Honeywell Zephyr™ Digital Airflow Sensors: HAF Series–High Accuracy (10,15, 20 SLPM, 50 SLPM, 100 SLPM, 200 SLPM or 300 SLPM)

Honeywell Zephyr™ HAF Series of airflow 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.

Honeywell's Zephyr digital airflow sensors are designed to measure mass flow of air and other non-corrosive gases. Standard flow ranges are 10 SLPM, 15 SLPM, 20 SLPM, 50 SLPM, 100 SLPM, 200 SLPM or 300 SLPM, with custom flow ranges available. The sensors are fully calibrated and temperature compensated with an onboard Application Specific Integrated Circuit (ASIC).

The HAF Series >10 SLPM is compensated over the calibrated temperature range of 0 °C to 50 °C [32 °F to 122 °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.

Honeywell's Zephyr airflow 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.

Potential applications in medical equipment include: anesthesia delivery machines; ventilators, ventricular assist devices (heart pumps), spirometers; laparoscopy. Potential applications in industrial include:  analytic instrumentation (spectrometry, chromatography), air-to-fuel ratios, fuel cells, fume hoods, gas leak detection, process control gas monitoring, and vacuum pump monitoring.
Be sure to visit eem.com to find a distributor near you, or visit http://sensing.honeywell.com for more information.