60 mW Power Consumption Compensated Airflow Sensor AWM720P1 Precise Ratiometricity and Compact Design

                                                                 Compensated Airflow Sensor AWM720P1

AWM700 Series Airflow Sensors Description
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 inH2O.

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.

AWM700 Series Airflow Sensors Key Features and Benefits
• 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

AWM700 Series Airflow Sensors Potential Applications
MEDICAL
• Oxygen concentrators and conservers
• Respirators and ventilators
• Nebulizers
• Continuous positive airway pressure (CPAP)
• Anesthesia machines
INDUSTRIAL
• Mass flow controllers
• Telecommunication systems
• Environmental climate controls
• Fuel cell controls
• Process gas control welding equipment and lasers

AWM700 Series Airflow Sensors Specifications

Characteristic	Parameter
	AWM720P1	AWM730B5
Flow range	+200 SLPM	±300 SLPM
Excitation voltage	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]	-2.0 Vdc %reading typ. +2.0 Vdc %reading typ. — —	— — ±2.5 %reading typ. ±2.5 %reading typ.
Ratiometricity error	±0.30 %reading typ.	—
Repeatability and hysteresis	±0.50 %reading max.	±0.035 Vdc typ.
Response time	6 ms typ.	10 ms typ.
Warmup time	—	5 s
Pressure drop at full scale	2,5 mbar | 250 Pa | 1.0 inH20 typ.	3,0 mbar | 300 Pa | 1.2 inH20 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