ABB SensyMaster FMT430 - 3 Design and Function; Overview; Sensor

22 SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B
3 Design and function
Overview
Sensor
Integral mount design
Remote mount design
Figure 5: Sensor FMT430, FMT450 (example)
Model
FMT430
FMT450
Design
Integral mount design, remote mount design; transmitter optionally in single
-compartment housing 1 or dual-
compartment housing
2
Measuring media
Gas and gas mixtures with known composition, see table Available gas types on page 97
Measuring accuracy for gases*
Air
±1.2
% of Qm in range of 10 to 100 % of the measuring
range;
±0.12
% of the Q
max
DN possible at the nominal diameter
in the range of 0
to 10 % of the measuring range
±0.6 % of the measured value,
±
0.05% of the Q
max
DN possible in the nominal diameter
Oth
er gases
(optional process gas calibration)
—
±1.6
% of the measured value, ±0.1 % of the Q
max
DN
possible in the nominal diameter
Extended measuring range
Yes, optional
Yes, optional
Measuring medium temperature T
medium
Standard and
explosion-proof design:
−20 to 150 °C (−4 to 302 °F)
Standard and explosion
-proof design:
−20 to 150 °C (−4 to 302 °F)
High temperature design:
−20
to 300 °C (−4 to 572 °F)
High temperature design:
−20
to 300 °C (−4 to 572 °F)
DVGW Design**:
0 to 70 °C (32 to 158 °F)
DVGW Design**:
0 to 70 °C (32 to 158 °F)
Ambient temperature T
ambient
Standard: −20
to 70 °C (−4 to 158 °F)
Optional (in preparation): −40
to 70 °C (−40 to 158 °F)
Sensor connection 3
Flange DN 25 – PN 40, threaded connection DIN 11851, compression fitting
Wetted materials
Stainless steel, ceramic sensor element
IP rating
In accordance with EN 60529: IP 65 / IP 67
NEMA rating
In accordance with NEMA
4X
Approvals and certificates
Explosion protection ATEX / IECEx
Zone 0, 1, 2, 21, 22
Explosion protection conforming to cFMus
Class I Div. 1, Class I Div. 2, Zone 1, 2, 21
Additional approvals
Available on our website abb.com/flow or on request
* The stated measuring accuracy only applies under the reference conditions in the stated measuring range.
** Not in connection with explosion-proof design.