Air Monitor has released its OAM II Airflow Measurement System. The company says the system provides reliable airflow measurement without straight duct runs and is accurate when wet. It is unaffected by wind and debris, and has active air density correction. Capabilities include broad airflow operating ranges from minimum through economizer mode, as well as simultaneous split minimum and economizer inlet measurement. The OAM I also has the ability to measure two inlets with a single system.