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Overview

Honeywell Zephyr™ digital airflow sensors: HAF Series-high accuracy, bidirectional flow, long port, fastener mount, 0 SCCM to 200 SCCM flow range, digital I²C address: 0x49, 5.0 Vdc supply voltage.

Honeywell Zephyr™ HAF Series sensors provide a digital interface for reading airflow over specified full-scale flow and compensated temperature ranges. The thermally isolated heater and temperature sensing elements help these sensors provide a fast response to air or gas flow.

Zephyr sensors are designed to measure mass flow of air and other non-corrosive gases. Standard flow ranges are available at ±50, ±100, ±200, ±400 or ±750 SCCM. Custom flow ranges are also available. The sensors are fully calibrated and temperature compensated with an onboard Application Specific Integrated Circuit (ASIC).

The HAF Series is compensated over the temperature range of 0 °C to 50 °C [32 °F to 122 °F] and operates across a temperature range of -20 °C to 70 °C [-4 °F to 158 °F]. The state-of-the-art ASIC-based compensation provides digital (I2C) outputs with a response time of 1 ms.

These sensors operate on the heat transfer principle to measure mass airflow. They consist of a microbridge Microelectronic and Microelectromechanical System (MEMS) with temperature-sensitive resistors deposited with thin films of platinum and silicon nitride. The MEMS sensing die is located in a precise and carefully designed airflow channel to provide repeatable response to flow.

Zephyr sensors provide the customer with enhanced reliability, high accuracy, repeatable measurements and the ability to customize sensor options to meet many specific application needs. The combination of rugged housings with a stable substrate makes these products extremely robust. They are designed and manufactured according to ISO 9001 standards.

HAFBLF0200C4AX5 Amplified Airflow Sensors - Honeywell


Technical Specifications

Series Name HAF
Signal Conditioning Amplified
Flow/Pressure Range 0 SCCM to 200 SCCM
Response Time 1 ms typ.
Supply Voltage 5.0 Vdc
Port Style Long
Common Mode Pressure 25 psi max.
Power Consumption 40 mW max.
Operating Temperature -20°C to 70°C [-4°F to 158°F]
Compensated Temperature 0°C to 50°C [32°F to 122°F]
Storage Temperature -40°C to 125°C [-40°F to 251°F]
Media Compatibility Dry gas only
Availability Global
Comment Nitrogen calibration gas
UNSPSC Code 41111931
UNSPSC Commodity 41111931 Flow Sensors

Technical Specifications

Series Name HAF
Signal Conditioning Amplified
Flow/Pressure Range 0 SCCM to 200 SCCM
Response Time 1 ms typ.
Supply Voltage 5.0 Vdc
Port Style Long
Common Mode Pressure 25 psi max.
Power Consumption 40 mW max.
Operating Temperature -20°C to 70°C [-4°F to 158°F]
Compensated Temperature 0°C to 50°C [32°F to 122°F]
Storage Temperature -40°C to 125°C [-40°F to 251°F]
Media Compatibility Dry gas only
Availability Global
Comment Nitrogen calibration gas
UNSPSC Code 41111931
UNSPSC Commodity 41111931 Flow Sensors

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
Honeywell Zephyr™ Digital Airflow Sensors: HAF Series-High Accuracy, ±50 SCCM to ±750 SCCM Installation Instructions Installation Instructions English 517KB
Hospital Applications Brochure English 5MB
LF port housing highres photo Photo -- 1MB
LF port housing lowres photo Photo -- 114KB
Airflow Sensors Line Guide Product Line Guide English 132KB
Airflow, Force, and Pressure Sensors Range Guide Product Range Guide English 9MB
Sensors and Switches for Potential Medical Applications Product Range Guide English 3MB
Honeywell Zephyr™ Airflow Sensors, HAF Series-High Accuracy, ±50 SCCM to ±750 SCCM Product Part Listing/Nomenclature Tree English 81KB
Honeywell Zephyr™ Analog and Digital Airflow Sensors: HAF Series-High Accuracy, ±50 SCCM to ±750 SCCM Application Note English 482KB
Sensors and Switches for Potential Medical Applications Application Note English 374KB
Sensors in Sleep Apnea Machines Application Note English 2MB
Sensors in Ventilators Application Note English 2MB
Gas Media Compatibility & Correction Factors Technical Information English 96KB
Sensors in Anesthesia Machines Application Note English 3MB
Sensors and Switches for HVAC Applications Application Note English 5MB
Airflow Sensor Glossary of Terms Technical Information English 154KB
Mass Airflow Sensors Measuring Low Differential Pressures Altitude and Gas Density Correction Technical Information English 85KB
Mass Flow Sensors: Mass Flow versus Volumetric Flow and Flow Rate Unit Conversions Technical Information English 190KB
Mass Airflow Sensors Particle Contamination and Filter Manufacturers Technical Information English 99KB

Product 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)
  • 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
  • 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: Iincreases 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 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 materiasl: Meet Directive 2002/95/EC

Applications

Medical:

  • Anesthesia delivery machines
  • Ventricular assist devices (heart pumps)
  • Nebulizers
  • Oxygen concentrators
  • Patient monitoring systems (respiratory monitoring)
  • Sleep apnea machines
  • Spirometers
  • Ventilators
  • Laparoscopy

Industrial:

  • Air-to-fuel ratio
  • Fuel cells
  • Gas leak detection
  • VAV system on HVAC systems
  • Gas meters
  • HVAC filters

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