A pressure gauge attached to a steam boiler.
- ‘It seemed that every time Charlie opened the throttle, the needle on the steam gauge took a dive.’
- ‘The new piston models are being offered for virtually the same price as the last generation of models with the ‘steam gauges.’’
- ‘They just won't be taught to read and learn the old steam gauges.’
- ‘The old steam gauges on the panel were replaced by glowing displays of flight plans, attitudes and altitudes.’