Honeywell Airflow Sensors line Guide

Go with the flow of engineering leadership. All airflow sensorsoperate on heat transfer

— flow and differential pressure.

But Honeywell Sensing and Control (S&C) offers advanced chip design, manufacturing

 techniques and microstructure technology, allowing our microbridge to be notably faster,

smaller and more sensitive. Our silicon chip design is created from a thin film, thermally

isolated bridge structure, containing both heater and temperature sensing elements.

This provides rapid response to the air or gas flow and amount and direction, delivering

a proportional output voltage. Amplified versions provide an enhanced output signal

and less external circuitry, while unamplified versions allow additional external circuit

options.

What’s more, a variety of port styles provides greater application flexibility.

FEATURES

HonEywEll ZEpHyR™ AiRFlow SEnSoRS

HAF Series-High Accuracy.

±50 SCCM to ±750 SCCM

Features: Total Error Band (TEB) as low as±0.25 %FSS • Fast response time

• Wide range of airflows • Customizable flow ranges and configurable package

styles • Full calibration and temperature compensation • High sensitivity at very

low flows • Linear output • High stability • Low pressure drop • High 12-bit

resolution (digital), 0.039 %FS resolution (analog) • Low 3.3 Vdc operating

voltage • ASIC-based I2C output compatibility (digital)

• Insensitivity to mounting orientation • Insensitivity to altitude • Small size

• RoHS-compliant materials 

Benefits: 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. 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 (digital) increases

ability to sense small airflow changes, allowing customers to more precisely control

their application; 0.039 %FS resolution (analog) 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 the 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.

Designed for use in medical equipment such as anesthesia delivery machines,

ventricular assist devices (heart pumps), hospital diagnostics (spectrometry, gas

chromatography), nebulizers, oxygen concentrators, patient monitoring systems.