The Multi Gas Monitor - M40 will simultaneously monitor all 4 gases (O2, LEL, CO and H2S)continuously. A battery life indicator is also displayed in the lower left corner. As battery life decreases, the shaded area of the battery icon decreases.
The Multi Gas Monitor - M40 from Extreme Safety also features different modes. In PEAK mode, The Multi Gas Monitor - M40 will display the peak gas readings of the toxic and combustible sensor as well as the lowest reading of the oxygen sensor. There is also the STEL mode. This screen will show the Short Term Exposure Limit readings for both toxic gas sensors.
For safety reasons, the gas monitor also has a low-battery alarm. With approximately 30 minutes of run time left, the instrument will emit a beep every 10 seconds and the battery icon will be flashing.