barograph

noun

1. A type of barometer that continuously records air pressure on a sheet or rotating drum

   “Thanks to their barograph, however, they could judge their height above the sea.”

   “At noon the barograph curve turned up and the wind moderated, the sky gradually clearing.”

2. An illuminated glass plate covered by a pressure sensitive sheet, used to measure pressure.

   “A module in the program calculates the load acting on the barograph at the instant of image grabbing .”