Rosemount 644 Temperature Transmitter

Our primary transmitter is designed for straightforward updates in the field.

Available in a Rail Mount or DIN A form factor, it supports HART, FOUNDATION Fieldbus, and PROFIBUS® outputs.

Key features include optional transient protection and dual input capabilities, along with an advanced diagnostics suite that offers Hot Backup, sensor drift monitoring, thermocouple degradation alerts, and min/max logging.

With a two-year stability guarantee and an option for SIL 2 certification, it ensures reliable performance. Additionally, it can be equipped with an optional LCD display and LOI push buttons for enhanced usability.