In contrast to conventional zero-point tooling systems, monitoring sensors were specifically designed for the MTS 4.0. Each of the four chucks in the MTS 4.0 base plate are equipped with a sensor to check the presence of the workpiece holder and to monitor the actuating piston. There is also a force sensor to measure the clamping power. Similar to previous MTS versions, the chuck is operated with compressed air for opening, re-clamping and cleaning functions.