Rosemount 644 Head mounted and Rail mounted Temperature Transmitter

The most ideal temperature transmitter for single point temperature measurement.

The Rosemount 644 provides a flexible and reliable solution for any temperature measurement. The Rosemount 644 is a high-precision transmitter. It supports HART, FOUNDATION fieldbus, or PROFIBUS PA communication protocols and offers two installation forms: head mounted and rail mounted. It is specifically designed to meet your most demanding applications. LCD display can display local measurement readings and has transmitter sensor matching function, which can achieve unparalleled accuracy in the measurement of transmitters and RTDs

Transmitter sensor matching can increase system accuracy by up to 75%

LCD measuring instrument provides convenient process and diagnostic readings

Provide 2-year stability for head mounted and rail mounted applications

Provide various housing options, including polished stainless steel housings for biotechnology pharmaceuticals and other sanitary applications

We can provide a comprehensive single point measurement solution that can be installed at any time, including various sensors, thermocouple sleeves, and enclosures

Powerful EMC performance provides reliable measurements - compliant with NAMUR NE 21 standards

Customize alarms and threshold values

Can provide head mounted and rail mounted forms

Hardware alarm switch

Provide multi-point installation for HART control system

Standard functional blocks: 2 analog inputs, 1 PID, and 1 backup link activity scheduler (LAS)

Adjusting control kit 1 PID can generate valuable and flexible control strategies.

Fieldbus installation certified by FISCO

Can provide PlantWeb alarms

18 bit analog-to-digital converter with environmental temperature compensation improves performance and process quality

符合 Profibus PA Profile 3.02

Standard functional blocks: 1 physical module, 1 sensor, and 1 analog input

Factory configuration with customizable address

Standard and FISCO certification for Profibus installation

numerical precision

+0.15 ° C (+0.27 ° F), suitable for Pt100 RTD

D/A 精度

+0.03% range

Environmental temperature impact

For every 1.0 ° C (1.8 ° F) change in the surrounding environment, the Pt100 RTD temperature changes by ± 0.006 ° C/° C

stability

0.15% reading, or 0.15 ° C for 2 years

input

2. 3 and 4-wire RTD, thermocouple, millivolt, ohm

power supply voltage

12-42.2V under HART protocol

form

DIN A head mounted or rail mounted installation

numerical precision

+0.15 ° C (+0.27 ° F), suitable for Pt100 RTD

Environmental temperature impact

For every 1.0 ° C (1.8 ° F) change in the surrounding environment, the Pt100 RTD temperature changes by ± 0.006 ° C/° C

stability

0.15% reading, or 0.15 ° C for 2 years

input

2. 3 and 4-wire RTD, thermocouple, millivolt, ohm

power supply voltage

9-32V input fieldbus protocol

form

Head installation

numerical precision

+0.15 ° C (+0.27 ° F), suitable for Pt100 RTD

Environmental temperature impact

For every 1.0 ° C (1.8 ° F) change in the surrounding environment, the Pt100 RTD temperature changes by ± 0.006 ° C/° C

stability

0.15% reading, or 0.15 ° C for 2 years

input

2. 3 and 4-wire RTD, thermocouple, millivolt, ohm

power supply voltage

9-32V input fieldbus protocol

form

Head installation