The WL-218 DUOYI DY80B COMBUSTIBLE GAS LEAK METER is a device used to detect the leakage of combustible gases. This type of device is commonly used by plumbers, maintenance personnel and safety specialists for gas leakage control. The DY80B model has sensitive sensors to detect the presence of flammable gases. The device helps prevent potential hazards by alerting the user when a gas leak is detected. Such devices can usually detect natural gas, propane, LPG and similar types of gas.