These barometers accurately measure atmospheric pressure from sea level to 2000 feet and simultaneously monitor temperature with their built-in glass thermometer. A bimetallic temperature compensation feature preserves pressure accuracy at any temperature. Choose from mbar/in. Hg or mbar/mm Hg models. Both models come in an attractive brass case and include a bezel for easy bulk-head mounting. Includes manual pointer to indicate changes since last viewing. Dimensions: 6.1” dia. x 2” D