The crowbars of control with return by dock (in that the crowbar goes back to the initial position by the strength of the dock after the accionamiento manual), with fixed position (in that the crowbar keeps in the position chosen, with a rearm manual) and return by dock / fixed position (with option of accionamiento fixed or momentary of the crowbar) form part of the section of special versions of the catalogue of monitoring equipment and signaling of Elan. They are available for orifices of setting of 22,3 and 30,5 mm, in rejillas of 40 x 65 mm in the case of the crowbars with return by dock, or of 80 x 80 mm in the case of the crowbars of fixed position.
The main characteristic of the robust version of the devices are: