The Nautilus 1.5 Hi-Sens Barometer with Inclinometer is state-of-the-art in both accuracy and construction. The all metal high sensitivity aneroid movement includes an expanded scale so that the needle moves noticeably as weather conditions change. The rugged, water resistant anodized aluminum case functions extremely well in punishing saltwater environments. The hydrophobic filter allows air to pass yet resists water. An easy-to-read, green liquid-filled inclinometer is incorporated in the instrument.