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Environmental monitors designed to continuously detect, measure, and display the difference in air pressure between a closed room and the surrounding environment (i.e., the differential pressure, either positive or negative). These monitors typically include high accuracy airflow sensors capable of measuring very low differential pressures in a range from -25 to +25 Pa (-0.10 to +0.10 inch of water), a display, and alarms for abnormal pressure conditions. The monitors may also include recording capabilities and provide local and/or remote signals that can be used for manual or automated control of the pressure inside the room. Differential pressure environmental monitors are used in areas of healthcare facilities such as patient isolation rooms, autopsy departments, operating rooms, clean rooms, and also in particular areas of clinical laboratories and hospital pharmacies where strict control of pressure and airflow are necessary.
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