Barometer

Hydrophobic filter allows air to pass yet resists water. The filter will easily stop the entrance of water due to continuous spray and because of its unique construction, it is waterproof to a depth of 3 feet for 30 minutes. It includes a patented "high sensitiv" all metal aneroid movement and has an expanded scale so that the needle noticeably moves as weather conditions change. The scale ranges from 28.5" to 31.5" instead of the traditional 27.5" to 31.5" Hg. It also can be read in millibars.Dial: 3-3/4". Base: 5-7/8". Depth: 2-1/2".