An instrument generally suited more to laboratory testing than to field measurements. The micromanometer is difficult to use in the field because of the levering and mounting requirements. Micromanometers are used to measure very low pressures accurately down to plus or minus one thousandth (0.001) inch of water gage. If field measurements below 0.03 in. wg (700 fpm) are required, consider using a 0. to 0.25" inclined manometer, a micromanometer or hot wire anemometer. ( 0301)