Safety gate system, safe interlock and safe guard locking device For; applications up to SIL CL 3 and PL e. Consisting of 5 pushbuttons: 1.; Illuminated pushbutton for activating the safety gate; 2. Key button; for accessing & interlocking the safety gate; 3. Illuminated; pushbutton; 4. Illuminated pushbutton; 5. Section stop pushbutton; Delivery scope: Sensing device with pushbuttons incl. colour caps and; Escape release bar and actuator for right or left hinged gates.