Zephyr™ Analog Airflow Sensors

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Honeywell Zephyr™ Analog Airflow Sensors: HAF Series-High Accuracy, provide an analog interface for reading airflow over the specified full scale flow span and temperature range. Their 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. They are available in standard flow ranges and are fully calibrated and temperature compensated with an on-board 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 analog 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 calculated airflow channel to provide repeatable flow response.

Zephyr™ sensors provide customers with enhanced reliability, analog 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.


  • High ±2.5% accuracy allows for very precise airflow measurement
  • Full calibration and temperature compensation
  • Customizable for specific end-user needs
  • High sensitivity at very low flows
  • High stability
  • Low pressure drop
  • Fast response time


  • Medical
  • Industrial
    • air-to-fuel ratio
    • Analytical instrumentation
    • Fuel cells
    • Gas leak detection
    • Gas meters
    • HVAC
    • Meteorolgy