The Typical Way To Develop A Tlc/ Hptlc Plate Is To Place It In A Chamber, Which Contains A Sufficient Amount Of Developing Solvent. Driven By Capillary Forces The Developing Solvent Moves Up The Layer Until The Desired Developing Distance Is Reached And Development Is Stopped. With The Aid Of A Watch The Analyst Estimates When The Development Process Is About To Finish, Or The Analyst Must Continually Observe The Movement Of The Solvent Front. With The Smartalert The Analyst Does Not Need To Monitor Or Time The Development. The Desired Migration Distance Is Set By The User, A Light Beam And A Sensor Monitors The Selected Distance, And Once The Front Has Reached The Set Position, Visual And Acoustic Signals Alert The Operator.