Datasheet

Airflow Sensors AWM5000 Series
High Flow Mass Airflow/Amplified
Honeywell1 Sensing and Control11-800-537-6945 USA1F1-815-235-6847 International11-800-737-3360 Canada 79
In-Line Flow Measurement
AWM5000 Series Microbridge Mass Air-
flow Sensors feature a venturi type flow
housing. They measure flow as high as 20
standard liters per minute (SLPM) while
inducing a maximum pressure drop of
2.25N H
2
O. The microbridge chip is in di-
rect contact with the flow stream, greatly
reducing error possibilities due to orifice
or bypass channel clogging.
Rugged, Versatile Package
The rugged plastic package has been
designed to withstand common mode
pressures up to 50 psi, and the small
sensing element allows 100 gs of shock
without compromising performance. The
included ‘‘AMP’’ compatible connector
provides reliable connection in demand-
ing applications.
On-board Signal Conditioning
Each AWM5000 sensor contains circuitry
which performs amplification, lineariza-
tion, temperature compensation, and gas
calibration. Figure 1 (Heater Control Cir-
cuit) and Figure 2 (Sensor Bridge Circuit
and Amplification Linearization Circuit) il-
lustrate the on-board electrical circuitry
for the AWM5000 Series. A 1 to 5 VDC
linear output is possible for all listings
regardless of flow range (5, 10, 15, or 20
SLPM) or calibration gas (nitrogen, car-
bon dioxide, nitrous oxide, or argon). All
calibration is performed by active laser
trimming.
FEATURES
1 Linear voltage output
1 Venturi design
1 Remote mounting capability
1 Active laser trimming improves inter-
change ability
1 Separate gas calibration types:
– Ar (argon)
– N
2
(nitrogen) or
– CO
2
(carbon dioxide)
Figure 1
Figure 2
Airflow