Honeywell Awm5104Vn..
SENSOR, AIRFLOW, 20SLPM, 50PSI, 1/4 IN-18 NPT; Flow Rate Min:-; Flow Rate Max:20l/min; Pressure Max:50psi; Supply Voltage DC Min:8V; Supply Voltage DC Max:15V; Port Style:1/4" - 18 NPT; Accuracy %:-; Product Range:AWM5000 Series