*It can simultaneously detect the concentration of O2, CO, H2S, and LEL (combustible gases) and provides triple alarm functions: light, vibration, and sound, effectively and promptly delivering alarm signals to keep you away from danger.
*The highest concentration of combustible gas in the air that can cause an explosion when exposed to an open flame is called the Upper Explosion Limit (UEL). Explosion requires three elements: combustible material (gas), oxidant (oxygen), and ignition source (temperature).
*"LEL" in combustible gas detectors refers to the Lower Explosion Limit (LEL).  
  The lower explosion limit of hydrogen is 4%, and the upper limit is 75%;  
  The lower explosion limit of methane is 5%, and the upper limit is 15%;  
  The lower explosion limit of methanol is 5.5%, and the upper limit is 44%;  
  The lower explosion limit of acetylene is 1.5%, and the upper limit is 100%;  
  The lower explosion limit of ammonia is 15%, and the upper limit is 30.2%;  
  The lower explosion limit of carbon monoxide is 12.5%, and the upper limit is 74%.
*It has obtained multiple international certifications, including CE, US FCC, EU RoHS, and explosion-proof grade Ex ib lIB T3 Gb.