Honeywell Zephyr™ Digital Airflow Sensors: HAF Series-High Accuracy, bidirectional flow, long port, fastener mount, 0 SCCM to 200 SCCM flow range, digital I?C address: 0x29, 5.0 Vdc supply voltage || HAFBLF0200C2AX3

Features

• Total Error Band (TEB) as low as ±0.25 %FSS allows for precise airflow measurement, often ideal for demanding applications with high accuracy requirements
• Fast response time allows a customer's application to respond quickly to airflow change, important in critical medical (e.g., anesthesia) and industrial (e.g., fume hood) applications
• Wide range of airflows: Zephyr measures mass flow at standard flow ranges of ±50, ±100, ±200, ±400 or ±750 SCCM, or custom flow ranges, increasing the options for integrating the sensor into the application
• Customizable flow ranges and configurable package styles meet specific end-user needs
• Full calibration and temperature compensation typically allow customer to remove additional components associated with signal conditioning from the PCB, reducing PCB size as well as costs often associated with those components (e.g., acquisition, inventory, assembly)
• High sensitivity at very low flows provides for faster response time at the onset or cessation of flow
• Linear output provides a more intuitive sensor signal than the raw output of basic airflow sensors, which can help reduce production costs, design, and implementation time
• High stability reduces errors due to thermal effects and null shift to provide accurate readings over time, often eliminating need for system calibration after PCB mount and periodically over time
• Low pressure drop typically improves patient comfort in medical applications, and reduces noise and system wear on other components such as motors and pumps
• High 12-bit resolution increases ability to sense small airflow changes, allowing customers to more precisely control their application
• Low 3.3 Vdc operating voltage option and low power consumption allow for use in battery-driven and other portable applications
• ASIC-based I²C digital output compatibility eases integration to microprocessors or microcontrollers, reducing PCB complexity and component count
• Insensitivity to mounting orientation allows customer to position sensor in most optimal point in the system, eliminating concern for positional effects
• Insensitivity to altitude eliminates customer-implemented altitude adjustments in the system, easing integration and reducing production costs by not having to purchase additional sensors for altitude adjustments
• Small size occupies less space on PCB, allowing easier fit and potentially reducing production costs, PCB size may also be reduced for easier fit into space-constrained applications
• RoHS-compliant materials meet Directive 2002/95/EC

Potential Applications

Medical:

• Anesthesia delivery machines
• Ventricular assist devices (heart pumps)
• Hospital diagnostics (spectrometry, gas chromatography)
• Nebulizers
• Oxygen concentrators
• Patient monitoring systems (respiratory monitoring)
• Sleep apnea machines
• Spirometers
• Ventilators
• Laparoscopy

Industrial:

• Air-to-fuel ratio
• Analytical instrumentation (spectrometry, chromatography)
• Fuel cells
• Gas leak detection
• VAV system on HVAC systems
• Gas meters
• HVAC filters