Engineered for versatility, the Rosemount 644 Temperature Transmitter is available with HART™, FOUNDATION™ Fieldbus or PROFIBUS™ protocols in head, field or rail mount styles and a variety of enclosure options. By adding a Local Operator Interface (LOI), you can update your transmitter configuration in the field without tools. For diverse application requirements, this transmitter includes diagnostic capabilities, such as Hot Backup™ capability, sensor drift alert and thermocouple degradation.
Rosemount™ 644 Temperature Transmitter
$300.00
The Rosemount 644 Temperature Transmitter provides accurate and reliable temperature measurement for industrial processes. Featuring HART communication protocol and durable construction, it ensures stable performance in demanding environments. With easy configuration and installation, this versatile transmitter supports various sensor types, making it suitable for numerous applications across different industries.
| Input | Dual and single sensor capability with universal sensor inputs (RTD, T/C, mV, ohms) |
|---|---|
| Output Signal | 4-20 mA /HART™ protocol, FOUNDATION™ fieldbus protocol, PROFIBUS™ PA protocol |
| Housing | Field mount, DIN A head mount or rail mount |
| Display/Interface | LCD Display, LCD Display with Local Operator Interface (LOI), or LED |
| Diagnostics | Basic diagnostics, Hot Backup™ capability, sensor drift alert, thermocouple degradation, min/max tracking |
| Calibration Options | Transmitter-sensor matching (Callendar-Van Dusen constants), 5-point calibration |
| Certifications/Approvals | SIL 2/3 certified to IEC 61508 by an independent 3rd party, hazardous location, marine type, see full specs for complete list of certifications |













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