Honeywell – MAFS-04 Metal Averaging Flow Sensor

Honeywell Zephyr™ MAF 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 10 SLPM, 15 SLPM, 20 SLPM, 50 SLPM, 100 SLPM, 200 SLPM and 300 SLPM, with custom flow ranges available. The sensors are fully calibrated and temperature compensated with an on-board 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 micro bridge 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. Features & Benefits:

Fast response time (1 ms) allows the customer’s application

to respond quickly to a change in airflow, important in

critical medical (e.g., anaesthesia) and industrial (e.g., fume

hood) applications

High stability reduces errors due to thermal effects and

null shift, providing accurate readings over time and often

eliminating the need for system calibration after PCB mount

and periodically over time

High sensitivity at very low flows provides a fast response

time at the onset or cessation of flow

High 12-bit resolution increases the ability to sense small

airflow changes, allowing customers to more precisely

control their application

Wide airflow range: The industry’s broadest airflow range

measures mass flow with standard flow ranges of 0 to10,

0 to 15, 0 to 20, 0 to 50, 0 to 100, 0 to 200 and 0 SLPM to

300 SLPM, or custom flow ranges, increasing the options to

integrate the sensor into the application

Choice of port styles: Manifold mount, 22 mm OD tapered

male fitting, and G 3/8 female threaded fitting provide

flexibility to choose the pneumatic connection that is best

for the customer’s application

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

Wide supply voltage range (3 Vdc to 10 Vdc) provides a

flexible regulated power circuit which allows the designer the

flexibility to choose the supply voltage that works best in the

system

ASIC-based I2C digital output simplifies integration

to microprocessors or microcontrollers, reducing PCB

complexity and component count

RoHS-compliant materials Meet Directive 2002/95/EC.

Honeywell MAFS-04 — Honeywell Zephyr™ MAF Series sensors provide a digital interface for reading airflow over specified full-scale flow and compensated temperature ranges. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

Specifications