This barograph is housed in a mahogany case with glass sides and a polished brass handle for easy access. Four-diaphragm bellow add sensitivity and precision. The quartz movement requires no winding and is more accurate than key-wound movements.
The readings are marked with a felt tip pen which lasts 6 to 9 months. Ships with a one-year supply of weekly charts, one felt tip pen and AA battery.
The chart range is 28.5" to 31" over seven days.