Product Details

Product Description

644 temperature transmitters

Highly accurate head and rail mount temperature transmitter

The 644 temperature transmitter is designed for use in control applications where the loss of the temperature points may be detrimental. These highly accurate 644 temperature transmitters are available in a variety of mounting styles, field housings, and communication protocols to meet your demanding installation requirements.

2.Technical Parameter

Accuracy	+ 0.15° C (+0.27° F) for Pt100 RTD (optional 0.10° C (+0.18° F))
D/A Accuracy	+0.03% of span
Ambient Temperature Effects	0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD)
Stability	.15% of Reading or .15°C for 2 years (optional 0.25% or 0.25°C 5 yr)
Inputs	2 x 2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm
Supply Voltage	12 - 42.2V in HART Protocol (Selectable HART revisions 5 and 7)
Form Factor	DIN A Head Mount
Accuracy	+ 0.15° C (+0.27° F) for Pt100 RTD
D/A Accuracy	+0.03% of span
Ambient Temperature Effects	0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD)
Stability	0.15% of Reading or .15°C for 2 years
Inputs	1 x 2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm
Supply Voltage	12 - 42.2V in HART Protocol
Form Factor	Rail mount
Accuracy	+ 0.15° C (+0.27° F) for Pt100 RTD
Ambient Temperature Effects	0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD)
Stability	.15% of Reading or .15°C for 2 years
Inputs	1 x 2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm
Supply Voltage	9 - 32V in FOUNDATION Fieldbus Protocol
Form Factor	DIN A Head Mount
Accuracy	+ 0.15° C (+0.27° F) for Pt100 RTD
Ambient Temperature Effects	0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD)
Stability	.15% of Reading or .15°C for 2 years
Inputs	1 x 2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm
Supply Voltage	9 - 32V in Profibus PA Protocol
Form Factor	DIN A Head Mount

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