Guest & Grimes Water Level Instrument 1856

  • Original water-level indicator on site (1856), installed to monitor the level of water in the sump below the building from which the first beam engine pumped water.
  • A float on the water surface connects by cord to a drum mechanism which actuates the indicating needle through gearing.
  • The sump is supplied by water through deep conduits from the River Wye.
  • As the sump is gravity fed the height of water in the sump is the same as the height of the river.