Airflow Meter. An airflow meter measures air velocity as well as air pressure. Depending on the type of application, the airflow meter is made as a hot-wire airflow meter, a vane airflow meter, a cup anemometer, a Pitot tube air flow meter or a pocket weather flow meter, all of which can measure air velocity as well as air pressure. Some can even detect the wind direction.
While hemorrhoids can bleed, the amount of actual blood loss is typically slight, so anemia is very uncommon with bleeding hemorrhoids. If you are on blood thinners, such as Aspirin and warfarin, the bleeding might be more impressive, but again anemia would be unexpected.
External hemorrhoids occur under the skin around the anus and can be exquisitely painful. Damage to the delicate surface of a hemorrhoid may cause it to bleed. Signs and symptoms of hemorrhoids may include blood in the stool, itching or irritation in the anal region, and a painful swelling or lump around the anus. The Mayo Clinic estimates just about 50-percent of adults have experienced hemorrhoid symptoms by the age of 50.