Featuring 7 sensitivity and 18 alarm levels, this electronic refrigerant/gas leak detector recognizes most gases that contain chlorine, fluorine or bromine – also known as halogen gases. The internal microprocessor identifies extremely small concentrations of halogen gases in refrigeration systems, dry cleaning systems, and high voltage circuit breakers. The detector comes with a 14 in. flexible probe, two sensing tips, aluminum case and two C-batteries.