Airflow Sensors
AWM90000 Series

DatasheetAirflow Sensors
AWM90000 Series microbridge mass airflow sensors are available in two versions, mass flow and differential pressure.
The AWM92100V has a flow range of ±200 SCCM with a pressure drop of only 0.49 mbar | 49 Pa | 0.007 psi, typically. The
AWM92200V is a differential pressure version that has a range of ±2 inH2O.
The AWM90000 Series sensors have a 1 ms response time, operate with a supply voltage from 8.0 Vdc to 15.0 Vdc, while
consuming only 50 mW of power. The compact plastic package will withstand a maximum overpressure of 1720 mbar |72 kPa | 25 psi without compromising performance. The sensor is well suited for use in portable devices and batterypowered applications.
The AWM90000 Series provides customers with a combination of time-proven reliability, repeatable flow sensing, and theability to customize the sensor functions to meet their specific application needs.

Key Features and Benefits••••

Bi-directional sensing capability: Allows use inMedICAlapplications where bidirectional flow is present•

Continuous Positive Airway Pressure (CPAP) equipmentHighly stable null and full-scale: Does not require•

Sleep apnea monitors

recalibration in most applications•

Oxygen conservers

Low pressure drop: Provides improved system•

Oxygen concentrators

performance•

Nebulizers

Compact package design: Occupies less space in the•Spirometers

customer’s enclosure, potentially reducing production costs;•Potential Applications

enclosure size may also be reduced for easier fit into space-INDUSTRIAL

constrained applications•Variable Air Volume (VAV) damper control

Low hysteresis and repeatability errors (less than•Clogged filter detection

0.35% of reading): Provides improved overall system•

Fuel to air ratio sensing

accuracy•

Leak detection equipment•Fast response time (1 ms typical): Captures full flow event•Low power consumption (50 mW max,): Allows for use inportable devices and battery-powered applications

HIGHLY STABLE • Low PRESSURE DROP • FAST RESPONSE TIME
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Airflow Sensors, AWM90000 Series
Table 1. Specifications

Parameter
AWM92100V

AWM92200V

Typemass flow

differential

Flow range±200 SCCM——±5 mbar | ± 500 Pa | ±2.0 inH2O

Characteristic

Pressure range
Excitation voltage3

8.0 Vdc min./10 Vdc ±0.01 Vdc typ./15 Vdc max.

Power consumption

50 mW max.

Calibration gasair

Null voltage shift1:
Null voltage (25 °C [77 °F])

0 mV ±15 mV

0 mV ±15 mV

Null output shift:-25 °C to 85 °C [-13 °F to 185 °F]±2 mV typ.

—-20 °C to 80 °C [-4 °F to 176 °F]—±1 mV max.

-25 °C to -25 °C [-13 °F to 77 °F]-3.0 %FSS typ.

25 %reading max.

25 °C to 85 °C [77 °F to 185 °F]±1.0 %FSS typ.

30 %reading max.

77 mV ±32 mV

45 mV ±25 mV

Full scale output shift2:

Full scale output
Ratiometricity error3
Repeatability and hysteresis
Response time
Pressure drop at full scale
Overpressure±0.30 %reading typ.
4±0.35 %FSS typ.

±0.1 %reading typ.

1 ms typ.

3 ms typ.

0.49 mbar | 49 Pa | 0.007 psi, typ.

—1720 mbar | 172 kPa | 25 psi max.

Temperature range:
operating-25 °C to 85 °C [-13 °F to 185 °F]-25 °C to 80 °C [-13 °F to 176 °F]

storage-40 °C to 90 °C [-40 °F to 194 °F]-40 °C to 90 °C [-40 °F to 194 °F]

Vibration

20 g, 10 Hz to 2000 Hz

Shock

100 g, 6 ms

Weight5,6 g [0.20 oz]

Assumes low TCR bridge resistance used (pins 2 and 8).
Requires recommended RC value of 1 kOhm to be used (pins 3 though 7) and typical heater control circuit. Maximum current RH.
3Output voltage is ratiometric to supply voltage.
4
Repeatability and hysteresis tolerances reflect inherent inaccuracies of the measurement equimpment.
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Airflow Sensors, AWM90000 Series
Table 2. AWM92100V Flow Specifications
Pressure Drop

Flow(SCCM)

Tolerance, min.
(mV)

Nominal, typ.
(Vdc)

Tolerance, typ.
(mV)(mbar)(Pa)(inH20)

200

45

77

109

0.148

14.7750.0593

150

45

68

109

0.103

10.271

0.0412

100

45

56

109

0.063

6.299

0.0253

50

45

36

109

0.028

2.814

0.0113

0

45

0

109

0.000

0.000

0.0000

-50

45

-37

109

-0.028-2.775-0.0111

-100

45-57

109-0.063-6.293-0.0253

-150

45-69

109

-0.103-10.271-0.0412-20045-78

109-0.148-14.834-0.0596

Table 3. AWM92200V Differential Pressure Specifications
Flow(inH 2 0)

Tolerance, min.
(mV)

Nominal, typ.
(mV)

Tolerance, max.
(mV)

2.0

2238

77

1.5

1832

66

1.0

12

23

49

0.5

71229

0.0

-20

0

20

-0.5

-7-12-30-1.0-12-23-51-1.5-18-32-68-2.0-22-39-79

LAMINAR FLOW
Due to the fast response time of the sensor, the specifications in this datasheet were generated using laminar flow. Airflow instability or“turbulence” present in the airstream will result in an increase in measurement uncertainty. Turbulent flow may be corrected by either ofthe following two methods:• Straightening the airflow by using flow laminarizing.
• Slowing the response of the sensor by using a simple RC time constant on the output of the sensor. (This will slow down the sensor		 response time.
The values needed depend on the amount of turbulence present in the application. A technique for laminarizing the flow includes adding
the following laminar flow elements to the flow stream:• Hex-shaped honeycombs• Foam• Screen materials• Constrictors (frits)
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.
Ensure sharp radii are avoided in any test fixture.

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Airflow Sensors, AWM90000 Series
Figure 1. Performance Characteristics (at 10.0 ±0.01 Vdc at 25 °C [77 °F])

AWM92100V Typical Output Voltage vs FlowVout (mV)

100806040200-20-40-60-80-100-200 -150 -100-50050100150200

1.0

1.5

2.0

Flow (SCCM)

Vout (mV)

AWM92200V Typical Output Voltage vs Pressure

50.0
40.0
30.0
20.0
10.0
0.0
-10.0
-20.0
-30.0
-40.0
-50.0

-2.0

-1.5

-1.0

-0.5 0.0 0.5
Pressure (inH20)

Figure 2. Wiring Diagrams

Sensor bridge circuit
The customer-supplied resistors affectnull output voltage; output is measured
differentially from Pin 8 to PIn 2.
10 Vdc624.9 kOhm
customersupplied
matchedresistors

24.9 kOhmcustomersupplied
matchedresistors
82

Suggested heater control circuitry

Used with heater control circuit
The customer-supplied resistor affects
temperature compensation and spanvoltage.

Rb1 kOhmcustomersupplied
resistor

Ra75Rh

35 kOhm
Pin 6
182 kOhm
Pin 5
LM124
Pin 7+Pin 4Rr

110 Vdc

4
3.3 kOhmcustomer-supplied
resistor

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Airflow Sensors, AWM90000 Series
Figure 3. Mounting Dimensions (For reference only: mm/[in].)

AWM92100V, AWM92200V
2X

5,3[0.210]
2X 1,27[0.050]

1 2 3 4 5 6 7 82,54[0.10]

8X 0,51[0.020]
7X 2,54[0.10]

8X 3,05[0.12]

8X

0,0254[0.010]15,757[0.620]17,02 Typ.
[0.67]

1,02[0.040]32,26 Typ.
[1.27]
25,4[1.100]1,143[0.045]2X

4,70[0.185]

2X
2X

3,81
[0.150]1,17[0.046]13,30[0.520]10,41[0.41]

19,30[0.76]
30,48[1.200]

Table 4. Order Guide

6Catalog Listing

Description

AWM92100V

AWM90000 series amplified airflow sensor, ±200 SCCM flow range

AWM92200V

AWM90000 series amplified airflow sensor, ±2.0 inH20 pressure range

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12,57[0.495]2,80[0.110]ADDITIONAL INFORMATION
The following associated literature is available at sensing.honeywell.com:• Airflow Products Line Guide• Airflow, Force and Pressure Sensors Range Guide• Product Installation Instructions

WARNINGPERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the productcould result in personal injury.
Failure to comply with these instructions could result indeath or serious injury.

WARNINGMISUSE OF DOCUMENTATION••

The information presented in this product sheet is forreference only. Do not use this document as a productinstallation guide.
Complete installation, operation, and maintenanceinformation is provided in the instructions supplied with eachproduct.

Failure to comply with these instructions could result indeath or serious injury.

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representatives and distributors. For
application assistance, current
specifications, pricing or name of thenearest Authorized Distributor, contact
your local sales office or email us at
info.sc@honeywell.com. Visit us on
the Web at sensing.honeywell.com
Phone and Fax:
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WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship. Honeywell’s standard
product warranty applies unless agreed to otherwise by Honeywellin writing; please refer to your order acknowledgement or consult
your local sales office for specific warranty details. If warranted
goods are returned to Honeywell during the period of coverage,
Honeywell will repair or replace, at its option, without charge
those items it finds defective. The foregoing is buyer’s sole
remedy and is in lieu of all other warranties, expressed orimplied, including those of merchantability and fitness fora particular purpose. In no event shall Honeywell be liablefor consequential, special, or indirect damages.
While we provide application assistance personally, through ourliterature and the Honeywell website, it is up to the customer todetermine the suitability of the product in the application.
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this printing.
However, we assume no responsibility for its use.

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October 2014
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