Datasheet
Airow Sensors
AWM700 Series, Compensated/Amplified
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Airflow Sensors
The AWM700 Series, Compensated/Amplified Airflow Sensors provide in-line flow measurement with a specially designed
bypass flow housing. These sensors measure flow as high as 300 standard liters per minute (SLPM) while inducing a
typical pressure drop of 1 inH
2
O.
The AWM700 has a high flow range capability in a small package, as well as a 6 ms response time. These sensors require
a 10 Vdc supply, but consume only 60 mW of power.
The compact plastic package withstands overpressures of 1720 mbar | 172 kPa |
25 psi without compromising
performance. The snap-in AMP-compatible connector provides reliable connection.
The AWM700 Series provides a combination of time-proven reliability, high accuracy, and precision operating
characteristics. This inherent accuracy over life reduces need for recalibration. AWM700 sensor circuitry performs
amplification and temperature compensation.
The AWM720P1 and AWM730B5 were developed primarily for the medical ventilation market and meet the high
performance requirements of many medical and analytical instrumentation applications.
HIGHly STABle • COMPACT PACKAGe • lOW HySTeReSIS
Key Features and Benets
• Flow tubes for ranges up to 300 SLPM: Provides low
pressure drop in the customer’s application
• Highly stable null and full scale: Does not require
recalibration in most applications
• Compact package design: Occupies less space in the
customer’s enclosure, potentially reducing production costs;
enclosure size may also be reduced for easier fit into space-
constrained applications
• Low hysteresis and repeatability errors (less than
0.35% of reading): Provides better system accuracy
• Enhanced response flow time of 6 ms: Captures full flow
event
• Low power consumption: Allows for use in portable
devices and battery-powered applications
Potential Applications
MEDICAL
• Oxygenconcentratorsandconservers
• Respiratorsandventilators
• Nebulizers
• Continuouspositiveairwaypressure(CPAP)
• Anesthesiamachines
INDUSTRIAL
• Massowcontrollers
• Telecommunicationsystems
• Environmentalclimatecontrols
• Fuelcellcontrols
• Processgascontrolweldingequipmentandlasers
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AWM700 Series, Compensated/Amplified
Table 1. Specifications
Characteristic
Parameter
AWM720P1 AWM730B5
Flow range +200 SLPM ±300 SLPM
Excitationvoltage
1
10 Vdc ±0.01 Vdc 5 Vdc ±0.01 Vdc
Power supply 8.0Vdcmin./10.0Vdctyp./15.0Vdcmax. 9.0Vdcmin./16.0Vdcmax.
Power consumption 60 mW
Output loading:
sinking
sourcing
10 mA typ.
20 mA typ.
Calibration gas air
Nullvoltageshift:
25 °C to -25 °C [77 °F to -13 °F]
25 °C to 85 °C [77 °F to 185 °F]
25 °C to 5 °C [77 °F to 41 °F]
25 °C to 60 °C [77 °F to 140 °F]
±0.025 Vdc typ.
±0.025 Vdc typ.
—
—
—
—
±0.02 Vdc typ.
±0.02 Vdc typ.
Full scale output shift:
25 °C to 10 °C [77 °F to 50 °F]
25 °C to 40 °C [77 °F to 104 °F]
25 °C to 5 °C [77 °F to 41 °F]
25 °C to 60 °C [77 °F to 140 °F]
-2.0 Vdc %reading typ.
+2.0 Vdc %reading typ.
—
—
—
—
±2.5 %reading typ.
±2.5 %reading typ.
Ratiometricityerror
1
±0.30 %reading typ. —
Repeatabilityandhysteresis
2
±0.50%readingmax. ±0.035 Vdc typ.
Responsetime
3
6 ms typ. 10 ms typ.
Warmup time — 5 s
Pressure drop at full scale 2,5 mbar | 250 Pa | 1.0 inH
2
0 typ. 3,0 mbar | 300 Pa | 1.2 inH
2
0 typ.
Overpressure 1720 mbar | 172 kPa|25psimax. 1034 mbar | 103 kPa|15psimax.
Temperature range:
operating
storage
-25 °C to 85 °C [-13 °F to 185 °F]
-40 °C to 90 °C [-40 °F to 194 °F]
5 °C to 60 °C [41 °F to 140 °F]
-40 °C to 90 °C [-40 °F to 194 °F]
Orientation sensitivity —
<0.005Vdctyp.variationat5Vdcexcitation
between any two directions
Weight 34 g [1.20 oz] 23,2 g [0.75 oz]
Connector snap-in AMP 103956-3 provided with sensor
1
Output voltage is ratiometric to supply voltage.
2
Repeatabilityandhysteresistolerancesreflectinherentinaccuraciesofthemeasurementequipment.
3
Responsetimesarefrom10%to90%.