Tamper resistant sash opening limiter for casement and awning windows

A sash limiter assembly for limiting the distance a casement window can be opened. In a jamb mounted version, the limiter is mounted in one constant location on the jamb rather than multiple locations on the sill which results in the opening distance being essentially the same for all window widths and all hinge types. In both the jamb mounted version and a sill mounted version, a hexalobular or other security screw can be used to retain a limiting arm to a stud attached to a bracket, or a stud attached to a slider which slides on a track to inhibit unauthorized removal of the limiter arm.