Electrical equipment used for detection and concentration measurement of refrigerant gases. Performance requirements and test methods|Classification systems, Combustion, Safety measures, Specimen preparation, Test equipment, Freezers, Ignition, Symbols, Domestic safety, Performance testing, Fixed, Fire safety, Manual control systems, Instructions for use, Fire tests, Mechanical testing, 1st family gases, Refrigerators, 2nd family gases, Automatic control systems, Combustion products, 3rd family gases, Leak tests, Gas-powered devices, Loading, Flames, Design, Built-in, Household equipment, Domestic, Marking, Heat, Installation, Testing conditions, Stability, Portable