Panic Hardware is an exit device which is tested for use on a door that is required to have panic hardware, but cannot be used on a fire door. Panic hardware typically has the dogging feature, which allows the latches to be held retracted to create a push/pull function.
British & International Standards include (but are not limited to) the following:
BS EN 1125:2008 - Building hardware. Panic exit devices operated by a horizontal bar, for use on escape routes. Requirements and test methods
BS EN 1125:1997 - Building hardware. Panic exit devices operated by a horizontal bar. Requirements and test methods