Anemometer and Differential Manometer with Pitot Tube. Handheld Digital Manometer: -20 in wc to 20 in wc, Max 15,733 fpm Air Velo., Backlit LCD. These 2-in-1 portable, handheld digital manometers and airflow meters perform static and differential pressure measurements as well as airflow and air velocity measurements and calculations. Kits include a carrying case, pitot tube, static pressure tips, fittings, and tubing.