max tracking
6. Calibration option transducer-sensor matching (Callender-Van. Doussen constant), 5- point calibration
7. Certification/Certification Independent third party certified to SIL 2/3 according to IEC 61508, hazardous Places, ship type.
Rosemount 644 Temperature Transmitter - Industrial Temperature Measurement Solution
The Rosemount 644 Temperature Transmitter transforms raw sensor signals into stable, accurate outputs for your critical processes. This versatile instrument converts low-level inputs from RTDs, thermocouples, millivolts, and ohms into noise-immune signals like 4-20 mA/HART, FOUNDATION™ Fieldbus, or PROFIBUS® PA. With its dual-sensor capability and advanced diagnostics, you can eliminate costly downtime while ensuring measurement accuracy in the harshest conditions.

Key Features and Specifications
1. Inputs Support universal sensor inputs (RTD, T/C, mV, ohms) for single or dual sensor assemblies
2. Output signal 4-20 mA /HART™ protocol, FOUNDATION™ fieldbus protocol, PROFIBUS™ PA protocol
3. Housing field mount, DIN A head mount or rail mount
4. Display/Interface LCD display with Local Operator Interface (LOI) LCD display
5. Diagnostics Basic diagnostics, Hot Backup™ function, sensor drift warning, thermocouple aging, min/Max tracking
6. Calibration option transducer-sensor matching (Callender-Van. Doussen constant), 5- point calibration
7. Certification/Certification Independent third party certified to SIL 2/3 according to IEC 61508, hazardous Places, ship type.
Comprehensive Support and Service
24-Hour Response Guarantee
Technical questions don't wait for business hours. Our expert team provides round-the-clock support when you need it most.
12-Month Warranty Protection
Your investment stays protected with comprehensive warranty coverage. We stand behind the quality of every instrument we supply.
Complete Installation Support
Receive detailed installation documentation plus video guidance within 12 hours when needed. Our technical team helps ensure proper commissioning for optimal performance.
Customization Capabilities
We are a professional rosemount 644 Temperature Transmitter manufacturer
Every application has unique requirements. Our ODM/OEM services adapt the device specifications to match your specific country regulations and operational needs.

Contact Us
Ready to improve your temperature measurement accuracy and reliability? The Rosemount 644 Temperature Transmitter delivers the performance you need with the support you deserve.
Contact our technical specialists at info@winlinklab.com for detailed specifications, pricing, or application assistance. We'll help you select the right configuration for your specific requirements and ensure successful implementation in your processes.
Your temperature measurement challenges deserve professional solutions. Let us show you how the right transmitter makes all the difference in your operations.
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