Gas detector butane / propane / native with support of wall. Detection for emanation by means of sensor of oxide of tin. For use in interior. Function reset automatic after the alarm. Supply 12/24 Vdc and 220 Vac. It incorporates exit of relay of dry contact and optical / acoustic adviser (80db). He has manual push-button for test of the equipment. Time of lower response than 30 sg. Protection surface of 25 m ². Life of the sensor: 5 years. I consume in alarm 2 W. Dimensions 111 x 71 x 43 mm.