The modern generation of weight-sensing task chairs only work correctly if the chairs are set at the correct height (thighs parallel to floor, or very slightly elevated). In todays office environments, occupants often have multiple large monitor screens mounted on arms, which leads to a conflict.
In order to achieve the ergonomically correct position of eye-to-screen, users tend to adjust their chair too high. It is essential that desks can be adjusted to a lower height than the European standard 740mm if this conflict is to be resolved, yet few standard desk-benching systems available in the UK offer the facility to set the worktop below the European standard.