... make one-stop solution for you. A, Auto Initial Height Sensing(IHS)Torch Retaining Cap IHS and Proximity Switch ... the workpiece, THC automatically lift torch up to IHS height. So with XPTHC-300, user no need to worry ... about torch head crashing.C, Freeze Auto Height Control on Corner SignalXPTHC-300 would freeze Auto Mode ... ship ONE set to anywhere. stand alone torch height controller XPTHC-300