Mass Airflow Sensors
AWM720P1 Airflow
AWM700 Series
www.honeywell.com/sensing Honeywell • Sensing and Control 3
Voltage Output vs. Flow
0.00
0
1.000
2.000
3.000
4.000
5.000
6.000
0 25 50 75 100 125 150 175 200
Airflow (SLPM)
Vo
(Vdc)
Pressure Drop vs. Flow
0.000
0.200
0.400
0.600
0.800
1.000
1.200
02550
75
100 125 150 175 200
Airflow (SLPM)
Pressure
(inch H
2
O)
Figure 1. Voltage Output vs. Airflow Figure 2. Pressure Drop vs. Airflow
OUTPUT CURVES
Figure 1, Voltage Output vs. Airflow and Figure 2,
Pressure Drop vs. Airflow depict performance
characteristics for the AWM700 Series sensors at
10.0 ±0.01 Vdc at 25ºC.
NOTICE
LAMINAR FLOW
Due to the fast response time of the sensor, these
specifications were generated using laminar flow.
Airflow instability or “turbulence” present in the
airstream will result in an increase in measurement
uncertainty.
The turbulent flow problem can be corrected by either
straightening the airflow using flow laminarizing or by
slowing the response of the sensor using a simple RC
time constant on the output of the sensor. This, of
course, slows down the sensor response time. The
values needed depend on the amount of turbulence
present in the application.
Several techniques for laminarizing the flow include
adding hex shaped honeycombs, foam, screen
materials or adding constrictors (frits) to the flow
stream. There are various commercial laminar flow
elements that can be purchased. Unfortunately the
greater the efficiency of the laminarizer, the greater
the increase in pressure drop in order to establish a
given flow rate. Plastic honeycomb material probably
gives the most improvement for the least pressure
drop. In any test fixture, the avoidance of sharp radii is
an absolute requirement.
Failure to comply with these application
instructions may result in product failures.
ELECTRICAL CONNECTION
The AWM700 Series accepts a latch detent
connector, such as: AMP part number 103956-3.
Information on latch detent connectors is available
from the AMP Product Information Center, 1-800-
522-6752 or the AMP Customer Hotline,
1-800-722-1111.
RELATED AMP LITERATURE
82160 MTE Interconnection System
(AMPMODU) Catalog
108-25034 Product Specification
(technical performance information)
114-25026 Application Specification
(describes product, proper assembly,
full tooling information)
IS 6919 Instruction Sheet for assembly
procedure
MAKING ELECTRICAL CONNECTIONS
1. Remove (unlatch) the connector from the
AWM700.
2. Hand-crimp the interface wire to the appropriate
pin on the connector. One possible tool: AMP
Hand-Crimp Tool, part number 58342-1.
3. Insert the terminal contacts into the connector
housing after carrier strip (lead-frame) is
removed.
4. Reconnect (latch) connector to AWM700 device.
MOUNTING INSTRUCTIONS
Mount AWM700 Series sensors with 6-32 screws.
Honeywell recommends use of washers below
screw head. Mounting torque is 0.68 N m [6.0 in lb]
max.
