Abstract: A tool holder for robotic curing or welding torches includes a housing having a facing part, a stop plate which is at least partially disposed within the housing and has a home position in which the stop plate is disposed proximate the housing facing part. A tool connection coupled to the stop plate is provided so that movement of the tool connection causes movement of the stop plate. A piston element is axially movably mounted in the housing and biased toward the stop plate. The piston element is disposed to be contacted by the stop plate and selectively slid axially in response to movement of either the tool connection or the stop plate. A detector sensor device including a trigger is disposed on the housing to be triggered by axial movement of the piston element.