Multi Gas Detector Drager X-am 2500 has a large, easy to read, liquid-crystal display. All gas readings are shown simultaneously and resize automatically depending on the number of sensors installed.Multi Gas detector When a gas alarm occurs, the reading for the sensor in alarm will be highlighted and will alternate with the alarm level indication of A1 or A2. Benefits: • Matrix Display • Zone 0 Approved • High Capacity Battery • Long-Lasting, Reliable Sensor Technology • Peak value functionality