TTI has introduced Honeywell‘s new Zephyr HAF Series analogue airflow sensors. Designed to measure mass flow of air and other non-corrosive gases, Zephyr HF Series sensors provide an analogue interface for reading airflow over specified full-scale flow and compensated temperature ranges. These sensors are fully calibrated and temperature-compensated with a built-in Application-Specific IC for fast response time and precise airflow measurement. The HAF series includes a range of standard flow devices at ±50, ±100, ±200, ±400 and ±750 SCCM. Custom flow ranges are also available for specific end-user requirements.
The HAF Series features a thermally-isolated heater and temperature sensing elements which provide precise airflow measurement with an accuracy of ±2.5%. High sensitivity at very low flows provides a faster response time at the onset or cessation of flow. The state of the art ASIC-based compensation provides analogue outputs with a response time of 1ms. These sensors operate on the heat transfer principle to measure mass airflow.
They consist of a microbridge Microelectronics and Microelectromechanical system, 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, analogue accuracy, repeatable measurements and the ability to customise sensor options to meet the requirements of numerous specific applications. The combination of rugged housings with a stable substrate makes these products extremely robust. They are designed and manufactured according to ISO 9001 standards.
Honeywell‘s new Zephyr HAF Series analogue airflow sensors are suited to medical devices as low pressure drop typically improves patient comfort and reduces noise, and many industrial applications, including analytical instrumentation, gas meters, fuel cells and HVAC.