The YELLOW JACKET® Combustible Gas Leak Detector P/N 69310 detects combustible hydrocarbon gases (e.g. natural gases, LPG). Readings are digitally displayed in PPM, % Vol., % LEL, with a rapid response time. The user selected parameter is displayed. LCD display also shows the measurements in a bar graph ranging from 0 to 100% of full scale. Includes a convenient auto-zero drift adjustment and audible and visual indication in case of alarm. The flexible 11” wand (for hard- to-reach leaks) has the gas sensor mounted at the end for detection of low concentrations of hydrocarbons in gas appliances and pipes. To save battery during operation, this detector features an autozero and auto-shut-off function. Packed in a protective hard carrying case with 6x 1.5V AAA alkaline batteries included.