Predictor is an accurate barometer that reads from 28.5 to 31.5 inches of Mercury, has a resettable reminder needle and a precision aneroid movement. Tracks air pressure up to 6500' above sea level.
Proteus is a scientific-grade, temperature-compensated barometer, accurate within ±0.08 inches and a resettable reminder needle. Factory adjustable for elevations over 8,000 ft.
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