When you are looking at the Zephyr HAF Series of Airflow sensors from Honeywell will breakdown into 10 sections. Below is a part builder from the Manufacturer Data sheet.
HAF Series.pdf (637.1 KB)
Applicable part Numbers
480-4947-ND 480-3871-ND 480-3866-ND 480-3324-ND 480-5671-ND 480-3867-ND HAFBLF0100C4AX5-ND 480-3872-ND 480-3874-ND 480-3869-ND 480-5786-ND 480-3868-ND 480-5795-ND 480-5792-ND 480-5669-ND 480-5670-ND 480-5673-ND 480-5674-ND 480-5672-ND 480-5789-ND 480-5797-ND 480-5784-ND 480-5788-ND 480-5791-ND 480-5793-ND
HAFBLF0200CAAX5 HAFBLF0200C4AX5 HAFBLF0050CAAX5 HAFBSF0200CAAX5 HAFUHT0020L4AXT HAFBLF0050C4AX5 HAFBLF0100C4AX5 HAFBLF0200C4AX3 HAFBSF0200C4AX3 HAFBLF0750C4AX5 HAFUHT0010L4AXT HAFBLF0750CAAX5 HAFUHT0100L4AXT HAFUHT0050L4AXT HAFUHM0020L4AXT HAFUHM0200L4AXT HAFUHH0020L4AXT HAFUHH0200L4AXT HAFUHT0200L4AXT HAFUHT0015L4AXT HAFUHH0300L4AXT HAFUHM0010L4AXT HAFUHH0015L4AXT HAFUHH0050L4AXT HAFUHM0100L4AXT