E Instruments’ model 7899 portable gas leak detector serves as a tool for the detection of combustible gas leaks, including natural gas, town gas, propane, methane, butane and kerosene. The detector helps to pinpoint small leaks of combustible gas hydrocarbon fuels from any pipes or appliances. It features an LED display, a scale and an audible beeper. The tool uses semiconductor sensors with improved sensitivity levels to detect leaks, according to E Instruments. The small, lightweight detector easily fits in toolboxes for easy transportation and use. Additionally, it senses combustible gas leaks in hard-to-reach places, as it comes with an 11-in. flexible probe.